Datasheet

bq28400
SLUSA61A –OCTOBER 2010–REVISED DECEMBER 2010 www.ti.com
COMMUNICATIONS
The bq28400 uses SMBus v1.1 in Slave Mode per the SBS specification.
SBS Commands
Table 1. SBS COMMANDS
SBS Default
Mode Name Format Min Value Max Value Unit
Command Value
0x00 R/W ManufacturerAccess H2 0x0000 0xffff —
0x03 R/W BatteryMode H2 0x0000 0xe383 —
0x08 R Temperature U2 0 65535 — 0.1°K
0x09 R Voltage U2 0 65535 — mV
0x0a R Current I2 –32768 32767 — mA
0x0b R AverageCurrent I2 –32768 32767 — mA
0x0c R MaxError U1 0 100 — %
0x0d R RelativeStateOfCharge U1 0 100 — %
mAh or 10
0x0f R/W RemainingCapacity U2 0 65535 —
mWh
0x10 R FullChargeCapacity U2 0 65535 7200 mAh
0x14 R ChargingCurrent U2 0 65534 2500 mA
0x15 R ChargingVoltage U2 0 65534 12600 mV
0x16 R BatteryStatus U2 0x0000 0xdbff —
0x17 R/W CycleCount U2 0 65535 0
0x18 R/W DesignCapacity U2 0 65535 7200 mAh
0x19 R/W DesignVoltage U2 0 65535 10800 mV
0x1a R/W SpecificationInfo H2 0x0000 0xffff 0x0031
0x1b R/W ManufactureDate U2 — — 0 ASCII
0x1c R/W SerialNumber H2 0x0000 0xffff 0x0001
0x20 R/W ManufacturerName S12 — — Texas Inst. ASCII
0x21 R/W DeviceName S8 — — bq28400 ASCII
0x22 R/W DeviceChemistry S5 — — LION ASCII
0x23 R/W ManufacturerData S9 — — — ASCII
0x2f R/W Authenticate S21 — — — ASCII
0x3e R CellVoltage2 U2 0 65535 — mV
0x3f R CellVoltage1 U2 0 65535 — mV
Extended SBS Commands
Table 2 shows the extended SBS commands for the device.
Table 2. Extended SBS Commands
SBS Mode Name Format Size in Min Value Max Value Default Unit
Cmd Bytes Value
0x61 R/W FullAccessKey hex 4 0x00000000 0xffffffff —
0x63 R/W AuthenKey3 hex 4 0x00000000 0xffffffff —
0x64 R/W AuthenKey2 hex 4 0x00000000 0xffffffff —
0x65 R/W AuthenKey1 hex 4 0x00000000 0xffffffff —
0x66 R/W AuthenKey0 hex 4 0x00000000 0xffffffff —
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