I2C interface

STC3100

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8.2

Register map

The register space provides 12 control registers, 8 read-only (factory OTP) registers for

unique device ID and 32 read/write general-purpose RAM registers. Mapping of all registers

is shown in Table 9. Detailed descriptions of registers 0 (REG_MODE) and 1 (REG_CTRL)

are shown in Table 10 and Table 11. All registers are reset to default values at power-on or

reset, and the PORDET bit in register REG_CTRL is used to indicate the occurrence of a

power-on reset.

Table 9.

Register map

Name

Address

(decimal)

Type

Description

Control registers

0 to 23

REG_MODE

0

R/W

Mode register

REG_CTRL

1

R/W

Control and status register

REG_CHARGE_LOW

2

R

Gas gauge charge data, bits 0-7

REG_CHARGE_HIGH

3

R

Gas gauge charge data, bits 8-15

REG_COUNTER_LOW

4

R

Number of conversions, bits 0-7

REG_COUNTER_HIGH

5

R

Number of conversions, bits 8-15

REG_CURRENT_LOW

6

R

Battery current value, bits 0-7

REG_CURRENT_HIGH

7

R

Battery current value, bits 8-15

REG_VOLTAGE_LOW

8

R

Battery voltage value, bits 0-7

REG_VOLTAGE_HIGH

9

R

Battery voltage value, bits 8-15

REG_TEMPERATURE_LOW

10

R

Temperature value, bits 0-7

REG_TEMPERATURE_HIGH

11

R

Temperature value, bits 8-15

Device ID registers

24 to 31

REG_ID0

24

R

Part type ID = 10h

REG_ID1

25

R

Unique part ID, bits 0-7

REG_ID2

26

R

Unique part ID, bits 8-15

REG_ID3

27

R

Unique part ID, bits 16-23

REG_ID4

28

R

Unique part ID, bits 24-31

REG_ID5

29

R

Unique part ID, bits 32-39

REG_ID6

30

R

Unique part ID, bits 40-47

REG_ID7

31

R

Device ID CRC

RAM registers

32 to 63

REG_RAM0

32

R/W

General-purpose RAM register 0

...

...

...

REG_RAM31

63

R/W

General-purpose RAM register 31