bq20z655-R1

www.ti.com

SLUSAN9

– AUGUST 2011

COMMUNICATIONS

The bq20z655-R1 uses SMBus v1.1 with Master Mode and package error checking (PEC) options per the SBS

specification.

SMBus On and Off State

The bq20z655-R1 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

Table 2. SBS COMMANDS

SBS

SIZE IN

MIN

MAX

DEFAULT

MODE

NAME

FORMAT

UNIT

VALUE

CMD

BYTES

VALUE

VALUE

0x00

R/W

ManufacturerAccess

Hex

2

0x0000

0xffff

—

—

0x01

R/W

RemainingCapacityAlarm

Integer

2

0

700 or 1000

300 or 432

mAh or 10 mWh

0x02

R/W

RemainingTimeAlarm

Unsigned

2

0

30

10

min

integer

0x03

R/W

BatteryMode

Hex

2

0x0000

0xffff

—

—

0x04

R/W

AtRate

Integer

2

–32,768

32,767

—

mA or 10 mW

0x05

R

AtRateTimeToFull

Unsigned

2

0

65,535

—

min

integer

0x06

R

AtRateTimeToEmpty

Unsigned

2

0

65,535

—

min

integer

0x07

R

AtRateOK

Unsigned

2

0

65,535

—

—

integer

0x08

R

Temperature

Unsigned

2

0

65,535

—

0.1

°K

integer

0x09

R

Voltage

Unsigned

2

0

20,000

—

mV

integer

0x0a

R

Current

Integer

2

–32,768

32767

—

mA

0x0b

R

AverageCurrent

Integer

2

–32,768

32,767

—

mA

0x0c

R

MaxError

Unsigned

1

0

100

—

%

integer

0x0d

R

RelativeStateOfCharge

Unsigned

1

0

100

—

%

integer

0x0e

R

AbsoluteStateOfCharge

Unsigned

1

0

100+

—

%

integer

0x0f

R/W

RemainingCapacity

Unsigned

2

0

65,535

—

mAh or 10 mWh

integer

0x10

R

FullChargeCapacity

Unsigned

2

0

65,535

—

mAh or 10 mWh

integer

0x11

R

RunTimeToEmpty

Unsigned

2

0

65,534

—

min

integer

0x12

R

AverageTimeToEmpty

Unsigned

2

0

65,534

—

min

integer

0x13

R

AverageTimeToFull

Unsigned

2

0

65,534

—

min

integer

0x14

R

ChargingCurrent

Unsigned

2

0

65,534

—

mA

integer

0x15

R

ChargingVoltage

Unsigned

2

0

65,534

—

mV

integer

0x16

R

BatteryStatus

Hex

2

0x0000

0xdbff

—

—

0x17

R/W

CycleCount

Unsigned

2

0

65,535

0

—

integer

0x18

R/W

DesignCapacity

Integer

2

0

32,767

4400 or 6336

mAh or 10 mWh

0x19

R/W

DesignVoltage

Integer

2

7000

18,000

14,400

mV

Copyright

© 2011, Texas Instruments Incorporated

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