Rainbow Electronics DS1631 - Manual (Page 2)

DS1631
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DETAILED PIN DESCRIPTION Table 1
PIN SYMBOL DESCRIPTION
1 SDA Data input/output pin for 2-wire serial communication port. Open drain.
2 SCL Clock input pin for 2-wire serial communication port.
3 T
OUT
Thermostat output pin. Push-pull.
4 GND Ground pin.
5 A
2
Address input pin.
6 A
1
Address input pin.
7 A
0
Address input pin.
8 V
DD
Supply Voltage. 2.7V to 5.5V input power pin.
DS1631 FUNCTIONAL BLOCK DIAGRAM Figure 1
DS1631 REGISTER SUMMARY Table 2
REGISTER
NAME
USER
ACCESS
SIZE MEMORY
TYPE
REGISTER CONTENTS
AND POWER-UP/POR STATE
Temperature (Read Only) 2 bytes SRAM Measured temperature in two’s complement
format.
Power-up/POR state: -60ºC (1100 0100
0000 0000)
T
H
(Read/
Write) 2 bytes EEPROM Upper alarm trip point in two’s complement
format.
Power-up/POR state: user defined.
T
L
(Read/
Write) 2 bytes EEPROM Lower alarm trip point in two’s
complement format.
Power-up/POR state: user defined.
Configuration (Read/
Write, but
some bits are
Read Only—
see Table 5)
1 byte SRAM and
EEPROM
Configuration and status information.
Unsigned data.
6 MSbs = SRAM
2 LSbs (POL and 1SHOT bits) = EEPROM
Power-up/POR state: 100011XX (XX =
User defined)
T
H
REGISTER
T
L
REGISTER
DIGITAL
COMPARATOR/LOGIC
CONFIGURATION REGISTER
AND CONTROL LOGIC
TEMPERATURE SENSOR ADDRESS
AND
I/O CONTROL
V
DD
SCL
SDA
A
1
A
2
A
0
GND
T
OUT