Datasheet

Not Recommended for New Designs

bq27505

SLUS884–FEBRUARY 2009

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4.1 DATA COMMANDS

4.1.1 STANDARD DATA COMMANDS

The bq27505 uses a series of 2-byte standard commands to enable system reading and writing of battery

information. Each standard command has an associated command-code pair, as indicated in Table 4-1.

Because each command consists of two bytes of data, two consecutive I

C transmissions must be

executed both to initiate the command function, and to read or write the corresponding two bytes of data.

Additional options for transferring data, such as spooling, are described in Section of Communication.

Standard commands are accessible in NORMAL operation. Read/Write permissions depend on the active

access mode, SEALED or UNSEALED (for details on the SEALED and UNSEALED states, refer to

Section 4.4, Access Modes.)

Table 4-1. Standard Commands

SEALED UNSEALED

NAME COMMAND CODE UNITS

ACCESS ACCESS

Control( ) CNTL 0x00 / 0x01 N/A R/W R/W

AtRate( ) AR 0x02 / 0x03 mA R/W R/W

AtRateTimeToEmpty( ) ARTTE 0x04 / 0x05 Minutes R R/W

Temperature( ) TEMP 0x06 / 0x07 0.1 K R R/W

Voltage( ) VOLT 0x08 / 0x09 mV R R/W

Flags( ) FLAGS 0x0a / 0x0b N/A R R/W

NominalAvailableCapacity( ) NAC 0x0c / 0x0d mAh R R/W

FullAvailableCapacity( ) FAC 0x0e / 0x0f mAh R R/W

RemainingCapacity( ) RM 0x10 / 0x11 mAh R R/W

FullChargeCapacity( ) FCC 0x12 / 0x13 mAh R R/W

AverageCurrent( ) AI 0x14 / 0x15 mA R R/W

TimeToEmpty( ) TTE 0x16 / 0x17 Minutes R R/W

TimeToFull( ) TTF 0x18 / 0x19 Minutes R R/W

StandbyCurrent( ) SI 0x1a / 0x1b mA R R/W

StandbyTimeToEmpty( ) STTE 0x1c / 0x1d Minutes R R/W

MaxLoadCurrent( ) MLI 0x1e / 0x1f mA R R/W

MaxLoadTimeToEmpty( ) MLTTE 0x20 / 0x21 Minutes R R/W

AvailableEnergy( ) AE 0x22 / 0x23 mWh R R/W

AveragePower( ) AP 0x24 / 0x25 mW R R/W

TTEatConstantPower( ) TTECP 0x26 / 0x27 Minutes R R/W

StateOfHealth() SOH 0x28 / 0x29 % / num R R/W

StateOfCharge( ) SOC 0x2c / 0x2d % R R/W

NormalizedImpedanceCal( ) NIC 0x2e / 0x2f mohm R R/W

InstaneousCurrent Reading( ) ICR 0x30 / 0x31 mA R R/W

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