STC3117 datasheet(24/34 Pages) STMICROELECTRONICS

24 / 34 page

I2C interface

STC3117

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DocID025792 Rev 2

7.2.2

Values held in consecutive registers (such as the SOC value in the REG_SOC register pair)

are stored with low bits in the low-address register (L) and high bits in the high-address

possible to read multiple values in one I2C access. All values must be consistent.

The SOC data are coded in binary format and the LSB of the low byte is 1/512 %. The

battery current is coded in 2’s complement format and the LSB value is 5.88 µV. The battery

voltage is coded in 2’s complement format and the LSB value is 2.20 mV. The temperature

is coded in 2’s complement format and the LSB value is 1°C.

RAM registers

32 to 47

REG_RAM0

R/W

0x00

Working register 0 for gas

gauge

...

REG_RAM15

R/W

0x00

Working register 15 for gas

gauge

OCV table registers

48 to 95

REG_OCVTAB0 (L-H) to

REG_OCVTAB15 (L-H)

48-49 to

78-79

R/W

See

table 14

See

table 14

OCV points, 2 bytes per

point (32 registers)

0.55 mV

REG_SOCTAB0 to

REG_SOCTAB15

80 to 95

R/W

See

table 14

See

table 14

SOC points, 1 byte per point

(16 registers)

1/2 %

Table 11. Register map (continued)

Name

Address

(decimal)

Type

POR

Soft

POR

Description

LSB

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