AS6221T

Register description

Datasheet

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6.2.10

Temperature register (Address 0x0)

Table 19: TEMPERATURE value register

Addr: 0x0

Bit

Bit name

0

T0

1

T1

2

T2

3

T3

4

T4

5

T5

6

T6

7

T7

8

T8

9

T9

10

T10

11

T11

12

T12

13

T13

14

T14

15

T15

The temperature register contains the digitally converted temperature value and can be read

by setting the index pointer to the TVAL register (0x0).

Two consecutive bytes must be read to obtain the complete temperature value. The MSB byte

(Bits 15 to 8) is transmitted upon the first read access and the LSB byte (Bits 7 to 0) is

transmitted after the second read access.

A temperature value is represented as a two complement value in order to cover also negative

values. After power-up, the temperature value is read as 0 °C until the first conversion has

been completed. One LSB corresponds to 0.0078125 °C (=1/128 °C).

The binary values can be calculated according to the following formulas:

Positive values:

|Value| / LSB

Negative values:

Complement (|Value| / LSB ) + 1