STTS2004 datasheet(30/58 Pages) STMICROELECTRONICS

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Temperature sensor registers

STTS2004

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DocID024229 Rev 3

4.6

Device ID and device revision ID register (read-only)

The device IDs and device revision IDs are maintained in this register. The register format is

shown in Table 21. The device IDs and device revision IDs reflect the current device.

The current device ID and revision ID value is 2201 h.

4.7

Temperature resolution register (read/write)

With this register a user can program the temperature sensor resolution from 9-12 bits as

shown below. The power-on default is always 10 bit (0.25 °C/LSB). The selected resolution

is also reflected in bits (4:3) (TRES1:TRES0) of the capability register.

The default value is 01 for TRES register.

Table 21. Device ID and device revision ID register (read-only)

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

00100010

Device ID

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

00000001

Device revision ID

Table 22. Temperature resolution register (TRES) (read/write)

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

00000001

Resolution section register

Resolution bits

Table 23. TRES details

Resolution register bits

Bit1

Bit0

°C/LSB

Bits

Conversion time (max)

0.5

65 ms

0.25

125 ms (default)

0.125

250 ms

0.0625

500 ms

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