STC3105

Doc ID 022198 Rev 1

17/23

The charge data is coded in 2’s complement format, and the LSB value is 6.70 uV.h.

The battery current is coded in 2’s complement format, and the LSB value is 11.77 uV.

The battery voltage is coded in binary format, and the LSB value is 2.44 mV.

Table 11.

REG_MODE - address 0

Name

Pos.

Type

Def.

Description

0

Unused

1

R/W

0

Reserved. Write this bit to 0.

PWR_SAVE

2

R/W

0

0: active mode, 1: power-saving mode

ALM_ENA

3

R/W

0

Alarm function: 0: disabled, 1: enabled

GG_RUN

4

R/W

0

0: standby mode. Accumulator and counter

registers are frozen, gas gauge and battery

monitor functions are in standby.

1: operating mode.

[7..5]

Unused

Table 12.

REG_CTRL - address 1

Name

Pos.

Type

Def.

Description

IO0DATA

0

RX

ALM pin status:

0 = ALM input is low, 1 = ALM input is high

W1

ALM pin output drive:

0 = ALM is forced low, 1 = ALM is driven by the

alarm conditions

GG_RST

1

W

0

0: no effect

1: resets the charge accumulator and conversion

counter. GG_RST is a self-clearing bit.

GG_EOC

2

R

0

Set at the end of a battery current conversion

cycle. Clears upon reading.

VM_EOC

3

R

0

Set at the end of a battery voltage conversion

cycle. Clears upon reading.

PORDET

4

R1

Power on reset (POR) detection bit:

0 = no POR event occurred,

1 = POR event occurred

W0

Soft reset:

0 = release the soft-reset and clear the POR

detection bit, 1 = assert the soft-reset and set the

POR detection bit.

ALM_SOC

5

R/W

0

Set by a low-SOC condition. Cleared by writing 0.

ALM_VOLT

6

R/W

0

Set by a low-voltage condition. Cleared by writing

0.

7

Unused