L-FW802B-DB [AGERE]
Low-Power PHY IEEE㈢ 1394A-2000 Two-Cable Transceiver/Arbiter Device; 低功耗PHY IEEE㈢ 1394A - 2000双电缆收发器/仲裁器设备
| 型号： | L-FW802B-DB |
| 厂家： | 
AGERE SYSTEMS |
| 描述： | Low-Power PHY IEEE㈢ 1394A-2000 Two-Cable Transceiver/Arbiter Device |
| 文件： | 总26页 (文件大小：337K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet, Rev. 3
May 2004
™
FW802B Low-Power PHY IEEE® 1394A-2000
Two-Cable Transceiver/Arbiter Device
■ Fully supports suspend/resume.
Distinguishing Features
■ Supports PHY-link interface initialization and reset.
■ Supports 1394a-2000 register set.
■ Compliant with IEEE Standard 1394a-2000, IEEE
Standard for a High Performance Serial Bus
Amendment 1.
■ Supports LPS/link-on as a part of PHY-link inter-
face.
■ Low-power consumption during powerdown or
microlow-power sleep mode.
■ Supports provisions of IEEE 1394-1995 Standard
for a High Performance Serial Bus.
■ Fully interoperable with FireWire® implementation
of IEEE 1394-1995.
■ Supports extended BIAS_HANDSHAKE time for
enhanced interoperability with camcorders.
■ While unpowered and connected to the bus, the
device will not drive TPBIAS on a connected port
even if receiving incoming bias voltage on that port.
■ Reports cable power fail interrupt when voltage at
CPS pin falls below 7.5 V.
■ Provides separate cable bias and driver termination
voltage supply for each port.
■ Does not require external filter capacitors for PLL.
■ Does not require a separate 5 V supply for 5 V link
controller interoperability.
™
Other Features
■ Interoperable across 1394 cable with 1394 physi-
cal layers (PHY) using 5 V supplies.
■ 64-pin TQFP package. (Lead-free package also
available. See ordering information on page 25.)
■ Interoperable with 1394 link-layer controllers using
5 V supplies.
■ Single 3.3 V supply operation.
■ 1394a-2000 compliant common-mode noise filter
on incoming TPBIAS.
■ Data interface to link-layer controller provided
through 2/4/8 parallel lines at 50 Mbits/s.
■ Powerdown features to conserve energy in battery-
powered applications include:
— Device powerdown pin.
— Link interface disable using LPS.
— Inactive ports power down.
■ 25 MHz crystal oscillator and PLL provide a
50 MHz link-layer controller clock as well as trans-
mit/receive data at 100 Mbits/s, 200 Mbits/s, and
400 Mbits/s.
— Automatic microlow-power sleep mode during
suspend.
■ Node power-class information signaling for system
power management.
■ Interface to link-layer controller supports Annex J
electrical isolation as well as bus-keeper isolation.
■ Multiple separate package signals provided for ana-
log and digital supplies and grounds.
Features
Description
■ Provides two fully compliant cable ports at
100 Mbits/s, 200 Mbits/s, and 400 Mbits/s.
The Agere Systems Inc. FW802B device provides
the analog physical layer functions needed to imple-
ment a two-port node in a cable-based IEEE 1394-
1995 and IEEE 1394a-2000 network.
■ Fully supports 1394 Open HCI requirements.
■ Supports arbitrated short bus reset to improve
utilization of the bus.
Each cable port incorporates two differential line
transceivers. The transceivers include circuitry to
monitor the line conditions as needed for determin-
ing connection status, for initialization and arbitration,
and for packet reception and transmission. The PHY
is designed to interface with a link-layer controller
(LLC).
■ Supports ack-accelerated arbitration and fly-by con-
catenation.
■ Supports connection debounce.
■ Supports multispeed packet concatenation.
■ Supports PHY pinging and remote PHY access
packets.
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Table of Contents
Contents
Page
Distinguishing Features ...............................................................................................................................................1
Features ......................................................................................................................................................................1
Other Features ............................................................................................................................................................1
Description ..................................................................................................................................................................1
Signal Information .......................................................................................................................................................6
Application Information ..............................................................................................................................................11
Crystal Selection Considerations ..............................................................................................................................12
Load Capacitance ..............................................................................................................................................13
Adjustment to Crystal Loading ...........................................................................................................................13
Crystal/Board Layout ..........................................................................................................................................13
1394 Application Support Contact Information ..........................................................................................................13
Absolute Maximum Ratings .......................................................................................................................................14
Electrical Characteristics ...........................................................................................................................................15
Timing Characteristics ...............................................................................................................................................18
Timing Waveforms ....................................................................................................................................................19
Internal Register Configuration ..................................................................................................................................20
Outline Diagrams .......................................................................................................................................................25
64-Pin TQFP ......................................................................................................................................................25
Ordering Information .................................................................................................................................................25
List of Figures
Figures
Page
Figure 1. Block Diagram ..............................................................................................................................................5
Figure 2. Pin Assignments ..........................................................................................................................................6
Figure 3. Typical External Component Connections .................................................................................................11
Figure 4. Typical Port Termination Network ..............................................................................................................12
Figure 5. Crystal Circuitry ..........................................................................................................................................13
Figure 6. Dn, CTLn, and LREQ Input Setup and Hold Times Waveforms ................................................................19
Figure 7. Dn, CTLn Output Delay Relative to SYSCLK Waveforms .........................................................................19
List of Tables
Tables
Page
Tables 1. Signal Descriptions ......................................................................................................................................7
Tables 2. Absolute Maximum Ratings .......................................................................................................................14
Tables 3. Analog Characteristics ...............................................................................................................................15
Tables 4. Driver Characteristics ................................................................................................................................16
Tables 5. Device Characteristics ...............................................................................................................................17
Tables 6. Switching Characteristics ..........................................................................................................................18
Tables 7. Clock Characteristics ................................................................................................................................18
Tables 8. PHY Register Map for the Cable Environment .........................................................................................20
Tables 9. PHY Register Fields for the Cable Environment .......................................................................................20
Tables 10. PHY Register Page 0: Port Status Page ................................................................................................22
Tables 11. PHY Register Port Status Page Fields ...................................................................................................23
Tables 12. PHY Register Page 1: Vendor Identification Page ................................................................................24
Tables 13. PHY Register Vendor Identification Page Fields .................................................................................24
2
Agere Systems Inc.
Data Sheet, Rev. 3
May 2004
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
monitors the incoming cable common-mode voltage.
The value of this common-mode voltage is used during
arbitration to set the speed of the next packet
transmission. In addition, the TPB channel monitors
the incoming cable common-mode voltage for the
presence of the remotely supplied twisted-pair bias
voltage. This monitor is called bias-detect.
Description (continued)
The PHY requires either an external 24.576 MHz
crystal or crystal oscillator. The internal oscillator
drives an internal phase-locked loop (PLL), which
generates the required 393.216 MHz reference signal.
The 393.216 MHz reference signal is internally divided
to provide the 49.152 MHz, 98.304 MHz, and
196.608 MHz clock signals that control transmission of
the outbound encoded strobe and data information.
The 49.152 MHz clock signal is also supplied to the
associated LLC for synchronization of the two chips
and is used for resynchronization of the received data.
The powerdown function, when enabled by the PD
signal high, stops operation of the PLL and disables all
circuitry except the cable-not-active (CNA) signal
circuitry.
The TPBIAS circuit monitors the value of incoming
TPA pair common-mode voltage when local TPBIAS is
inactive. Because this circuit has an internal current
source and the connected node has a current sink, the
monitored value indicates the cable connection status.
This monitor is called connect-detect.
Both the TPB bias-detect monitor and TPBIAS
connect-detect monitor are used in suspend/resume
signaling and cable connection detection.
The PHY provides a 1.86 V nominal bias voltage for
driver load termination. This bias voltage, when seen
through a cable by a remote receiver, indicates the
presence of an active connection. The value of this
bias voltage has been chosen to allow interoperability
between transceiver chips operating from 5 V or 3 V
nominal supplies. This bias voltage source should be
stabilized by using an external filter capacitor of
approximately 0.33 µF.
The PHY supports an isolation barrier between itself
and its LLC. When /ISO is tied high, the link interface
outputs behave normally. When /ISO is tied low,
internal differentiating logic is enabled, and the outputs
become short pulses, which can be coupled through a
capacitor or transformer as described in the
IEEE 1394-1995 Annex J. To operate with bus-keeper
isolation, the /ISO pin of the FW802B must be tied
high.
The transmitter circuitry, the receiver circuitry, and the
twisted-pair bias voltage circuity are all disabled with a
powerdown condition. The powerdown condition
occurs when the PD input is high. The port transmitter
circuitry, the receiver circuitry, and the TPBIAS output
are also disabled when the port is disabled,
Data bits to be transmitted through the cable ports are
received from the LLC on two, four, or eight data lines
(D[0:7]), and are latched internally in the PHY in
synchronization with the 49.152 MHz system clock.
These bits are combined serially, encoded, and
transmitted at 98.304 Mbits/s, 196.608 Mbits/s, or
393.216 Mbits/s as the outbound data-strobe
information stream. During transmission, the encoded
data information is transmitted differentially on the TPA
and TPB cable pair(s).
suspended, or disconnected.
The line drivers in the PHY operate in a high-
impedance current mode and are designed to work
with external 112 Ω line-termination resistor networks.
One network is provided at each end of each twisted-
pair cable. Each network is composed of a pair of
series-connected 56 Ω resistors. The midpoint of the
pair of resistors that is directly connected to the
twisted-pair A (TPA) signals is connected to the
TPBIAS voltage signal. The midpoint of the pair of
resistors that is directly connected to the twisted-pair B
(TPB) signals is coupled to ground through a parallel
RC network with recommended resistor and capacitor
values of 5 kΩ and 220 pF, respectively. The value of
the external resistors are specified to meet the
standard specifications when connected in parallel
with the internal receiver circuits.
During packet reception, the TPA and TPB
transmitters of the receiving cable port are disabled,
and the receivers for that port are enabled. The
encoded data information is received on the TPA and
TPB cable pair. The received data-strobe information
is decoded to recover the receive clock signal and the
serial data bits. The serial data bits are split into two
(for S100), four (for S200), or eight (for S400) parallel
streams, resynchronized to the local system clock, and
sent to the associated LLC. The received data is also
transmitted (repeated) out of the other active
(connected) cable ports.
Both the TPA and TPB cable interfaces incorporate
differential comparators to monitor the line states
during initialization and arbitration. The outputs of
these comparators are used by the internal logic to
determine the arbitration status. The TPA channel
The driver output current, along with other internal
operating currents, is set by an external resistor. This
resistor is connected between the R0 and R1 signals
and has a value of 2.49 kΩ ± ±1%.
Agere Systems Inc.
3
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
the FW802B’s ports is not wired to a connector, those
unused to a connector, those unused ports may be left
unconnected without normal termination. When a port
does not have a cable connected, internal connect-
detect circuitry will keep the port in a disconnected
state.
Description (continued)
The FW802B supports suspend/resume as defined in
the IEEE 1394a-2000 specification. The suspend
mechanism allows an FW802B port to be put into a
suspended state. In this state, a port is unable to
transmit or receive data packets, however, it remains
capable of detecting connection status changes and
detecting incoming TPBias. When all ports of the
FW802B are suspended, all circuits except the bias
voltage reference generator and bias detection circuits
are powered down, resulting in significant power
savings. The use of suspend/resume is recommended.
Note: All gap counts on all nodes of a 1394 bus must
be identical. The software accomplishes this by
issuing PHY configuration packets (see Section
4.3.4.3 of the IEEE 1394a-2000 standard) or by
issuing two bus resets, which resets the gap
counts to the maximum level (3Fh).
The link power status (LPS) signal works with the
C/LKON signal to manage the LLC power usage of the
node. The LPS signal indicates that the LLC of the
node is powered up or powered down. If LPS is inac-
tive for more than 1.2 µs and less than 25±µs, the
PHY/link interface is reset. If LPS is inactive for greater
than 25 µs, the PHY will disable the PHY/link interface
to save power. FW802B continues its repeater function
even when the PHY/link interface is disabled. If the
PHY then receives a link-on packet, the C/LKON sig-
nal is activated to output a 6.114 MHz signal, which
can be used by the LLC to power itself up. Once the
LLC is powered up, the LPS signal communicates this
to the PHY and the PHY/link interface is enabled. The
C/LKON signal is turned off when LPS is active or
when a bus reset occurs, provided the interrupt that
caused C/LKON is not present.
Four signals are used as inputs to set four
configuration status bits in the self-identification (self-
ID) packet. These signals are hardwired high or low as
a function of the equipment design. PC[0:2] are the
three signals that indicate either the need for power
from the cable or the ability to supply power to the
cable. The fourth signal, C/LKON, as an input,
indicates whether a node is a contender for bus
manager. When the C/LKON signal is asserted, it
means the node is a contender for bus manager. When
the signal is not asserted, it means that the node is not
a contender. The C bit corresponds to bit 20 in the self-
ID packet. PC[0:2] corresponds to the pwr field of the
Self-ID packet in the following manner: PC0
corresponds to bit 21, PC1 corresponds to bit 22, and
PC2 corresponds to bit 23 (see Self-ID packets table in
section 4.3.4.1 of the IEEE 1394a-2000 standard for
additional details).
When the PHY/link interface is in the disabled state, the
FW802B will automatically enter a low-power mode, if
all ports are inactive (disconnected, disabled, or sus-
pended). In this low-power mode, the FW802B disables
its PLL and also disables parts of its reference circuitry
depending on the state of the ports (some reference cir-
cuitry must remain active in order to detect incoming TP
bias). The lowest power consumption (the microlow-
power sleep mode) is attained when all ports
A powerdown signal (PD) is provided to allow a
powerdown mode where most of the PHY circuits are
powered down to conserve energy in battery-powered
applications. The internal logic in FW802B is reset as
long as the powerdown signal is asserted. A cable
status signal, CNA, provides a high output when none
of the twisted-pair cable ports are receiving incoming
bias voltage. This output is not debounced. The CNA
output can be used to determine when to power the
PHY down or up. In the powerdown mode, all circuitry
is disabled except the CNA circuitry. It should be noted
that when the device is powered down, it does not act
in a repeater mode.
are either disconnected or disabled with the ports inter-
rupt enable bit (see Table 11) cleared. The FW802B will
exit the low-power mode when the LPS input is
asserted high or when a port event occurs that requires
the FW802B to become active in order to respond to the
event or to notify the LLC of the event (e.g., incoming
bias or disconnection is detected on a suspended port,
a new connection is detected on a nondisabled port,
etc.). When the FW802B is in the low-power mode, the
SYSCLK output will become active (and the PHY/link
interface will be initialized and become operative) within
3 ms after LPS is asserted high.
When the power supply of the PHY is removed while
the twisted-pair cables are connected, the PHY
transmitter and receiver circuitry has been designed to
present a high impedance to the cable in order to not
load the TPBIAS signal voltage on the other end of the
cable.
Two of the FW802B’s signals are used to set up
various test conditions used only during the device
manufacturing process. These signals (SE and SM)
should be connected to VSS for normal operation.
Whenever the TBA±/TPB± signals are wired to a
connector, they must be terminated using the normal
termination network (See Figure 4). This is required for
reliable operation. For those applications, when one of
4
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Description (continued)
CPS
LPS
RECEIVED
BIAS
VOLTAGE
AND
CURRENT
GENERATOR
DATA
R0
R1
/ISO
DECODER/
RETIMER
CNA
SYSCLK
LREQ
CTL0
LINK
INTERFACE
I/O
CTL1
D0
D1
D2
D3
D4
D5
D6
D7
TPA0+
TPA0–
ARBITRATION
AND
TPBIAS0
CONTROL
STATE
MACHINE
LOGIC
PC0
PC1
PC2
CABLE PORT 0
TPB0+
TPB0–
C/LKON
SE
SM
PD
TPA1+
TPA1–
TPBIAS1
TPB1+
TPB1–
CABLE PORT 1
TRANSMIT
DATA
ENCODER
/RESET
CRYSTAL
OSCILLATOR,
PLL SYSTEM,
AND
XI
XO
CLOCK
GENERATOR
5-5459.f (F)
Figure 1. Block Diagram
Agere Systems Inc.
5
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Signal Information
LREQ
VSS
CTL0
CTL1
D0
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
NC
PIN #1 IDENTIFIER
2
NC
3
NC
4
NC
5
NC
D1
6
VDDA
VDD
D2
7
TPBIAS1
TPA1+
TPA1–
TPB1+
TPB1–
TPBIAS0
TPA0+
TPA0–
TPB0+
TPB0–
8
AGERE FW802B
D3
9
D4
10
11
12
13
14
15
16
D5
D6
D7
VSS
CNA
LPS
Note: Active-low signals are indicated by “/” at the beginning of signal names, within this document.
5-6236.b (F)
Figure 2. Pin Assignments
6
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Signal Information (continued)
Table 1. Signal Descriptions
Pin
Signal*
Type
Name/Description
18
C/LKON
I/O
Bus Manager Capable Input and Link-On Output. On hardware reset
(/RESET), this pin is used to set the default value of the contender status
indicated during self-ID. The bit value programming is done by tying the
signal through a 10 kΩ resistor to VDD (high, bus manager capable) or to
GND (low, not bus manager capable). Using either the pull-up or pull-
down resistor allows the link-on output to override the input value when
necessary.
After hardware reset, this pin is set as an output. If the LPS is inactive,
C/LKON indicates one of the following events by asserting a 6.114 MHz
signal.
1. FW802B receives a link-on packet addressed to this node.
2. Port_event register bit is 1.
3. Any of the Timeout, Pwr_fail, or Loop register bits are 1 and the
Watchdog register bit is also 1.
4. Once activated, the C/LKON output will continue active until the LPS
becomes active. The PHY also deasserts the C/LKON output when a
1394 bus reset occurs, if the C/LKON is active due solely to the recep-
tion of a link-on packet.
Note: If an interrupt condition exists which would otherwise cause the
C/LKON output to be activated if the LPS were inactive, the
C/LKON output will be activated when the LPS subsequently
becomes inactive.
15
24
CNA
CPS
O
I
Cable-Not-Active Output. CNA is asserted high when none of the PHY
ports are receiving an incoming bias voltage. This circuit remains active
during the powerdown mode.
Cable Power Status. CPS is normally connected to the cable power
through a 400 kΩ resistor. This circuit drives an internal comparator that
detects the presence of cable power. This information is maintained in one
internal register and is available to the LLC by way of a register read (see
Table 8, address register 00002, bit 7/PS). In applications that do not sink
or source 1394 power (VP), this pin can be tied to ground.
Note: When this pin is grounded, the Pwr_fail bit in PHY register 01012 will
be set.
3
4
CTL0
CTL1
D[0:7]
I/O
I/O
Control I/O. The CTLn signals are bidirectional communications control
signals between the PHY and the LLC. These signals control the passage
of information between the two devices. Bus-keeper circuitry is built into
these terminals.
5, 6, 8,
9, 10, 11,
12, 13
Data I/O. The Dn signals are bidirectional and pass data between the
PHY and the LLC. Bus-keeper circuitry is built into these terminals.
* Active-low signals are indicated by “/” at the beginning of signal names, within this document.
Agere Systems Inc.
7
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Signal Information (continued)
Table 1. Signal Descriptions (continued)
Pin
Signal*
Type
Name/Description
23
/ISO
I
Link Interface Isolation Disable Input (Active-Low). /ISO controls the
operation of an internal pulse differentiating function used on the
PHY-LLC interface signals, CTLn and Dn, when they operate as outputs.
When /ISO is asserted low, the isolation barrier is implemented between
PHY and its LLC (as described in Annex J of IEEE 1394-1995).
/ISO is normally tied high to disable isolation differentiation. Bus-keepers
are enabled when /ISO is high (inactive) on CTLn, Dn, and LREQ. When
/ISO is low (active), the bus-keepers are disabled. Please refer to Agere’s
application note IEEE 1394 Isolation (AP98-074CMPR) for more informa-
tion.
16
LPS
I
Link Power Status. LPS is connected to either the VDD supplying the
LLC or to a pulsed output that is active when the LLC is powered for the
purpose of monitoring the LLC power status. If LPS is inactive for more
than 1.2 µs and less than 25±µs, the PHY-link interface is reset. If LPS is
inactive for greater than 25±µs, the PHY will disable the PHY/link interface
to save power. FW802B continues its repeater function.
1
LREQ
NC
I
—
I
Link Request. LREQ is an output from the LLC that requests the PHY to
perform some service. Bus-keeper circuitry is built into this terminal.
44, 45, 46,
47, 48
No Connect.
20
21
22
PC0
PC1
PC2
Power-Class Indicators. On hardware reset (/RESET), these inputs set
the default value of the power class indicated during SelfID. These bits can
be tied to VDD (high) or to ground (low) as required for particular power
consumption and source characteristics. In SelfID packet (see Section
4.3.4.1 of the 1394a-2000 Specification), PC0, the most significant bit of
this 3-bit field, corresponds to bit 20, PC1 corresponds to bit 21, and PC2
corresponds to bit 22. As an example, for a Power_Class value of 001,
PC0 = 0, PC1 = 0, and PC2 = 1.
19
PD
I
Powerdown. When asserted high, PD turns off all internal circuitry except
the bias-detect circuits that drive the CNA signal. Internal FW802B logic is
kept in the reset state as long as PD is asserted. The PD terminal is
provided for backward compatibility. It is recommended that the FW802B
be allowed to manage its own power consumption using suspend/resume
in conjunction with LPS. C/LKON features are defined in the IEEE 1394a-
2000 specification.
57
58
54
VDDPLL
VSSPLL
R0
—
—
I
Power for PLL Circuit. VDDPLL supplies power to the PLL circuitry
portion of the device.
Ground for PLL Circuit. VSSPLL is tied to a low-impedance ground
plane.
Current Setting Resistor. An internal reference voltage is applied to a
resistor connected between R0 and R1 to set the operating current and
the cable driver output current. A low temperature-coefficient resistor
(TCR) with a value of 2.49 kΩ ± ±1% should be used to meet the
IEEE 1394-1995 standard requirements for output voltage limits.
55
R1
* Active-low signals are indicated by “/” at the beginning of signal names, within this document.
8
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Signal Information (continued)
Table 1. Signal Descriptions (continued)
Pin
Signal*
Type
Name/Description
61
/RESET
I
Reset (Active-Low). When /RESET is asserted low (active), a 1394 bus
reset condition is set on the active cable ports and the FW802B is reset to
the reset start state. To guarantee that the PHY will reset, this pin must be
held low for at least 2 ms. An internal pull-up resistor connected to VDD is
provided so that only an external delay capacitor (0.1 µF) and resistor
(510 kΩ), in parallel, are required to connect this pin to ground. This
circuitry will ensure that the capacitor will be discharged when PHY power
is removed. This input is a standard logic buffer and can also be driven by
an open-drain logic output buffer. Do not leave this pin unconnected.
28
29
63
SE
SM
I
I
Test Mode Control. SE is used during Agere’s manufacturing test and
should be tied to VSS for normal operation.
Test Mode Control. SM is used during Agere’s manufacturing test and
should be tied to VSS for normal operation.
SYSCLK
O
System Clock. SYSCLK provides a 49.152 MHz clock signal, which is
synchronized with the data transfers to the LLC.
36
35
TPA0+
Analog I/O Port0, Port Cable Pair A. TPA0± is the port A connection to the twisted-
pair cable. Board traces from each pair of positive and negative differen-
tial signal pins should be kept as short as possible and matched to the
external load resistors and to the cable connector. When the FW802B’s
1394 port pins are not wired to a connector, the unused port pins may be left
unconnected. Internal connect-detect circuitry will keep the port in a discon-
nected state.
TPA0−
41
40
TPA1+
TPA1−
Analog I/O Port1, Port Cable Pair A. TPA1± is the port A connection to the twisted-
pair cable. Board traces from each pair of positive and negative differen-
tial signal pins should be kept as short as possible and matched to the
external load resistors and to the cable connector. When the FW802B’s
1394 port pins are not wired to a connector, the unused port pins may be
left unconnected. Internal connect-detect circuitry will keep the port in a
disconnected state.
34
33
TPB0+
Analog I/O Port0, Port Cable Pair B. TPB0± is the port B connection to the twisted-
pair cable. Board traces from each pair of positive and negative differen-
tial signal pins should be kept as short as possible and matched to the
external load resistors and to the cable connector. When the FW802B’s
1394 port pins are not wired to a connector, the unused port pins may be
left unconnected. Internal connect-detect circuitry will keep the port in a
disconnected state.
TPB0−
39
38
TPB1+
TPB1−
Analog I/O Port1, Port Cable Pair B. TPB1± is the port B connection to the twisted-
pair cable. Board traces from each pair of positive and negative differen-
tial signal pins should be kept as short as possible and matched to the
external load resistors and to the cable connector. When the FW802B’s
1394 port pins are not wired to a connector, the unused port pins may be
left unconnected. Internal connect-detect circuitry will keep the port in a
disconnected state.
* Active-low signals are indicated by “/” at the beginning of signal names, within this document.
Agere Systems Inc.
9
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Signal Information (continued)
Table 1. Signal Descriptions (continued)
Pin
Signal*
Type
Name/Description
37
TPBIAS0
Analog I/O Portn, Twisted-Pair Bias. (Where n refers to the port number). TPBIAS
provides the 1.86 V nominal bias voltage needed for proper operation of
the twisted-pair cable drivers and receivers and for sending a valid cable
connection signal to the remote nodes. When the FW802B’s 1394 port
pins are not wired to a connector, the unused port pins may be left uncon-
nected. Internal connect-detect circuitry will keep the port in a discon-
nected state.
42
TPBIAS1
7, 17,
26, 27, 62
VDD
VDDA
VSS
VSSA
XI
—
—
—
—
—
Digital Power. VDD supplies power to the digital portion of the device.
30, 31,
43, 50, 51
Analog Circuit Power. VDDA supplies power to the analog portion of the
device.
2, 14,
25, 56, 64
Digital Ground. All VSS signals should be tied to the low-impedance
ground plane.
32, 49,
52, 53
Analog Circuit Ground. All VSSA signals should be tied together to a low-
impedance ground plane.
59
Crystal Oscillator. XI and XO connect to a 24.576 MHz parallel resonant
fundamental mode crystal. Although, when a 24.576 MHz clock source is
used, it can be connected to XI with XO left unconnected. The optimum
values for the external load capacitors and resistor are dependent on the
specifications of the crystal used. It is necessary to add an external series
resistor (RL) to the XO pin (see Figures 3 and 5). For more details, refer to
the Crystal Selection Considerations section in the data sheet. Note that it
is very important to place the crystal as close as possible to the XO and XI
pins, i.e., within 0.5 in./1.27 cm.
60
XO
* Active-low signals are indicated by “/” at the beginning of signal names, within this document.
10
Agere Systems Inc.
Data Sheet, Rev. 3
May 2004
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Application Information
CL
CL
510 kΩ
0.1 µF
LREQ
VSS
CTL0
CTL1
D0
NC
48
1
NC
PIN #1 IDENTIFIER
2
47
NC
46
3
NC
4
45
NC
44
5
D1
VDDA
6
43
VDD
D2
TPBIAS1
42
7
TPA1+
8
41
AGERE FW802B
LLC
D3
TPA1–
TPB1+
TPB1–
TPBIAS0
TPA0+
TPA0–
TPB0+
TPB0–
PORT 1*
PORT 0*
9
40
39
38
37
36
35
34
33
D4
10
11
12
13
14
15
16
D5
D6
D7
VSS
CNA
LPS
LLC PULSE
OR VDD
5-6767 (F)
* See Figure 4 for typical port termination network.
Figure 3. Typical External Component Connections
Agere Systems Inc.
11
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Application Information (continued)
TPBIAS1
42
41
40
39
38
37
36
35
34
33
TPBIAS1
TPA1+
TPA1–
TPB1+
TPB1–
TPBIAS0
USE SAME PORT TERMINATION NETWORK AS ILLUSTRATED BELOW.
0.33 µF
56±Ω
56 Ω
TPA0+
TPA0–
TPB0+
5
6
IEEE 1394-1995 STANDARD
CONNECTOR
TPB0–
3
1
4
2
56 Ω
56 Ω
5 kΩ
220 pF
VP
VG
CABLE
POWER
5-6930 (F)
Figure 4. Typical Port Termination Network
Crystal Selection Considerations
The FW802B is designed to use an external 24.576 MHz parallel resonant fundamental mode crystal connected
between the XI and XO terminals to provide the reference for an internal oscillator circuit. The IEEE 1394a-2000
standard requires that FW802B have less than ± 100 ppm total variation from the nominal data rate, which is
directly influenced by the crystal. To achieve this, it is recommended that an oscillator with a nominal 50 ppm or
less frequency tolerance be used.
The total frequency variation must be kept below ± 100 ppm from nominal with some allowance for error introduced
by board and device variations. Trade offs between frequency tolerance and stability may be made as long as the
total frequency variation is less than ± 100 ppm.
12
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Crystal Selection Considerations (continued)
Load Capacitance
The frequency of oscillation is dependent upon the load capacitance specified for the crystal, in parallel resonant
mode crystal circuits. Total load capacitance (CL) is a function of not only the discrete load capacitors, but also
capacitances from the FW802B board traces and capacitances of the other FW802B connected components.
The values for load capacitors (CA and CB) should be calculated using this formula:
CA = CB = (CL – Cstray) × 2
CA
XI
RL
CB
XO
A
Where:
CL = load capacitance specified by the crystal manufacturer
Cstray = capacitance of the board and the FW802B, typically 2 pF—3 pF
RL = load resistance; the value of RL is dependent on the specific crystal used. Please refer to your crystal manufacturer’s data sheet
and application notes to determine an appropriate value.
Figure 5. Crystal Circuitry
Adjustment to Crystal Loading
The resistor (RL) in Figure 5 is recommended for fine-tuning the crystal circuit. The value for this resistor is depen-
dent on the specific crystal used. Please refer to your crystal manufacturer’s data sheet and application notes to
determine an appropriate value for RL. A more precise value for this resistor can be obtained by placing different
values of RL on a production board and using an oscilloscope to view the resultant clock waveform at node A for
each resistor value. The desired waveform should have the following characteristics: the waveform should be sinu-
soidal, with an amplitude as large as possible, but not greater than 3.3 V or less than 0 volts.
Crystal/Board Layout
The layout of the crystal portion of the PHY circuit is important for obtaining the correct frequency and minimizing
noise introduced into the FW802B PLL. The crystal and two load capacitors (CA + CB) should be considered as a
unit during layout. They should be placed as close as possible to one another, while minimizing the loop area cre-
ated by the combination of the three components. Minimizing the loop area minimizes the effect of the resonant
current that flows in this resonant circuit. This layout unit (crystal and load capacitors) should then be placed as
close as possible to the PHY XI and XO terminals to minimize trace lengths. Vias should not be used to route the
XI and XO signals.
1394 Application Support Contact Information
E-mail: support1394@agere.com
Agere Systems Inc.
13
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter
Supply Voltage Range
Symbol
Min
Max
Unit
VDD
VI
3.0
−0.5
−0.5
0
3.6
VDD + 0.5
VDD + 0.5
70
V
V
Input Voltage Range*
Output Voltage Range at Any Output
Operating Free Air Temperature
Storage Temperature Range
VO
TA
V
°C
°C
Tstg
–65
150
* Except for 5 V tolerant I/O (CTL0, CTL1, D0—D7, and LREQ) where VI max = 5.5 V.
14
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Electrical Characteristics
Table 3. Analog Characteristics
Parameter
Test Conditions
Symbol
Min Typ Max Unit
Supply Voltage
Source power node
VDD—SP
VID—100
VID—200
VID—400
VID—ARB
VCM
3.0
142
3.3
—
—
—
—
—
3.6
260
V
Differential Input Voltage
Cable inputs, 100 Mbits/s operation
Cable inputs, 200 Mbits/s operation
Cable inputs, 400 Mbits/s operation
Cable inputs, during arbitration
mV
mV
mV
mV
V
132
260
100
260
168
265
Common-mode Voltage
Source Power Mode
TPB cable inputs,
speed signaling off
1.165
2.515
TPB cable inputs,
S100 speed signaling on
VCM—SP—100
VCM—SP—200
VCM—SP—400
VCM
1.165
0.935
0.532
1.165
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.515
2.515
2.515
2.015
2.015
2.015
2.015
1.08
V
V
TPB cable inputs,
S200 speed signaling on
TPB cable inputs,
S400 speed signaling on
V
Common-mode Voltage
Nonsource Power Mode*
TPB cable inputs,
speed signaling off
V
TPB cable inputs,
S100 speed signaling on
VCM—NSP—100 1.165
VCM—NSP—200 0.935
VCM—NSP—400 0.532
V
TPB cable inputs,
S200 speed signaling on
V
TPB cable inputs,
S400 speed signaling on
V
Receive Input Jitter
Receive Input Skew
TPA, TPB cable inputs,
100 Mbits/s operation
—
—
—
—
—
—
—
—
89
ns
ns
TPA, TPB cable inputs,
200 Mbits/s operation
0.5
TPA, TPB cable inputs,
400 Mbits/s operation
—
0.315 ns
Between TPA and TPB cable inputs,
100 Mbits/s operation
—
0.8
0.55
0.5
ns
ns
Between TPA and TPB cable inputs,
200 Mbits/s operation
—
Between TPA and TPB cable inputs,
400 Mbits/s operation
—
ns
Positive Arbitration
Comparator Input
Threshold Voltage
—
VTH+
168
mV
Negative Arbitration
Comparator Input
Threshold Voltage
—
VTH−
–168
—
–89
mV
Speed Signal Input
Threshold Voltage
200 Mbits/s
400 Mbits/s
VTH—S200
VTH—S400
IO
45
266
–5
—
—
—
—
—
139
445
2.5
mV
mV
mA
V
Output Current
TPBIAS outputs
At rated I/O current
—
TPBIAS Output Voltage
VO
1.665
—
2.015
76
Current Source for
Connect Detect Circuit
ICD
µA
* For a node that does not source power (see Section 4.2.2.2 in IEEE 1394-1995 Standard).
Agere Systems Inc.
15
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Electrical Characteristics (continued)
Table 4. Driver Characteristics
Parameter
Test Conditions
Symbol
Min
Typ
Max
Unit
Differential Output Voltage
56 Ω±load
VOD
VOFF
IDIFF
172
—
—
—
—
265
20
mV
mV
mA
Off-state Common-mode Voltage
Drivers disabled
Driver Differential Current,
TPA+, TPA−, TPB+, TPB−
Driver enabled,
speed signaling off*
−1.05
1.05
Common-mode Speed Signaling
Current, TPB+, TPB−
200 Mbits/s speed
signaling enabled†
ISP
ISP
−2.53
−8.1
—
—
−4.84
−12.4
mA
mA
400 Mbits/s speed
signaling enabled†
* Limits are defined as the algebraic sum of TPA+ and TPA− driver currents. Limits also apply to TPB+ and TPB− as the algebraic sum of driver
currents.
† Limits are defined as the absolute limit of each of TPB+ and TPB− driver currents.
16
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Electrical Characteristics (continued)
Table 5. Device Characteristics
Parameter
Supply Current:
Test Conditions
Symbol
Min
Typ
Max
Unit
VDD = 3.3 V
One Port Active
All Ports Active
No Ports Active, (Microlow-
power Sleep Mode) LPS = 0
PD = 1
IDD
IDD
IDD
—
—
—
54
74
50
—
—
—
mA
mA
µA
IDD
VOH
VOL
VIH
VIL
II
—
VDD – 0.4
—
50
—
—
—
—
—
—
—
µA
V
High-level Output Voltage
Low-level Output Voltage
High-level Input Voltage
Low-level Input Voltage
IOH max, VDD = min
IOL min, VDD = max
CMOS inputs
0.4
V
0.7 VDD
—
—
V
CMOS inputs
0.2 VDD
32
V
Pull-up Current,
/RESET Input
VI = 0 V
11
µA
Powerup Reset Time,
/RESET Input
VI = 0 V
—
—
2
—
—
—
—
—
1.4
16
12
ms
V
Rising Input Threshold Voltage
/RESET Input
VIRST
1.1
–16
–12
Output Current
SYSCLK
Control, data
IOL/IOH
@ TTL
mA
mA
IOL/IOH
@ CMOS
CNA
IOL/IOH
IOL/IOH
II
–16
–2
—
—
—
16
2
mA
mA
µA
C/LKON
Input Current,
LREQ, LPS, PD, SE, SM,
PC[0:2] Inputs
VI = VDD or 0 V
—
°± 1
Off-state Output Current,
CTL[0:1], D[0:7], C/LKON I/Os
VO = VDD or 0 V
IOZ
VTH
VIT+
VIT−
—
—
7.5
—
—
—
—
—
—
—
°± 5
8.5
µA
V
Power Status Input Threshold
Voltage, CPS Input
400 kΩ resistor
Rising Input Threshold Voltage*,
LREQ, CTLn, Dn
—
VDD/2 + 0.3
VDD/2 – 0.8
250
VDD/2 + 0.8
VDD/2 – 0.3
550
V
Falling Input Threshold Voltage*,
LREQ, CTLn, Dn
—
V
Bus Holding Current,
LREQ, CTLn, Dn
VI = 1/2(VDD)
µA
V
Rising Input Threshold Voltage
LPS
—
—
VLIH
VLIL
—
0.24 VDD + 1
—
Falling Input Threshold Voltage
LPS
0.24 VDD + 0.2
V
* Device is capable of both differentiated and undifferentiated operation.
Agere Systems Inc.
17
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Timing Characteristics
Table 6. Switching Characteristics
Symbol
Parameter
Jitter, Transmit
Measured
Test Conditions Min
Typ Max Unit
—
—
TPA, TPB
—
—
—
—
—
—
0.15
ns
ns
Transmit Skew
Between
TPA and TPB
± 0.1
tr
tf
Rise Time, Transmit (TPA/TPB)
Fall Time, Transmit (TPA/TPB)
10% to 90%
90% to 10%
50% to 50%
50% to 50%
50% to 50%
RI = 56 Ω,±
—
—
6
—
—
—
—
—
1.2
1.2
—
—
6
ns
ns
ns
ns
ns
CI = 10 pF
RI = 56 Ω,±
CI = 10 pF
tsu
th
td
Setup Time,
Dn, CTLn, LREQ↑↓ to SYSCLK↑
See Figure 6.
See Figure 6.
See Figure 7.
Hold Time,
Dn, CTLn, LREQ↑↓ from SYSCLK↑
0
Delay Time,
1
SYSCLK↑ to Dn, CTLn↑↓
Table 7. Clock Characteristics
Parameter
Symbol
Min
Typ
Max
Unit
MHz
External Clock Source Frequency
f
24.5735
24.5760
24.5785
18
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Timing Waveforms
SYSCLK
th
tsu
Dn, CTLn, LREQ
5-6017.a (F)
Figure 6. Dn, CTLn, and LREQ Input Setup and Hold Times Waveforms
SYSCLK
td
Dn, CTLn
5-6018.a (F)
Figure 7. Dn, CTLn Output Delay Relative to SYSCLK Waveforms
Agere Systems Inc.
19
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Internal Register Configuration
The PHY register map is shown below in Table 8. (Refer to IEEE 1394a-2000, 5B.1 for more information).
Table 8. PHY Register Map for the Cable Environment
Address
Contents
Bit 3 Bit 4
Bit 0
RHB
Bit 1
Bit 2
Bit 5
Bit 6
R
Bit 7
PS
00002
00012
00102
00112
01002
01012
01102
01112
10002
Physical_ID
IBR
Extended (7)
Max_speed
Contender
ISBR
Gap_count
Total_ports
Delay
Pwr_class
Timeout Port_event Enab_accel Enab_multi
XXXXX
XXXXX
Jitter
LCtrl
Watchdog
Loop
Pwr_fail
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
Page_select
Port_select
XXXXX
Register 0 Page_select
11112
Register 7 Page_select
REQUIRED
RESERVED
XXXXX
The meaning of the register fields within the PHY register map are defined by Table 9 below. Power reset values
not specified are resolved by the operation of the PHY state machines subsequent to a power reset.
Table 9. PHY Register Fields for the Cable Environment
Field
Size Type Power Reset
Value
Description
Physical_ID
6
r
000000
The address of this node determined during self-identification. A
value of 63 indicates a malconfigured bus; the link will not transmit
any packets.
R
1
1
1
r
r
0
—
0
When set to one, indicates that this node is the root.
Cable power active.
PS
RHB
rw
Root Hold-off Bit. When set to one, the force_root variable is
TRUE, which instructs the PHY to attempt to become the root dur-
ing the next tree identify process.
IBR
1
rw
0
Initiate Bus Reset. When set to one, instructs the PHY to set ibr
TRUE and reset_time to RESET_TIME. These values in turn
cause the PHY to initiate a bus reset without arbitration; the reset
signal is asserted for 166±µs. This bit is self-clearing.
Gap_count
Extended
6
3
rw
r
3F16
7
Used to configure the arbitration timer setting in order to optimize
gap times according to the topology of the bus. See Section 4.3.6
of IEEE Standard 1394a-2000 for the encoding of this field.
This field has a constant value of seven, which indicates the
extended PHY register map.
20
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Internal Register Configuration (continued)
Table 9. PHY Register Fields for the Cable Environment (continued)
Field
Size Type Power Reset Value
Description
Total_ports
4
r
2
The number of ports implemented by this PHY. This count
reflects the number.
Max_speed
3
r
0102
Indicates the speed(s) this PHY supports:
0002 = 98.304 Mbits/s
0012 = 98.304 and 196.608 Mbits/s
0102 = 98.304, 196.608, and 393.216 Mbits/s
0112 = 98.304, 196.608, 393.216, and 786.43 Mbits/s
1002 = 98.304, 196.608, 393.216, 786.432, and
1,572.864 Mbits/s
1012 = 98.304, 196.608, 393.216, 786.432, 1,572.864, and
3,145.728 Mbits/s
All other values are reserved for future definition.
Delay
LCtrl
4
1
r
0000
1
Worst-case repeater delay, expressed as 144 + (delay * 20) ns.
rw
Link Active. Cleared or set by software to control the value of
the L bit transmitted in the node’s self-ID packet 0, which will be
the logical AND of this bit and LPS active.
Contender
1
rw
See description.
Cleared or set by software to control the value of the C bit
transmitted in the self-ID packet. Powerup reset value is set by
C/LKON pin.
Jitter
3
3
r
000
The difference between the fastest and slowest repeater data
delay, expressed as (jitter + 1) * 20 ns.
Pwr_class
rw
See description.
Power-Class. Controls the value of the pwr field transmitted in
the self-ID packet. See Section 4.3.4.1 of IEEE Standard
1394a-2000 for the encoding of this field. PC0, PC1, and PC2
pins set up power reset value.
Watchdog
ISBR
1
1
rw
rw
0
0
When set to one, the PHY will set Port_event to one if resume
operations commence for any port.
Initiate Short (Arbitrated) Bus Reset. A write of one to this bit
instructs the PHY to set ISBR true and reset_time to
SHORT_RESET_TIME. These values in turn cause the PHY to
arbitrate and issue a short bus reset. This bit is self-clearing.
Loop
1
1
rw
rw
0
1
Loop Detect. A write of one to this bit clears it to zero.
Pwr_fail
Cable Power Failure Detect. Set to one when the PS bit
changes from one to zero. A write of one to this bit clears it to
zero.
Timeout
1
1
rw
rw
0
0
Arbitration State Machine Timeout. A write of one to this bit
clears it to zero (see MAX_ARB_STATE_TIME).
Port_event
Port Event Detect. The PHY sets this bit to one if any of con-
nected, bias, disabled, or fault change for a port whose
Int_enable bit is one. The PHY also sets this bit to one if
resume operations commence for any port and Watchdog is
one. A write of one to this bit clears it to zero.
Agere Systems Inc.
21
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Internal Register Configuration (continued)
Table 9. PHY Register Fields for the Cable Environment (continued)
Field
Size Type Power Reset
Value
Description
Enab_accel
1
rw
0
Enable Arbitration Acceleration. When set to one, the PHY will
use the enhancements specified in Section 4.4 of 1394a-2000
specification. PHY behavior is unspecified if the value of
Enab_accel is changed while a bus request is pending.
Enab_multi
Page_select
1
3
rw
rw
0
Enable Multispeed Packet Concatenation. When set to one, the
link will signal the speed of all packets to the PHY.
000
Selects which of eight possible PHY register pages are accessible
through the window at PHY register addresses 10002 through
11112, inclusive.
Port_select
4
rw
000
If the page selected by Page_select presents per-port information,
this field selects which port’s registers are accessible through the
window at PHY register addresses 10002 through 11112, inclusive.
Ports are numbered monotonically starting at zero, p0.
The port status page is used to access configuration and status information for each of the PHY’s ports. The port is
selected by writing zero to Page_select and the desired port number to Port_select in the PHY register at address
01112. The format of the port status page is illustrated by Table 10 below; reserved fields are shown shaded. The
meanings of the register fields with the port status page are defined by Table 11.
Table 10. PHY Register Page 0: Port Status Page
Address
Contents
Bit 3 Bit 4
Bit 0
Bit 1
Bit 2
Bit 5
Bit 6
Bias
Bit 7
10002
10012
10102
10112
11002
11012
11102
11112
AStat
Negotiated_speed
BStat
Int_enable
Child
Fault
Connected
Disabled
XXXXX XXXXX XXXXX
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
REQUIRED
RESERVED
XXXXX
22
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Internal Register Configuration (continued)
The meaning of the register fields with the port status page are defined by Table 11 below.
Table 11. PHY Register Port Status Page Fields
Field
Size Type Power Reset
Value
Description
TPA line state for the port:
AStat
2
r
—
002 = invalid
012 = 1
102 = 0
112 = Z
BStat
Child
2
1
r
r
—
0
TPB line state for the port (same encoding as AStat).
If equal to one, the port is a child; otherwise, a parent. The
meaning of this bit is undefined from the time a bus reset is
detected until the PHY transitions to state T1: Child Hand-
shake during the tree identify process (see Section 4.4.2.2 in
IEEE Standard 1394-1995).
Connected
Bias
1
1
1
3
r
r
0
0
If equal to one, the port is connected.
If equal to one, incoming TPBIAS is detected.
If equal to one, the port is disabled.
Disabled
rw
r
0
Negotiated_speed
000
Indicates the maximum speed negotiated between this PHY
port and its immediately connected port; the encoding is the
same as for the PHY register Max_speed field.
Int_enable
Fault
1
1
rw
rw
0
0
Enable Port Event Interrupts. When set to one, the PHY
will set Port_event to one if any of connected, bias, disabled,
or fault (for this port) change state.
Set to one if an error is detected during a suspend or resume
operation. A write of one to this bit clears it to zero.
Agere Systems Inc.
23
FW802B Low-Power PHY IEEE 1394A-2000
Two-Cable Transceiver/Arbiter Device
Data Sheet, Rev. 3
May 2004
Internal Register Configuration (continued)
The vendor identification page is used to identify the PHY’s vendor and compliance level. The page is selected by
writing one to Page_select in the PHY register at address 01112. The format of the vendor identification page is
shown in Table 12; reserved fields are shown shaded.
Table 12. PHY Register Page 1: Vendor Identification Page
Address
Contents
Bit 3 Bit 4
Compliance_level
Bit 0
Bit 1
Bit 2
Bit 5
Bit 6
Bit 7
10002
10012
10102
10112
11002
11012
11102
11112
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX
Vendor_ID
Product_ID
REQUIRED
RESERVED
XXXXX
The meaning of the register fields within the vendor identification page are defined by Table 13.
Table 13. PHY Register Vendor Identification Page Fields
Field
Size Type
Description
Compliance_level
8
r
r
r
Standard to which the PHY implementation complies:
0 = not specified
1 = IEEE 1394a-2000
Agere’s FW802B compliance level is 1.
All other values reserved for future standardization.
Vendor_ID
Product_ID
24
24
The company ID or organizationally unique identifier (OUI) of the manufacturer
of the PHY. Agere’s vendor ID is 00601D16. This number is obtained from the
IEEE registration authority committee (RAC). The most significant byte of
Vendor_ID appears at PHY register location 10102 and the least significant at
11002.
The meaning of this number is determined by the company or organization that
has been granted Vendor_ID. Agere’s FW802B product ID is 08020116. The
most significant byte of Product_ID appears at PHY register location 11012 and
the least significant at 11112.
The vendor-dependent page provides access to information used in manufacturing test of the FW802B.
24
Agere Systems Inc.
FW802B Low-Power PHY IEEE 1394A-2000
Data Sheet, Rev. 3
May 2004
Two-Cable Transceiver/Arbiter Device
Outline Diagrams
64-Pin TQFP
Dimensions are in millimeters
.
12.00 ± 0.20
10.00 ± 0.20
PIN #1
1.00 REF
IDENTIFIER ZONE
64
49
0.25
GAGE PLANE
SEATING PLANE
0.45/0.75
1
48
DETAIL A
10.00
± 0.20
12.00
± 0.20
16
33
0.106/0.200
17
32
0.19/0.27
DETAIL A
DETAIL B
M
0.08
1.40 ± 0.05
DETAIL B
1.60 MAX
SEATING PLANE
0.08
0.05/0.15
0.50 TYP
5-3080 (F)
Ordering Information
Device Code
Package
Comcode
FW802B-DB
64-Pin TQFP
700032322
700067297
L-FW802B-DB
64-Pin TQFP (lead-free)*
* In an effort to better serve its customers and the environment, Agere is switching to lead-free packaging on this product (no intentional
addition of lead).
Agere Systems Inc.
25
1394 is a trademark and IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
The FireWire logo is a trademark and FireWire is a registered trademark of Apple Computer, Inc.
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
http://www.agere.com
E-MAIL:
docmaster@agere.com
N. AMERICA: Agere Systems Inc., Lehigh Valley Central Campus, Room 10A-301C, 1110 American Parkway NE, Allentown, PA 18109-9138
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA:
Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon
Tel. (852) 3129-2000, FAX (852) 3129-2020
CHINA: (86) 21-54614688 (Shanghai), (86) 755-25881122 (Shenzhen)
JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 6778-8833, TAIWAN: (886) 2-2725-5858 (Taipei)
Tel. (44)1344 296 400
EUROPE:
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
Agere is a registered trademark of Agere Systems, Inc. Agere Systems and the Agere logo are trademarks of Agere Systems Inc.
Copyright © 2004 Agere Systems Inc.
All Rights Reserved
May 2004
DS02-355CMPR-3 (Replaces DS02-355CMPR-2)
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