SP693ACT-L/TR [SIPEX]
暂无描述;
| 型号： | SP693ACT-L/TR |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | 暂无描述 |
| 文件： | 总7页 (文件大小：58K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP691A/693A
Evaluation Board Manual
■ Easy Evaluation for the
SP691A/693A Microprocessor
Supervisory Circuit
■ Probe Points Accessible
for all SP691A/693A
Pins & Input Options
■ 16 Pin Narrow SOIC or DIP
Sockets Available for the
SP691A/693A Circuit
■ Pin compatible upgrade to
MAX691A, 693A, 800L, 800M
DESCRIPTION
The SP691A/693A Evaluation Board is designed to help analyze the many functions of the
SP691A/693A µP Supervisory circuit. The evaluation board provides easy probe access
points to all SP691A/693A pins so that the user can measure electrical characteristics and
waveforms of each signal. The SP691A/693A Evaluation Board also provides solder pads
for DIP or SOIC packages, as well as options for DIP or SOIC sockets for easy evaluation of
multiple devices.
The next two sections describe the SP691A/693A Board Layout and Using the SP691A/
693A Evaluation Boards. A table of SP691A/693A Pin Assignments is also included with a
section on Power Supply Connections. A SP691A/693A Evaluation Board List of Materials is
provided with some manufacturers part numbers to use as a reference. Finally, a schematic
is included of the SP691A/693A Evaluation Board.
SP691AEB/03
SP691A/693A Evaluation Board Manual
© Copyright 2000 Sipex Corporation
1
Evaluating Pin Functions
BOARD LAYOUT
Pin 1 – VBATT – Backup-Battery Input.
Connect to external supply, battery or capacitor
and charging circuit. If this pin is not used,
connect to GND.
The SP691A/693A Evaluation Board has been
designed to easily and conveniently provide
access to all pins of the SP691A/693A device
under test. Position the board with the silkscreen
lettering upright (also see drawing on the front
page of this manual) and you will see two
vertical rows of eight pins each, which represent
the 16 pins of the SP691A/693A device starting
Pin 2 – V
– Output Supply Voltage. This
function iOsUTused to provide power supply
switching of either VCC or V
to an
external device like a CMOS RAMBtAoTTensure a
constant supply for the memory. To evaluate this
function, vary the VCC voltage for a set V
voltage until you simulate the followBinATgT
conditions: VOUT connects to VCC when VCC is
greater than VBATT and V is above the reset
threshold. When VCC fallsCbCelow VBATT and VCC
in the top left with V
as pin one. The pin
receptacles are raisedBAfTeTmale pins which can
accommodate easy-hook connection leads for
power and meter connections, as well as scope
probe hooks and grounds for waveform
measurements.
is below the reset threshold, V
. Start with V
voltage OoUfT about 2.8 to
4.B0AVTT and vary V BfArToTm 0V to 5V to 0V and
observe VOUT
CC(Note: a 0.1µF bypass
capacitor (C1) is connected from VOUT to GND).
Connect VOUT to VCC if no backup battery is used.
connects to
The 16 pin SP691A/693A may be installed in
one of 3 locations: U1 for DIP or DIP sockets,
U3 for SOICs or U2 for SOIC sockets. The five
input pins for the SP691A/693A are provided
with extra Input Probe Points for connecting
inputs to these pins. For example pin 11 WDI
has nearby pins VOUT and GND to connect to for
evaluation of WDI timeout. These female
receptacle pins can be jumpered together with
easy-hook connectors or stripped back solid wire
leads. In the case of inputs OSC IN, OSC SEL
or PFI, a resistor or capacitor with leads may be
pushed into the female receptacle pins to make
easy connections. Also, mating male pins (see
List of Materials) may be soldered to the
components and inserted into the receptacle pins.
V
.
Pin 3 – VCC – Input Supply Voltage - +5V input.
A 0.1(F bypass capacitor (C2) is connected
from VCC to GND.
Pin 4 – GND – Ground reference for all signals.
Pin 5 – BATT ON – Battery On Output. Goes
high when V
switches to VBATT. Goes
low when V OUTswitches to V . Connect
the base of a OPUNT P through a curCreCnt-limiting
resistor to BATT ON for VOUT current
requirements greater than 250mA.
USING THE EVALUATION BOARD
Pin 6 - LOWLINE - LOWLINE Output goes
low when VCC falls below the reset threshold.
It returns high as soon as V rises above the
reset threshold. The outpuCtCcan be used to
generate a NMI (non-maskable interrupt) if the
unregulated supply is inaccessible.
Connect the SP691A/693A Evaluation Board
to the power supplies for V and V
(see the section Power SupplyCCConnectiBoAnTsT
following the table SP691A/693A Pin
Assignments). It is good practice to not switch
power on until power connections are made to
the evaluation board.
SP691AEB/03
SP691A/693A Evaluation Board Manual
© Copyright 2000 Sipex Corporation
2
Pin 7 – OSC IN – External Oscillator Input.
When OSC SEL is unconnected or driven high,
a 10µA pull-up connects from V to OSC IN,
the internal oscillator sets the reseOtUaTnd watchdog
timeout periods, and OSC IN selects between
fast and slow watchdog timeout periods. When
OSC SEL is driven low, the reset and watchdog
timeout periods may be set either by a capacitor
from OSC IN to ground or by an external clock
at OSC IN.
When Reset is asserted, this path is disabled.
Note that CE OUT goes low (active) only when
CE IN is low and V is above the reset threshold.
If CE IN is low whCeCn reset is asserted, CE OUT
will stay low for 12µs or until CE IN goes high,
whichever occurs first.
Pin 13 – CE IN – Chip-Enable Input. The Input
to chip-enable gating circuit. Connect to GND
or VOUT if not used.
Pin 8 – OSC SEL– Oscillator Select. When OSC
SEL is unconnected or driven high, the internal
oscillator sets the reset and watchdog timeout
periods. When OSC SEL is low, the external
oscillator input (OSC IN) is enabled. OSC SEL
has a 10µA pull-up.
Pin 14 –WDO – Watchdog Output. WDO goes
low and reset is asserted if WDI remains either
high or low longer than the watchdog timeout
period. WDO returns high on the next transition
at WDI. WDO remains high if WDI is
unconnected. WDO is also high when RESET
is asserted.
Pin 9 – PFI – Power-Fail Input. This is the
non-inverting input to the power-fail comparator.
When PFI is less than 1.25V, PFO_N goes low.
Connect PFI to GND or VOUT when not used.
Connect external divider R1 & R2 to Probe Pins
and connect Unregulated Voltage to UNREG
for Power Fail monitoring.
Pin 15 – RESET – RESET output goes low
whenever VCC falls below the reset threshold.
RESET will remain low for 200ms (when
internal oscillator is used) after VCC crosses the
reset threshold on power-up.
Pin 10 – PFO – Power-Fail Output. This is the
output of the power-fail comparator. PFO, goes
low when PFI is less than 1.25V. This is an
uncommitted comparator, and has no effect on
any other internal circuitry.
Pin 16 – RESET – RESET Output goes high
whenever VCC falls below the reset threshold.
RESET is open drain and is the inverse of
RESET.
Pin 11 – WDI – Watchdog Input. WDI is a
three-level input. If WDI remains either high or
low for longer than the watchdog timeout
period, WDO goes low and reset is asserted for
the reset timeout period. WDO remains low
until the next transition at WDI. Leaving WDI
unconnected disables the watchdog function.
WDI connects to an internal voltage divider
between VOUT and GND, which sets it to
mid-supply when left unconnected. For a simple
check of watchdog function, connect WDI to
either Probe pins GND or VOUT to cause WDO
to go to a Logic Low.
Note: To accurately measure the extremely small
supply current in Battery Back-up mode, you
need to cut split pads SP1 & SP2 (solder side
of board) severing connections to C1 & C2
which would have leakage currents in the
measurement range. Also, remove charging
circuit components CBATT and D1 if they are
installed.
Pin 12 – CE OUT – Chip-Enable Output. The
Chip-Enable (CE) function CE OUT provides
internal gating of chip enable signals to prevent
erroneous data from corrupting the CMOS RAM
in the event of a power failure. During normal
operation, the CE gate is enabled and all CE
transitions are passed from CE IN to CE OUT.
SP691AEB/03
SP691A/693A Evaluation Board Manual
© Copyright 2000 Sipex Corporation
3
SP691A/693A Pin Assignments
Pin #
Pin Name
Pin Function
Active Level Input Pin Points
1
2
VBATT
VOUT
Backup-Battery Input
Output Supply Voltage
Input Supply Voltage
Ground for all Signals
Battery On Output
Lowline Output
NA
NA
3
VCC
NA
4
GND
NA
5
BATT ON
LOWLINE
OSC IN
OSC SEL
PFI
HIGH
LOW
6
7
Oscillator Input
NA
NA
VOUT & GND
VOUT & GND
R1 & R2
8
Oscillator Select
9
Power-Fail Input
Power-Fail Output
Watchdog Input
HIGH
LOW
10
11
12
13
14
15
16
PFO
WDI
Transitions
LOW
V
OUT & GND
OUT & GND
CE OUT
CE IN
WDO
Chip-Enable Output
Chip-Enable Input
Watchdog Output
RESET Output
LOW
V
LOW
RESET
RESET
LOW
RESET Output
HIGH
Power Supply Connections
Pin 3 – VCC – connect to external +5 VDC supply.
Pin 1 – VBATT – connect to external V+ supply of 2.8 to 4.0 VDC, or install capacitor CBATT
and charging diode D1 (see List of Materials).
Pin 4 – GND – connect to negative or ground of +5VDC supply and ground of V+ supply for VBATT
Note: Ensure VCC, VBATT and GND connections are made before operating device.
SP691AEB/03
SP691A/693A Evaluation Board Manual
© Copyright 2000 Sipex Corporation
4
SP691A/693A Evaluation Board List of Materials
Component
Part Number
Manufacturer
Sipex
Ref. Des. Qty.
µP Supervisor IC
SP691ACN
U3
1
26
2
Pin Receptacle-Female 300-1150-1472-7040
Mil-Max Mfg.
Generic
Ceramic Capacitor 0.1µF
C1, 2
Al. Spacers - 0.5"
6-32 Hex Nut
8414
Keystone Elec.
Generic
4
4
Optional:
16 Pin DIP Socket
16 Pin SOIC Socket
Maxcap 1F 5.5V
Signal Diode
216-3340-00-0602
216-7383-55-1902
LC055105A
3M-Textool
3M-Textool
Cesiwid Inc.
Generic
U1
U2
1
1
CBATT
D1
1
1
Pin Receptacle-Male
3137-3002-10-0080
Mill-Max Mfg.
26
SP691AEB/03
SP691A/693A Evaluation Board Manual
© Copyright 2000 Sipex Corporation
5
SP691A/693A Evaluation Board Schematic
SP691AEB/03
SP691A/693A Evaluation Board Manual
© Copyright 2000 Sipex Corporation
6
ORDERING INFORMATION
Model
Package
SP691ANEB ....................................................................................................... SP691ACN Evaluation Board
Co rp o ra tio n
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
SP691AEB/03
SP691A/693A Evaluation Board Manual
© Copyright 2000 Sipex Corporation
7
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