Datasheet

Two-wire Digital Temperature Sensor

8585B–SEEPR–8/10

6.7. Temperature Register (16-bit Read only, Address = 05h)

The temperature register holds the internal temperature measurement data represented in 11-bit 2’s complement

word format allowing for resolution equal to 0.125°C (least significant bit). The upper three bits (15, 14, 13) of the

temperature register indicates the trip status of the current temperature and most important, are not affected by

the status of the output of the

EVENT

pin (see Table 6-13 and Table 6-14).

Table 6-13. Temperature Register Bit Distribution

Bit 15 14 13 12 11 10 9 8

Symbol CRITHIGH ALMHIGH ALMLOW SIGN 128°C 64°C 32°C 16°C

Default Value 0 0 0 0 0 0 0 0

R / W access R R R R R R R R

Bit 7 6 5 4 3 2 1 0

Symbol 8°C 4°C 2°C 1°C 0.5°C 0.25°C 0.125°C RFU

Default Value 0 0 0 0 0 0 0 0

R / W access R R R R R R R R

Table 6-14. Temperature Register Bit Description

Bit Symbol Description

15 CRITHIGH 0 = Ambient temperature is less than the Critical Alarm Trip Register setting

1 = Ambient temperature is greater than or equal to Critical Alarm Trip Register setting

When this bit is set ‘1’, it will automatically clear once the measured temperature decreases

below or is equal to the trip point minus any hysteresis set

14 ALMHIGH 0 = Ambient temperature is below the Upper Alarm Trip register setting

1 = Ambient temperature is above the Upper Alarm Trip register setting

When the bit is set ‘1’, it will automatically clear once the measured temperature decreases

below or is equal to the trip point minus any hysteresis set

13 ALMLOW 0 = Ambient temperature is above the Lower Alarm Trip register setting

1 = Ambient temperature is below the Lower Alarm Trip register setting

When the bit is set ‘1’, it will automatically clear once the measured temperature increases

above or is to equal to the trip point

12 SIGN Sign Bit

0 = Ambient temperature is greater than or equal to 0°C

1 = Ambient temperature is less than 0°C

11:1 TEMP Ambient Temperature Bits

Represented in two’s complement format

The encoding of bits B11 through B2 is the same as in the Alarm Trip registers.

0 RFU Reserved for future use. Read as ‘0’.