Datasheet

5
bq2040
Parameter Name Address Description Length Units
Charge efficiency 0x4b Sets the high/low charge rate efficiencies 8 bits NA
Full charge percentage 0x4c
Sets the percent at which the battery is consid
-
ered fully charged
8 bits NA
Digitial filter 0x4d Sets the minimum charge/discharge threshold 8 bits NA
Current integration gain 0x4e
Programs the current integration gain to the
sense resistor value
8 bits NA
Self-discharge rate 0x4f Sets the battery’s self-discharge rate 8 bits NA
Manufacturer data 0x50-0x55 Programs ManufacturerData (0x23) 48 bits NA
Voltage gain1 0x56/0x57 Battery divider calibration value 16 bits NA
Reserved 0x58-0x59 Reserved 16 bits NA
EDVF charging current 0x5a/0x5b
Sets the charge current request when the battery
voltage is less than EDVF
16 bits NA
End of discharge voltage1 0x5c/0x5d Sets EDV1 16 bits NA
End of discharge voltage final 0x5e/0x5f Sets EDVF 16 bits NA
Full-charge capacity 0x60/0x61 Initializes and stores FullChargeCapacity (0x10) 16 bits mAh
∆t step
0x62
Sets the ∆t step for ∆T/∆t termination
8 bits NA
Hold-off time 0x63
Sets ∆T/∆t hold-off timer
8 bits NA
EEPROM check 2 0x64
EEPROM data integrity check byte
must = 0xb5
8 bits NA
Reserved 0x65-0x7f Reserved for future use NA
Table 1. Configuration Memory Map (Continued)