Datasheet

bq76925
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SLUSAM9B JULY 2011 REVISED DECEMBER 2011
I_GAIN: Current amplifier gain. Sets the nominal gain of the current amplifier as follows.
I_GAIN Current amp gain
0 4
1 8
CONFIG_2
Address Name Type D7 D6 D5 D4 D3 D2 D1 D0
0x04 CONFIG_2 R/W CRC_EN REF_SEL
Defaults: 0 0 0 0 0 0 0 0
CRC_EN: CRC enable. Enables CRC comparison on write. When 1, CRC is enabled. CRC on read is always
enabled but is optional for Host.
REF_SEL: Reference voltage selection. Sets reference voltage output on VREF pin, cell voltage amplifier gain
and VIOUT output range.
REF_SEL VREF (V) VCOUT Gain VIOUT Output Range (V)
0 1.5 0.3 0.25 1.25
1 3.0 0.6 0.5 2.5
POWER_CTL
Address Name Type D7 D6 D5 D4 D3 D2 D1 D0
0x05 POWER_CTL R/W SLEEP SLEEP_DIS I_COMP_EN I_AMP_EN VC_AMP_EN VTB_EN REF_EN
Defaults: 0 0 0 0 0 0 0 0
SLEEP: Sleep control. Set to 1 to put device to sleep
SLEEP_DIS: Sleep mode disable. When 1, disables the sleep mode.
I_COMP_EN: Current comparator enable. When 1, comparator is enabled. Disable to save power.
I_AMP_EN: Current amplifier enable. When 1, current amplifier is enabled. Disable to save power.
VC_AMP_EN: Cell amplifier enable. When 1, cell amplifier is enabled. Disable to save power.
VTB_EN: Thermistor bias enable. When 1, the VTB pin is internally switched to the V3P3 voltage.
REF_EN: Voltage reference enable. When 1, the 1.5 / 3.0 V reference is enabled. Disable to save power
CHIP_ID
Address Name Type D7 D6 D5 D4 D3 D2 D1 D0
0x07 CHIP_ID RO CHIP_ID
Defaults: 0x10
CHIP_ID: Silicon version identifier.
VREF_CAL
Address Name Type D7 D6 D5 D4 D3 D2 D1 D0
0x10 VREF_CAL EEPROM VREF_OFFSET_CORR VREF_GAIN_CORR
VREF_OFFSET_CORR: Lower 4 bits of offset correction factor for reference output. The complete offset
correction factor is obtained by concatenating this value with the the two most significant bits VREF_OC_5 and
VREF_OC_4, which are stored in the VREF_CAL_EXT register. The final value is a 6-bit signed 2s complement
number in the range -32 to +31 with a value of 1 mV per lsb. See description of usage in OPERATIONAL
OVERVIEW.
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