Datasheet

Table 3. Register Summary
REGISTER NAME
(USER ACCESS)
SIZE
(BYTES)
MEMORY
TYPE
REGISTER CONTENTS
AND POWER-UP STATE
Temperature (Read Only) 2 SRAM
Measured temperature in two’s complement format.
Power-up state: -60ºC (1100 0100 0000 0000)
T
H
(Read/Write) 2 EEPROM
Upper alarm trip point in two’s complement format.
Factory state: 15ºC (0000 1111 0000 0000)
T
L
(Read/Write) 2 EEPROM
Lower alarm trip point in two’s complement format.
Factory state: 10ºC (0000 1010 0000 0000)
Conguration (Various bits are Read/
Write and Read Only—See Table 5)
1
SRAM,
EEPROM
Conguration and status information. Unsigned data.
6 MSbs = SRAM
2 LSbs (POL and 1SHOT bits) = EEPROM
Power-up state: 100011XX (XX = user dened)
Figure 3. Timing Diagram
ALL TIMING IS REFERENCED TO 0.9 X V
DD
AND 0.1 x V
DD
.
SDA
STOP
SCL
START
REPEATED
START
t
BUF
t
LOW
t
R
t
HD:STA
t
F
t
HD:STA
t
SP
t
HD:DAT
t
HIGH
t
SU:DAT
t
SU:STA
t
SU:STO
DS1631/DS1631A/
DS1731
High-Precision Digital
Thermometer and Thermostat
www.maximintegrated.com
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