BQ34Z651_15 Datasheet, PDF (19/29 Pages) Texas Instruments – SBS 1.1-Compliant Gas Gauge

bq34z651
www.ti.com
SLUSAL7 – AUGUST 2011
COMMUNICATIONS
The bq34z651 uses SMBus v1.1 with Master Mode and packet error checking (PEC) options per the SBS
specification.
SMBus On and Off State
The bq34z651 detects an SMBus off state when SMBC and SMBD are logic-low for ≥ 2 seconds. Clearing this
state requires either SMBC or SMBD to transition high. Within 1 ms, the communication bus is available.
SBS Commands
SBS
Cmd
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0a
0x0b
0x0c
0x0d
0x0e
0x0f
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
Mode
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R/W
R
R
R
R
R
R
R
R/W
R/W
R/W
Name
ManufacturerAccess
RemainingCapacityAlarm
RemainingTimeAlarm
BatteryMode
AtRate
AtRateTimeToFull
AtRateTimeToEmpty
AtRateOK
Temperature
Voltage
Current
AverageCurrent
MaxError
RelativeStateOfCharge
AbsoluteStateOfCharge
RemainingCapacity
FullChargeCapacity
RunTimeToEmpty
AverageTimeToEmpty
AverageTimeToFull
ChargingCurrent
ChargingVoltage
BatteryStatus
CycleCount
DesignCapacity
DesignVoltage
Table 2. SBS COMMANDS
Format
Hex
Integer
Unsigned
integer
Hex
Integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Integer
Integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Unsigned
integer
Hex
Unsigned
integer
Integer
Integer
Size in
Bytes
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
2
2
2
2
2
2
2
2
2
2
2
Min
Value
0x0000
0
0
Max
Value
0xffff
700 or 1000
30
0x0000
–32,768
0
0xffff
32,767
65,535
0
65,535
0
65,535
0
65,535
0
20,000
–32,768
–32,768
0
32767
32,767
100
0
100
0
100+
0
65,535
0
65,535
0
65,534
0
65,534
0
65,534
0
65,534
0
65,534
0x0000
0
0xdbff
65,535
0
7000
32,767
18,000
Default Value
—
300 or 432
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
4400 or 6336
14,400
Copyright © 2011, Texas Instruments Incorporated
Unit
—
mAh or 10 mWh
min
—
mA or 10 mW
min
min
—
0.1°K
mV
mA
mA
%
%
%
mAh or 10 mWh
mAh or 10 mWh
min
min
min
mA
mV
—
—
mAh or 10 mWh
mV
19