CR0603-16W-1004F [SILICON]
Evaluation Board Rev 5.0 for the Si2493/57/34/15/04; 评估板5.0版本的Si2493 / 57 /34/ 15/ 04型号: | CR0603-16W-1004F |
厂家: | SILICON |
描述: | Evaluation Board Rev 5.0 for the Si2493/57/34/15/04 |
文件: | 总36页 (文件大小:684K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Si2493/57/34/15/04
Global ISOmodem-EVB
Evaluation Board Rev 5.0 for the Si2493/57/34/15/04
ISOmodem with UART and SPI Interfaces
A direct access header (J103) is available on the
motherboard to bypass the RS-232 transceivers and
connect the Si2493/57/34/15/04 ISOmodem directly to
a target system.
Description
The global Si2493/57/34/15/04-EVB evaluation board
Rev 5.0 provides the system designer an easy way of
evaluating the Si2493/57/34/15/04 ISOmodem . The
®
An on-board rectifier, filter, and voltage regulator allow
the power input to be 7.5–13 V ac or dc (either polarity)
supplied through a screw terminal (J8) or a standard
2 mm power jack (J9). Alternatively, power can be
supplied through the USB interface (whether the USB or
RS232 interface is used). The evaluation board can
drive an external speaker for call monitoring or the
speaker mounted directly on the board. Please note that
the PCM interface, parallel interface, and EEPROM are
available on the 24-pin FT only. See "1.7.EVB Part
Numbers" on page 8 for ISOmodem EVB options.
Si2493/57/34/15/04-EVB consists of a motherboard
with a power supply, an RS-232 and USB interface,
other ease-of-use features, and a complete removable
modem module on a daughter card. (A functional block
diagram of the Si2493/57/34/15/04-EVB is shown
below.) The Si2493/57/34/15/04 ISOmodem is a
complete controller-based modem chipset with an
integrated
and
programmable
direct
access
arrangement (DAA) that meets global telephone line
requirements. Available as a combination of one 16-pin
small line-side device and one 24-pin or 16-pin system-
side device, the Si2493/57/34/15/04 ISOmodem
eliminates the need for a separate DSP data pump,
modem controller, memories, codec, isolation
transformer, relays, opto-isolators, and a 2- to 4-wire
hybrid. The Si2493/57/34/15/04 is ideal for embedded
modem applications due to its small board area,
controller-based architecture, low power consumption,
and global compliance. The Si2493/57/34/15/04-EVB
provides an RJ-11 jack (for interfacing the Si2493/57/
34/15/04-EVB to the phone line), and USB and RS232
serial ports for interfacing to a PC or data terminal. This
allows the ISOmodem to operate as a serial modem for
straightforward evaluation of the Si2493/57/34/15/04. To
evaluate the Si2493/57/34/15/04 ISOmodem in an
embedded system, the daughter card can be used
independently of or with the motherboard.
Features
The Si2493/57/34/15/04-EVB includes the following:
Dual RJ-11 connection to phone line
RS-232 and USB interface to PC
Speaker for call monitoring
Direct access to Si2493/57/34/15/04 for embedded
application evaluation
Easy power connection to common 7.5 V–13.5 V
power supplies or USB port.
9 V ac adaptor
Simple installation and operation
EEPROM (24-pin FT only)
RS232 lines status display on LEDs.
Functional Block Diagram
Audio
Out
7.5-13.5 V dc or
peak ac Adaptor
Audio
Amplifier
Rectifier
Filter
Voltage
Regulator
Direct
Access HDR
3.3 V
Daughter Board Boundary
5 V
USB
Connector
USB I/F
Phone
line
AOUT
Interface
Selection
Jumpers
Interface
Circuit
Si2493/57/34/15/04
Si3018*
RJ-11
UART
RS-232
Transceivers
DB9
RESET XTALO XTALI
Push Button
Reset
Power-On
Reset
*Si3010 for Si2404
Rev. 0.7 4/11
Copyright © 2011 by Silicon Laboratories
Si2493/57/34/15/04-EVB
Si2493/57/34/15/04
Global ISOmodem-EVB
1.3. Motherboard and Daughter Card
Configuration
1. Si2493/57/34/15/04-EVB Setup and
Evaluation
The EVB consist of a motherboard that takes a plug in
daughter card. The motherboard can be configured in a
variety of ways that are explained below and are
managed via jumpers. The daughter card contains both
the modem system side and the isolated line interface
(DAA).
This section explains how to set up the Si2493/57/34/
15/04-EVB for evaluation as an RS-232 or USB
interface modem. Jumper settings, power connection,
PC/terminal connections, and terminal program
configuration settings are given. The initial modem
setup after power is applied as well as a basic tutorial
on modem operation are provided. Si2493/57/34/15/04-
EVB configurations for evaluating additional features
are discussed separately. See the Si2493/57/34/15 or
Si2404 data sheets and “AN93: Si2493/57/34/15/04/04
Modem Designer’s Guide” for complete details.
The daughter card comes preconfigured and functional
although the user may decide to change some
operating options such as the type of crystal used with
the modem chip or the type of control signals used, i.e.
UART vs parallel. These features must be managed by
changing strapping resistors soldered down to the
daughter card and by changing parts associated with
the crystal. These possible changes are explained
below.
1.1. Si2493/57/34/15/04-EVB Quick Start—
RS-232 Interface
1. Set jumpers according to Figure 1, but change J6 to the
arrangement shown in Figure 3 if an FS ISOmodem
package is used.
1.3.1. Motherboard Configuration
Check all the jumper setting on the S2493/57/34/15/04-
EVB before applying power. The standard factory
setting for the modem in a 24-pin FT package are
shown in the figure below. This setup configures the
modem for RS232 serial operation with autobaud
enabled. Any standard terminal program configured to
communicate through a PC com port can be used to
communicate with the EVB.
2. Connect:
DB-9 to PC COM 1 (with a pass-through cable).
RJ-11 to phone line or CO simulator.
9 V ac adaptor (or USB cable).
3. Bring up:
Turn on power to modem.
Autobaud automatically adjusts modem DTE speed and
protocol.
Figure 1 shows the default motherboard setup for the
FT package daughter card as well as the functions of
connectors and jumpers.
4. Type “AT” followed by a carriage return.
Should echo “AT” and then an “OK”.
1.2. Si2493/57/34/15/04-EVB Quick Start—
USB Interface
1. Set jumpers according to Figure 3, but change J6 to the
arrangement shown in Figure 3 if an FS ISOmodem
package is used.
2. Connect:
USB cable to PC
RJ-11 to phone line or CO simulator
3. Download USB driver for your operating system from the
CD supplied with the evaluation board.
4. Install driver.
5. Bring up.
Reset the modem.
Autobaud automatically adjusts modem DTE speed and
protocol.
6. Type “AT” followed by a carriage return.
Should echo “AT” and then an “OK”.
2
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Rev. 0.7
3
Si2493/57/34/15/04
Global ISOmodem-EVB
1.3.1.1. RS232 vs USB vs User Provided IO
Selection
Various modem control lines can be rearranged
depending on the user preferences and the specific
modem chips used. This is done using JP6. The basic
two JP6 configurations are shown in the following
figures.
To change to USB operation simply move the RS232
selection jumper on JP23 to the USB position as
marked on the PCB and shown in Figure 1. When the
USB vs UART settings are changed the appropriate
indicator LED will light up on the EVB.
J6
If neither jumper is in place then neither serial port will
be activated and the user must provide I/O signals via
the pins on J103. This IO can be in ASYNCH SERIAL,
SPI SERIAL and Parallel Bus mode.
3
6
1
4
1.3.1.2. Autobaud Control
7
10
13
9
Autobaud is enabled with no jumper at the JP34
position. When a jumper is in place, autobaud is
disabled and the user must setup the host to run 19k2
baud in order to use the modem.
12
15
1.3.1.3. EEPROM Control
Figure 2. Default J6 Setup for 24-Pin Modem
Chips
To enable the EEPROM (U5) both jumpers JP34 and
JP35 must be in place and the modem reset.
JP35 physically connects the EEPROM chips select
line to the modem and allows the EEPROM to function
when addressed by the modem, while JP34 connects a
strapping option to the correct modem pin which is
sensed during reset and instructs the modem firmware
to use the EEPROM.
J6
3
6
1
4
1.3.1.4. Call Progress Configuration
7
10
13
9
The modem call establishment can be heard by
enabling the call progress feature via software (see
AN93) and Hardware. The hardware components
include installing JP12 which enabled the audio power
amplifier and installing JP14 to connect the on board
speaker to the power amplifier output. If an offboard
speaker is to be used then JP14 can be removed and
the alternate speaker can be connected to pins 1 and 4
of JP11. Note the this audio output is 8 and
differential so that neither output pin should be
grounded.
12
15
Figure 3. Default J6 Setup for 16-Pin Modem
Chips
The specific details of what the jumpers connect are
shown in Table 1, which is also found printed on the
underside of the EVB.
1.3.1.5. Control Line Configuration
Table 1. Routing of Control Signals with Jumper Position on J6
RS232
Si24xx 24-Pin
Si24xx 16-Pin
Si2401
Signal
Left
Right
Left
Right
Left
Right
DCD
RI
DCD
RI
SDI/EESD
FSYNCH
RI
DCD
NC
NC
RI
DCD
NC
NC
RI
DTR
RTS
ESC
RTS
ESC
NC
NC
RTS
ESC
NC
NC
SDO/
GPIO1
EECLK
DSR
INT
AOUT/INT
NC
INT
NC
AOUT/INT
4
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
1.3.2. Daughter Card Configuration
The daughter card comes configured with either a 24-
pin FT or 16-pin FS system side part and either 32 kHz
or 4.9152 MHz operation, and UART operation. The
daughter card can also be setup to operate with a third
clock frequency, an on board 27 MHz oscillator. To
change between these options requires component
changes on the daughter card.
The daughter card can also operate in three possible
interface modes: parallel bus mode, in SPI mode as well
as the default UART mode.
There are six small (0402) strapping resistors (R101 to
R106) that are on the daughter card and are configured
differently depending on the combination of chip
package, clock frequency chosen, and interface mode.
See Figures 5 and 6 for details.
The card and its options are shown in Figure 4, which
shows the Modem Daughter card Rev 2.0 top and
bottom views with the critical parts that may be changed
to select another command mode (i.e. SPI) or an
alternate crystal frequency, such as 4.9152 MHz.
Rev. 0.7
5
Si2493/57/34/15/04
Global ISOmodem-EVB
Three possible crystals or ext oscillator.
TOP VIEW
These option strapping resistors select
modem command mode UART, SPI or
Parallel and crystal clock frequency.
BOTTOM VIEW
Crystal loading caps (C40 & C41)
specific to the crystal type used.
Figure 4. Modem Daughter Card Rev 2.0 Top and Bottom Views
Figure 5. R101–R106 Setup for Clock and Mode Configuration on the DC with the 16-Pin FS
Package
6
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Figure 6. R106 Setup for Clock and Mode Configuration on DC with 24-Pin FT Package
1.3.2.1. 32 kHz Setup
Table 2. Signal Usage
For 32 kHz, populate Y1 with the 32 kHZ crystal shown
in the BOM and use 18 pF capacitors for the C40/C41
values. Also remove Y3 and Y1b if present and strap
R101 to R106 as shown in Figure 5.
SPI Function
JP23 Pin Number
Legacy Pin
Function
SPI_CSb
SPI_MISO
SPI_MOSI
SPI_SCLK
5
7
RTSb
RXD
TXD
The modem should then work as expected; no changes
are needed on the motherboard
9
1.3.2.2. 4.9152 MHz
11
CTSb
For 4.9152 MHz, populate Y1b with the 4.9152 MHz
crystal shown in the BOM and use 33 pF capacitors for
the C40 and C41 values. Also remove Y3 and Y1 if
present and strap R101 to R106 as shown in Figures 5
or 6 above.The modem should then work as expected;
no changes are needed on the motherboard
1.3.3. Parallel Bus Mode Setup
To change to parallel bus mode setup it is necessary to
configure the R101 straps as shown in Figure 5 or
Figure 6, according to the package and clock used.
Then setup the daughter card with neither UART nor
USB operation selected, i.e. with no jumper on JP23.
The SPI signals can then be obtained on J103, the
system connector and connected to the host. See the
data sheet and schematic for signal and pin usage.
1.3.2.3. 27 MHz
For 27 MHz, populate Y3 with the small surface mount
oscillator shown in the BOM and remove Y3 and Y1b if
present. Also remove any capacitors at the C40 and
C41 positions.
1.4. Power Requirements
Strap R101 to R106 as shown in Figures 5 or 6 above.
The Si2493/57/34/15/04-EVB has an on-board diode
bridge, filter capacitor, and voltage regulator (U10 and
U18). Power can be supplied from any source capable
of providing 7.5 V–13 V dc or 7.5 V–13 V peak ac and
The modem should then work as expected; no changes
are needed on the motherboard
1.3.2.4. SPI Mode Setup
To change to SPI mode setup it is necessary to at least 100 mA. (Additional current may be required if a
configure the R101 straps as shown in Figure 5 or speaker is connected for monitoring call progress
Figure 6, according to the package and clock used. tones.) Power may be applied to the Si2493/57/34/15/
Then setup the daughter card with neither UART nor 04-EVB through the screw terminals (J8), the 2 mm
USB operation selected, i.e. with no jumper on JP23. power jack (J9), or the USB cable (even if the modem is
The SPI signals can then be obtained on J103, the configured for RS-232 operation). The onboard full-
system connector and connected to the host. Signal wave rectifier and filter ensure the correct polarity is
usage is described in Table 2.
applied to the Si2493/57/34/15/04-EVB. Daughter card
current can be measured by connecting a DVM across
R59, a 1 resistor using the supplied test points on
Rev. 0.7
7
Si2493/57/34/15/04
Global ISOmodem-EVB
either side.
the data mode. After the ATO command, the modem
resumes the data connection and no longer accepts AT
commands.
1.5. Terminal and Line Connections
The Si2493/57/34/15/04 can be tested as a standard
serial data modem by connecting the Si2493/57/34/15/
04-EVB to a personal computer or other data terminal
equipment (DTE), phone line, and power. Connect a PC
serial port to the DB9 connector on the Si2493/57/34/
15/04-EVB with a pass-through cable. The RS-232
transceivers on the EVB can communicate with the DTE
at rates up to 1 Mbps. Any standard terminal program,
such as HyperTerminal or ProComm, running on a PC
communicates with the Si2493/57/34/15/04-EVB. The
standard factory jumper configuration has autobaud
enabled. Autobaud detects the DTE speed, data length,
parity, and number of stop bits.
1.7. EVB Part Numbers
The ISOmodem evaluation boards are offered in
multiple speeds and packaging options. The first four
numbers indicate the system-side device. The next two
letters indicate the system-side package (FS–Lead-free,
16-pin SOIC; FT–Lead-free, 24-pin TSSOP). The final
two numbers indicate the line-side device. See Figure 7.
Si2457-D-FS18-EVB
LS Part Number (Si30xx)
SS Package
If JP33 is installed, autobaud is disabled. Configure the
terminal emulation program to 19200 bps, eight data
bits, no parity, one stop bit, and hardware (CTS)
handshaking. Connect the RJ-11 jack on the Si2493/57/
34/15/04-EVB to an analog phone line or telephone line
simulator, such as a Teltone TLS 5.
SS Revision
SS Part Number
Figure 7. EVB Part Number Example
2. Si2493/57/34/15/04-EVB
Functional Description
1.6. Making Connections
The Si2493/57/34/15/04-EVB is
a
multipurpose
With the terminal program properly configured and
running, apply power to the Si2493/57/34/15/04-EVB.
Type “AT<cr>”, and the modem should return “OK”
indicating the modem is working in the command mode
and communicating with the terminal. If the “OK”
response is not received, try resetting the modem by
pressing the manual reset switch (S1); then, again type
“AT<cr>.” Next, type “ATI6<cr>.” The modem should
respond with “2493”, “2457”, “2434”, “2415”, or “2404”
indicating the terminal is communicating with an Si2493,
Si2457, Si2434, Si2415, or Si2404.
evaluation system. The modem daughter card
illustrates the small size and few components required
to implement an entire controller-based modem with
global compatibility. The daughter card can be used
independently of, or in conjunction with, the
motherboard. The motherboard adds features that
enhance the ease of evaluating the many capabilities of
®
the Si2493/57/34/15/04 ISOmodem .
2.1. Motherboard
The motherboard provides a convenient interface to the
Si2493/57/34/15/04 DC (daughter card). The versatile
power supply allows for a wide range of ac and dc
voltages to power the board. RS-232 transceivers and a
DB9 connector allow the Si2493/57/34/15/04-EVB to be
easily connected to a PC or other terminal device.
Jumper options allow direct access to the LVCMOS/TTL
level serial inputs to the Si2493/57/34/15/04, bypassing
the RS-232 transceivers or USB interface. This is
particularly useful for directly connecting the Si2493/57/
34/15/04 to embedded systems.
Type “ATS0=2<cr>” to configure the modem to answer
on the second ring.
To take the modem off-hook, type “ATH1<cr>.” The
modem should go to the off-hook state, draw loop
current, and respond with an “OK.” Next, type
“ATH<cr>” or “ATH0<cr>”, and the modem should hang
up (go on-hook) and stop drawing loop current.
To make a modem connection, type “ATDT(called
modem phone number)<cr>.” Once the connection is
established, a “CONNECT” message appears indicating
the two modems are in the data mode and
communicating. Typing on one terminal should appear
on the other terminal. To return to the command mode
without interrupting the connection between the two
modems, type “+++.” Approximately two seconds later,
“OK” appears. The modem is now in command mode
and accepts “AT” commands.Type “ATH” (or “ATH0”) to
terminate the data connection, or type “ATO” to return to
The Si24xxURT-EVB motherboard connects to the
daughter card through two connectors, JP101 and JP2.
JP101 is an 8x2 header providing connection to all
Si2493/57/34/15/04 digital signals and regulated 3.3 V
power for the Si2493/57/34/15/04. The Si2493/57/34/
15/04 digital signals appearing at JP101 (daughter card
interface) are LVCMOS and TTL compatible. JP2 is a
4x1 socket providing connection between the daughter
8
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
card and the RJ-11 phone jack.
2.1.5. EEPROM Enable (FT Only)
2.1.1. Voltage Regulator/Power Supply
Connecting JP34 and JP35 enables the optional
EEPROM, U5. See “AN93: Si2457/Si2434/Si2415/
Si2404 Modem Designer’s Guide” for programming
details.
The input voltage to either J8 or J9 must be between 7.5
and 13.5 V dc or 7.5 and 13.5 V
ac. The
PEAK
motherboard includes a diode bridge (D12) to guard
against a polarity reversal of the dc voltage or to rectify 2.1.6. Interface Selection
an ac voltage. The power source must be capable of
The serial interface of the Si2493/57/34/15/04-EVB can
continuously supplying at least 100 mA. C44 serves as
a filter cap for an ac input. The voltage regulator, U10,
provides 5 V for the motherboard and the input for
voltage regulator U3, which outputs 3.3 V for use on the
motherboard and to power the daughter card. Si24xxDC
power consumption can be measured by placing a
meter across R59. Power is supplied to U2 through D5
from the USB.
be connected to a computer, terminal, embedded
system, or any other data terminal equipment (DTE) via
a standard RS-232 interface, USB interface, or through
a direct TTL serial interface.
The Si2493/57/34/15/04 can be tested as a standard
data modem by connecting the Si2493/57/34/15/04-
EVB to a personal computer or other DTE power supply
and a phone line. A PC can communicate with the
Si2493/57/34/15/04-EVB using a standard terminal
2.1.2. Reset Circuitry
The Si2493/57/34/15/04 requires a reset pulse to program, such as HyperTerm or ProComm.
remain low for at least 5.0 ms after the power supply
has stabilized during the powerup sequence or for at
04-EVB is connected to the DTE.
least 5.0 ms during a power-on reset. Most production
Si2493/57/34/15/04 modem chipset applications require
that RESET be controlled by the host processor. Certain
Jumper settings determine how the Si2493/57/34/15/
2.1.7. RS-232 Interface
This operation mode uses the standard factory jumper
settings illustrated in Figure 1 on page 3. The Maxim
Si2493/57/34/15/04
operation
modes,
including
MAX3237 transceiver interfaces directly with the TTL
levels available at the serial interface of the Si2493/57/
34/15/04 and, using internal charge pumps, makes
these signals compatible with the RS-232 standard. The
RS-232 transceiver on the Si2493/57/34/15/04-EVB can
communicate at rates between 300 bps and 1 Mbps.
This simplifies the connection to PCs and other data
terminal equipment (DTE). The signals available on the
powerdown, require a hardware reset to recover.
The Si2493/57/34/15/04-EVB contains two reset
options, an automatic power-on reset device, U18
(DS1818) (default), and a manual reset switch (S1) to
permit resetting the chip without removing power. A
reset, regardless of the mechanism, causes all modem
settings to revert to factory default values.
2.1.3. Automatic Reset (DS1818)
Si2493/57/34/15/04-EVB
serial
interface
(DB9
The DS1818 is a small, low-cost device that monitors connector) are listed in Table 3.
the voltage on V and an external reset pushbutton. If
D
2.1.8. USB Interface
V
drops below 3.0 V, the DS1818 provides a 220 ms
D
The USB cable connects to J10 on the motherboard
and provides both data and power. Installing a jumper
on JP23 enables the USB interface and disables the
RS-232 interface. The USB interface is provided by
U12. A USB driver for this chip is available for most PC
and MAC operating systems on the CD.
active-low reset pulse. On powerup, the DS1818 also
outputs an active low reset pulse for 220 ms after V
reaches 90% of the nominal 3.3 V value. The DS1818
outputs a 220 ms reset pulse any time the power supply
voltage exceeds the 3.3 V ±10% window.
D
2.1.4. Manual Reset
The manual reset switch (S1) performs a power-on
reset. This resets the Si2493/57/34/15/04 to factory
defaults without turning off power. Pressing S1 activates
the reset monitor in the DS1818 and produces a 220 ms
active low reset pulse.
Rev. 0.7
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Si2493/57/34/15/04
Global ISOmodem-EVB
2.1.9. Direct Access Interface
operation of the modem. See “AN93: Si3457/34/15/04
Modem Designer’s Guide” for more details on the
features controlled by pin strapping.
While the motherboard supplies power through J8, J9,
or USB, power-on reset, and an RJ–11 jack for the
modem, the direct access interface (J103) is used to Since this PWM signal swings rail to rail and is simply
connect the motherboard to an embedded system. J103 filtered by a low pass filter to acquire the audio. It is
provides access to all Si2493/57/34/15/04 signals important to keep the power supply to the modem free
available on the daughter card.
of noise in the audio spectrum.
It is necessary to remove the jumper on JP23 to disable 2.1.11.2. The Audio Output Amplifier (LM4819)
both the RS-232 and USB interface and prevent signal
contention.
The Power amplifier on the EVB is powered by a current
limited 4.2 V supply. The current limit is implemented in
2.1.10. PCM Interface (24-Pin FT Only)
the EVB because it is intended for HW/SW
development and is not needed for a production design.
This amplifier can drive an 8 speaker with 200 mW of
Call progress audio (i.e., ISOmodem's call progress
dialing and negotiation tones).
The Si2493/57/34/15/04 PCM interface can be
demonstrated using the voice motherboard, not with this
EVB.
2.1.11. AOUT Call Progress Audio Output
The power amplifier itself is a low cost, rugged H bridge
type device. There are several pin compatible designs
from multiple vendors that can provide alternate price/
power tradeoffs for this amplifier. This power amp can
be shut down by removing jumper JP12. The signal at
JP12 can also be tied to a control signal to allow the
host to shut down the amplifier. The customer can
change the values of R172 and R173 when integrating
the EVB to his system, but should keep the RC formed
by C37 and R173 at a 50 Hz or higher corner to avoid a
power-on thump.
Call progress audio output is provided by the Si2493/57/
34/15/04 on the AOUT pin as a PWM signal. This signal
allows the user to monitor call progress signals, such as
dial tone, DTMF dialing, ring, busy signals, and modem
negotiation. Control of this signal is provided by AT
commands and register settings described in the
introduction. The AOUT signal is connected to an on
board amplifier, for a high-quality output. AOUT can
also be connected to a summing amplifier or multiplexer
in an embedded application as part of an integrated
audio system.
2.1.11.3. The Call Progress Speaker
2.1.11.1. AOUT Audio Processing
The Call progress speaker, Regal RE-2308-NL is
connected to the amplifier via a jumper, JP14. If another
speaker is to be connected then it is necessary to
remove JP14 and connect the external speaker to JP11,
Pins 1 and 4. It is important to remember that the
speaker signal is differential. Both the output pins are
driven outputs and must not be grounded.
The AOUT signal discussed in this section leaves the
Si2493/57/34/15/04 is processed (demodulated) by a
high pass filter: (R133,134,135, and C24, C25, 26,
C27). It is critically important to not put a dc load on the
AOUT pin since the pin also acts as a modem feature
control on reset and is internally weakly pulled up. Any
unintentional dc load on AOUT prevents proper
Table 3. DB9 Pin Connections
J1 Name
Carrier Detect
J1 Symbol
J1 Pin
Si2493/57/34/15/ Si2493/57/34/15/
04 Pin
See note
9
04 Name
DCD/EESD
RXD
*
CD
RXD
TXD
DTR
SG
1
Received Data
Transmit Data
2
3
10
TXD
Data Terminal Ready
Signal Ground
4*
5
See note
6
ESC/RI
GND
Data Set Ready
Ready to Send
Clear to Send
DSR
RTS
CTS
RD
6*
7*
8
See note
See note
11
INT/AOUT
RTS/RXCLK
CTS
*
Ring Indicator
9
17
RI
*Note: JP6 jumper option.
10
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
2.2. Modem Daughter Card Operation
The Si2493/57/34/15/04URT-EVB daughter card is a
complete modem solution perfectly suited for use in an
embedded system. The daughtercard contains both the
modem system-side chip and the isolated line interface
(DAA).
The daughter card requires a 3.3 V supply capable of
providing at least 35 mA and communicates with the
system via LVCMOS/TTL-compatible digital signals on
JP1. The RJ-11 jack (TIP and RING) is connected via
JP2. Be sure to provide the proper power-on reset pulse
to the daughter card if it is used in the stand-alone
mode.
2.2.1. Reset Requirements
®
The Si2493/57/34/15/04 ISOmodem daughter card
must be properly reset at powerup. The reset pin (pin 8)
of the Si2493/57/34/15/04 (JP103, J101 pin 13) must be
held low for at least 5.0 ms after power is applied and
stabilized to ensure the device is properly reset.
2.2.2. Crystal Requirements
Clock accuracy and stability are important in modem
applications. To ensure reliable communication between
modems, the clock must remain within ±100 ppm of the
design value over the life of the modem. The crystal
selected for use in a modem application must have a
frequency tolerance of less than ±100 ppm for the
combination of initial frequency tolerance, drift over the
normal operating temperature range, and five year
aging. Other considerations, such as production
variations in PC board capacitance and the tolerance of
loading capacitors, must also be taken into account.
2.2.3. Protection
The Si2493/57/34/15/04-EVB meets or exceeds all FCC
and
international
PTT
requirements
and
recommendations for high-voltage surge and isolation
testing without any modification. The protection/isolation
circuitry includes C1, C2, C8, C9, FB1, FB2, and RV1.
The PCB layout is also a key “component” in the
protection circuitry. The Si2493/57/34/15/04-EVB
provides isolation to 3 kV. Contact Silicon Laboratories
for information about designing to higher levels of
isolation.
Rev. 0.7
11
Si2493/57/34/15/04
Global ISOmodem-EVB
3. Design
The following sections contain the schematics, bill of materials, and layout for the Si2493/57/34/15/04 including the
daughter card and motherboard.
D
G N
1 2
D V D 3 . 3
4
3 .
3
V D
3 . 3 V D
D
D
G N
G N
2 1
5
2 0
6
12
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
+
S C
1 1
N D I G
1 5
Rev. 0.7
13
Si2493/57/34/15/04
Global ISOmodem-EVB
4. Bill of Materials: Si24xx Daughter Card
Table 4. Si24xx Daughter Card Bill of Materials
Item Qty
Ref
C1, C2
C3
Value
33 pF
Rating
Voltage
250 V
250 V
50 V
Tol
Type
Y2
PCB Footprint
C1808
Mfr Part Number
SCC1808X330K502T
GRM21BR72E103KW03L
EEE1HS010SR
Mfr
1
2
3
4
5
6
7
8
2
1
1
2
1
2
1
2
Y2
±10%
±10%
±20%
±20%
±20%
±10%
±20%
±5%
Holy Stone
Murata
0.01 µF
1 µF
X7R
C0805
C4
Alum_Elec
X7R
C3.3X3.3MM
C0603
Panasonic
Venkel
C5, C6
C7
0.1 µF
2.7 nF
680 pF
0.01 µF
18 pF
16 V
C0603X7R160-104M
C0603X7R500-272M
SCC1808X681K502T
C0603X7R160-103M
C0603COG500-180J
50 V
X7R
C0603
Venkel
C8, C9
C10
Y2
250 V
16 V
Y2
C1808
Holy Stone
Venkel
X7R
C0603
C40,
C41
50 V
COG
C0603
Venkel
9
3
2
C50,
C52,
C56
0.1 µF
10 V
±20%
X7R
X5R
C0603
C0603
C0603X7R100-104M
C0603X7R6R3-224K
Venkel
Venkel
10
C51,
C53
0.22 µF
6.3 V
±10%
±10%
11
12
13
1
1
3
C54
D1
1 µF
HD04
600
25 V
X5R
BRIDGE
SMT
C0603
MiniDIP4
L0603
C0603X5R250-105K
HD04-T
Venkel
Diodes Inc.
Murata
0.8 A
400 V
FB1,
FB2,
FB5
200 mA
BLM18AG601SN1
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1
1
2
1
2
1
1
1
1
1
2
2
1
1
1
2
J1
J2
SOCKET 8x2
4X1 Header_0
SOCKET
SOCKETX8-100-SMT
CONN1X4-100-SMT
SOT23-BEC
SOT23-BEC
SOT23-BEC
DO-214AA-NP
R2010
SSW-108-22-G-D-VS
TSM-104-01-T-SV
MMBTA42LT1
Samtec
Berg
Q1 Q3
Q2
MMBTA42LT1 200 mA
MMBTA92LT1 100 mA
MMBTA06LT1 500 mA
P3100SB
300 V
300 V
80 V
NPN
On Semi
On Semi
On Semi
Littelfuse
Venkel
Venkel
Venkel
Venkel
Venkel
Venkel
Venkel
Venkel
Venkel
Venkel
PNP
MMBTA92LT1
Q4 Q5
RV1
R1
NPN
MMBTA06LT1
275 V
Sidactor
ThickFilm
ThickFilm
ThickFilm
ThickFilm
ThickFilm
ThickFilm
ThickFilm
ThickFilm
ThickFilm
ThickFilm
P3100SBL
1.07 k
150
1/2 W
1/16 W
1/2 W
1/2 W
1/16 W
1/8 W
1/16 W
1/4 W
1/2 W
1/16 W
±1%
±5%
±1%
±1%
±5%
±5%
±1%
±1%
±1%
±1%
CR2010-2W-1071F
CR0603-16W-151J
CR2010-2W-3651F
CR2010-2W-2491F
CR0603-16W-104J
CR0805-8W-206J
CR0603-16W-1004F
CR1206-4W-5360F
CR2010-2W-73R2F
CR0603-16W-56R2F
R2
R0603
R3
3.65 k
2.49 k
100 k
20 M
1 M
R2010
R4
R2010
R5, R6
R7, R8
R9
R0603
R0805
R0603
R10
R11
536
R1206
73.2
56.2
R2010
R12,
R13
R0603
30
31
2
2
R15,
R16
0
0
1 A
1 A
ThickFilm
ThickFilm
R0603
R0603
CR0603-16W-000
CR0603-16W-000
Venkel
Venkel
R120,
R121
32
33
1
4
R18
1.2 k
10 k
1/10 W
1/10 W
±5%
±5%
ThickFilm
ThickFilm
R0603
R0603
CR0603-10W-121J
CR0603-10W-103J
Venkel
Venkel
R101,
R102,
R103,
R104,
R106
14
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Table 4. Si24xx Daughter Card Bill of Materials (Continued)
Item Qty
Ref
Value
1 k
Rating
1/10 W
1/10 W
Voltage
Tol
Type
PCB Footprint
R0603
Mfr Part Number
CR0603-10W-102J
CR0603-10W-2000J
Mfr
34
35
1
3
R105
±5%
±5%
ThickFilm
ThickFilm
Venkel
Venkel
R110,
R111,
R112
200
R0603
36
37
38
1
1
1
U2
Si3018
Si24xx
300 V
LineSide
SO16N6.0P1.27
TSSOP24N6.4P0.65
16pin SOIC
Si3018-F-GS
Si2493-E-FT
2493
SiLabs
SiLabs
U12
U13
ISOMODEM
Si24xx-16 pin
Silicon
Laboratories
39
40
1
1
Y1B
(Y1, Y3)
32.768 kHz
43 V
XTAL-3X8-LD
SOD-123
ECS–.327–12.5–8X
BZT52C43-7-F
ECS
International
Z1
500 mW
43 V
Zener
Diodes Inc.
Rev. 0.7
15
Si2493/57/34/15/04
Global ISOmodem-EVB
C
V C
D G N
8
4
D
G N
1 0
C
V C
2 0
C
V C
D
G N
C
V C
D G N
1 6
8
1 6
8
16
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
2
1
D
V D
D G N
6
7
2
1
Rev. 0.7
17
Si2493/57/34/15/04
Global ISOmodem-EVB
18
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
1 0 K
R 1 1 0
C
V C
D G N
2 6
2
1 0 K
R 1 0 9
1 0 K
R 1 1 1
1 5 V
D N 8
1 5 V
D N 7
D
V D
D
D
G N
G N
6
E P A D
3
1 5 V
1 5 V
1 5 V
D N 6
D N 5
D N 4
1 5 V
1 5 V
D N 3
D N 2
1 5 V
D N 1
M H
M H
S H
S H
1 1
1 0
5
6
Rev. 0.7
19
Si2493/57/34/15/04
Global ISOmodem-EVB
5. Bill of Materials: Si24xx Motherboard
Table 5. Si24xx Motherboard Bill of Materials
Item Qty
Ref
Value
Rating Voltage Tol
Type
PCB Footprint
Mfr Part Number
Mfr
1
8
C21, C23,
C37, C43,
C54, C55,
C69, C74
1 µF
10 V
±10%
X7R
C0603
C0603X7R100-105K
Venkel
2
17
C24, C25,
C26, C27,
C53, C56,
C57, C58,
C59, C61,
C62, C63,
C71, C72,
C75, C96,
C98
0.1 µF
10 V
±20%
X7R
C0402
C0402X7R100-104M
Venkel
3
4
3
1
C42, C51,
C60
0.01 µF
470 µF
25 V
25 V
±10%
X7R
C0402
C0402X7R250-103K
Venkel
C44
±20% Alum_Ele C10.3X10.3MM EMVE250ADA471MJA0G
c
United
Chemicon
5
6
7
1
2
3
C48
0.1 µF
10 µF
50 V
16 V
16 V
±10%
±10%
±10%
X7R
X5R
X7R
C0603
C0805
C0603
C0603X7R500-104K
C0805X5R160-106K
C0603X7R160-561K
Venkel
Venkel
Venkel
C49, C66
C52, C70,
C73
560 pF
8
9
1
8
C97
1 nF
15 V
100 V ±10%
15 V
X7R
C0603
C0603X7R101-102K
MMBZ15VDLT1G
Venkel
DN1, DN2,
DN3, DN4,
DN5, DN6,
DN7, DN8
225 mW
Zener,
Dual
SOT23-AAK
On Semi
10
11
2
1
D11, D13
D12
STPS140Z
1.0 A
0.8 A
40 V
Schottky
BRIDGE
SOD-123
MiniDIP4
STPS140Z
HD01-T
ST MICRO
Diodes Inc.
Bridge
100 V
Rectifier
12
13
3
D14, D15, MMBD300 225 mA 300 V
DUAL
SOT23-AKC
MMBD3004S-7-F
HSMC-C170
Diodes Inc.
D49
4S-7-F
11
D41, D42,
D43, D44,
D45, D46,
D47, D48,
D50, D52,
D53
RED
25 mA
1.9 V
SMT,
Chip LED
LED-HSMX-
C170
Avago
Technologies
14
15
1
5
D54
BAV23A
400 mA 200 V
DUAL
SMT
SOT23-KKA
L0603
BAV23A
Diodes Inc.
MuRata
FB6, FB7,
FB8, FB9,
FB11
600 Ohm 200 mA
BLM18AG601SN1
16
17
4
4
HW1, HW2,
HW3, HW4
spacer
screw
2397
SPC
Technology
HW5, HW6,
HW7, HW8
NSS-4-4-01
Richco
Plastic Co
20
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Table 5. Si24xx Motherboard Bill of Materials (Continued)
Item Qty
Ref
Value
Rating Voltage Tol
Type
PCB Footprint
Mfr Part Number
Mfr
18
1
JP11
HEADER
4X1
Header
CONN-1X4
TSW-104-07-T-S
Samtec
19
20
2
1
JP12, JP14 JUMPER
Header
Header
CONN-1X2
CONN-1X3
TSW-102-07-T-S
TSW-103-07-T-S
Samtec
Samtec
JP23
HEADER
1x3
21
22
23
24
25
3
1
1
1
1
JP33, JP34, JUMPER
JP35
Unshroud
ed
CONN-1X2
68000-402
MTJG-2-64-2-2-1
TSW-105-07-S-T
1729018
Berg
J5
J6
J8
J9
RJ-11
RJ-11
RJ11-DUAL-
MTJG
ADAM TECH
Samtec
HEADER
5x3
Header
CONN
TRBLK 2
TERM
BLK
CONN-1X2-TB
PHOENIX
CONTACT
Power
Jack
1 A
BARREL CONN-3-PWR
ADC-002-1
Adam Tech
26
27
1
1
J10
J11
DB9
D-SUB
USB
CONN-9-DBF
CONN-USB-B
D09S33E4GX00LF
292304-1
FCI
USB Type
B
Tyco
28
1
J101
HEADER
8x2
Header
Header
CONN2X8
16/80 pins of 9-146252-0- Tyco/AMP
08
29
30
1
1
J102
J103
Socket 1x4
SSW-104-01-T-S
5103309-3
Samtec
Tyco
8X2
Shrouded CONN2X8-4W
Shrouded
Header
31
32
1
7
LS1
SPEAKER 0.5 W
Max
RE-2308-NL
RE-2308-NL
Regal
R31, R40,
R41, R42,
R43, R52,
R109, R110,
R111, R112
10 k
1/10 W
±1% ThickFilm
R0603
R0603
CR0603-10W-1002F
Venkel
33
3
R33, R34,
R35
1 k
1/16 W
±1% ThickFilm
CR0603-16W-1001F
Venkel
34
35
36
37
38
39
40
1
1
1
1
1
2
R48
R57
100 k
0.05
1
1/10 W
1/4 W
±1% ThickFilm
±5% ThickFilm
±1% ThickFilm
±5% ThickFilm
±1% ThickFilm
±5% ThickFilm
±1% ThickFilm
R0603
R0805
R0603
R0603
R0603
R1206
R0603
CR0603-10W-1003F
LCR0805-R050J
Venkel
Venkel
Venkel
Venkel
Venkel
Venkel
Venkel
R59
1/10 W
1/10 W
1/10 W
1/4 W
CR0603-10W-1R00F
CR0603-10W-2000J
CR0603-10W-1331F
CR1206-8W-1R6J
CR0603-10W-6810F
R101
200
1.33 k
1.6
R102
R103, R105
11 R155, R156,
R157, R158,
R159, R160,
R161, R162,
R163, R169,
R170
681
1/10 W
Rev. 0.7
21
Si2493/57/34/15/04
Global ISOmodem-EVB
Table 5. Si24xx Motherboard Bill of Materials (Continued)
Item Qty
Ref
Value
Rating Voltage Tol
Type
PCB Footprint
Mfr Part Number
Mfr
41
3
R172, R173,
R174
20.0 k
1/16 W
±1% ThickFilm
R0603
CR0603-16W-2002F
Venkel
42
43
1
1
R175
S1
0
2 A
ThickFilm
Tactile
R1206
CR1206-4W-000
101-0161-EV
Venkel
SW PUSH- 50 mA 12 Vdc
BUTTON
SW4N6.5X4.5-
PB
Mountain
Switch
44
10
TP5, TP6,
TP16, TP17,
TP19, TP20,
TP21, TP22,
TP23, TP24
BLUE
Loop
TESTPOINT
151-205-RC
Kobiconn
45
4
TP7, TP8,
TP9, TP25
Turret
RED
Turret
TP[12594]
2551-2-00-44-00-00-07-0
Mill-Max
46
47
1
1
TP11
U3
Loop
LDO
TESTPOINT
SOT223
151-207-RC
Kobiconn
LT1963A-
3.3 V
1.5 A
max
LT1963AEST-3.3#PBF
Linear Tech-
nologies
48
49
1
1
U5
EEPROM
32K
Serial
LDO
TSSOP8N6.4P0.
65
25LC320A-I/ST
LM2937ES-5.0
Microchip
Technology
U10
5
0.5 A
max
TO263-3N
National
Semiconduc-
tors
50
51
1
1
U11
U12
MAX3237
CP2102
5.5 V
3.3 V
RS232
MCU
TSSOP
MAX3237EIPWR
CP2102-GM
TI
QFN28N5X5P0.
5
SiLabs
52
53
54
55
2
1
1
1
U13, U14
U18
IDT74CBT
LV3257
TSSOP-16
IDT74CBTLV3257
DS1818-10
IDT
DS1818
10%
SOT-23
Dallas Semi-
conductor
U26
74LCX541
Buffer
TSSOP20N6.4P
0.65
74LCX541MTC
LM4819M
Fairchild
U27
LM4819 350 mW
SO8N6.0P1.27
National
Semiconduc-
tor
Unpopulated Components
56
1
J7
2MM, RT
ANG
SHROUD CONN1X5-S5B-
S5B-PH-SM4-TB
JST
ED
±1% ThickFilm
ThickFilm
PH-SM4-TB
1
1
1
1
R39
10 k
1/10 W
1 A
R0603
CR0603-10W-1002F
CR0603-16W-000
Venkel
Venkel
R108
0
R0603
22
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Rev. 0.7
23
Si2493/57/34/15/04
Global ISOmodem-EVB
24
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Rev. 0.7
25
Si2493/57/34/15/04
Global ISOmodem-EVB
26
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Rev. 0.7
27
Si2493/57/34/15/04
Global ISOmodem-EVB
28
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Rev. 0.7
29
Si2493/57/34/15/04
Global ISOmodem-EVB
30
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
Rev. 0.7
31
Si2493/57/34/15/04
Global ISOmodem-EVB
32
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
6. Complete Design Package on CD
(See Sales Representative for
Details)
Silicon Laboratories can provide a complete design
package of the Si2493/57/34/15/04-EVB including the
following:
OrCad Schematics
Gerber Files
BOM
Documentation
Contact your local sales representative or Silicon
Laboratories
information.
headquarters
sales
for
ordering
Rev. 0.7
33
Si2493/57/34/15/04
Global ISOmodem-EVB
DOCUMENT CHANGE LIST
Revision 0.2 to Revision 0.3
Updated Figure 15, “Daughter Card Secondary Side
Silkscreen,” on page 24.
Updated Figure 16, “Daughter Card Primary Side
Layout,” on page 25.
Updated Figure 17, “Daughter Card Secondary Side
Layout,” on page 26.
Updated “Bill of Materials: Si24xx Daughter Card” .
Revision 0.3 to Revision 0.4
Changed from Rev.1.0 to Rev.1.1 Daughter Card.
Revision 0.4 to Revision 0.5
Changed from Rev.3.1 to Rev.3.2 Motherboard.
Revision 0.5 to Revision 0.6
Changed from Rev.1.1 to Rev.1.2 Daughter Card.
Added FS (SOIC) Package Option.
Revision 0.6 to Revision 0.7
Changed R1.2 to 2.0 daughtercard.
Changed R32 to 5.0 motherboard.
Changed power amplifier chip and speakers.
Removed connector to SSI BUS.
Changed regulator and power on reset circuit.
Changed various jumper locations.
34
Rev. 0.7
Si2493/57/34/15/04
Global ISOmodem-EVB
NOTES:
Rev. 0.7
35
Si2493/57/34/15/04
Global ISOmodem-EVB
CONTACT INFORMATION
Silicon Laboratories Inc.
400 West Cesar Chavez
Austin, TX 78701
Tel: 1+(512) 416-8500
Fax: 1+(512) 416-9669
Toll Free: 1+(877) 444-3032
Please visit the Silicon Labs Technical Support web page:
https://www.silabs.com/support/pages/contacttechnicalsupport.aspx
and register to submit a technical support request.
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