BQ2040_15 Datasheet, PDF (23/36 Pages) Texas Instruments – Gas Gauge IC With SMBus Interface

Not Recommended For New Designs
bq2040
Table 10. Example Register Contents
EEPROM
EEPROM
Address Hex Contents
Low High
Description Byte Byte
EEPROM
length
0x00
EEPROM check 1 0x01
Remaining time
alarm
0x02 0x03
Remaining
capacity alarm
0x04 0x05
Reserved
0x06 0x07
Initial charging
current
0x08 0x09
Charging voltage 0x0a 0x0b
Battery status 0x0c 0x0d
Cycle count
0x0e 0x0f
Design capacity
Design voltage
Specification
information
Manufacture
date
Serial number
Fast-charging
current
Maintenance
charge current
Reserved
Current
overload
0x10 0x11
0x12 0x13
0x14 0x15
0x16 0x17
0x18 0x19
0x1a 0x1b
0x1c 0x1d
0x1e 0x1f
0x2c 0x2d
Battery low % 0x2e
Low
Byte
64
5b
0a
f0
00
60
d8
80
00
60
40
10
a1
12
60
00
00
70
08
High Example
Byte Values
Notes
100 Must be equal to 0x64.
91
Must be equal to 0x5b.
00 10 minutes Sets the low time alarm level.
00 240mAh Sets the low capacity alarm level.
00
0
Not currently used by the bq2040.
09 2400mA Sets the initial charge request.
40
16600mV
Used to set the fast-charge voltage for the Smart
Charger.
00
128 Initializes BatteryStatus.
00
0
Contains the charge cycle count and can be set to zero
for a new battery.
09 2400mAh Normal battery pack capacity.
38 14400mV Nominal battery pack voltage.
00
1.0
Default value for this register in a 1.0 part.
20
May 1, 1996
= 8353
Packed per the ManufactureDate description.
27
10002 Contains the optional pack serial number.
09
2400mA
Used to set the fast-charge current for the Smart
Charger.
00
0mA
Contains the desired maintenance current after fast-
charge termination by the bq2040.
00
0
Must be programmed to 0x00.
17
6000mA
Sets the discharge current at which EDV threshold
monitoring is disabled.
Sets the battery capacity that RemainingCapacity is
3%
reduced to at EDV1. The value equals 2.56 ∗ (%RM at
EDV1)
23