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Command Codes

Manufacturer Access() (0x00)

bq2084-V143

SLUS732 – SEPTEMBER 2006

The SMBus command codes are in (). Temperature(), Voltage(), Current(), and AverageCurrent(), performance

specifications are at bq29312 regulated VCC (V(REG)) and a temperature of -20 ° C to 85 ° C.

Description: This function provides writable command codes to control the bq2084-V143 during normal

operation and pack manufacture. Writing the command code to SMB command 0x00 causes the following reads

with the SMB command 0x00 to return the word indicated in the table. The following commands are available:

COMMAND CODE NAME DESCRIPTION

0x0001 Device Type Returns IC part number so it can be read, i.e., 2084 (0x0824)

0x0002 Firmware Rev Returns firmware version so it can be read

0x0003 EDV Level Returns the pending end-of-discharge voltage level so it can be read

0x0004 Manufacturer Status Returns the battery system status so it can read

0x0005 SHIP Command Instructs the bq2084-V143 to instruct the bq29312 to enter ship mode

Instructs the bq2084-V143 to restrict access to those functions listed in Table 3 . The

0x062b Seal

bq2084-V143 completes the seal function and clears ManufacturerAccess().

The Manufacture Status word is defined as:

b15 b14 b13 b12 b11 b10 b9 b8

FET1 FET0 PF1 PF0 STATE3 STATE2 STATE1 STATE0

b7 b6 b5 b4 b3 b2 b1 b0

0 0 0 0 1 0 1 0

FET1, FET0

Indicated the state of the charge and discharge FETs

0,0 Both charge and discharge FETs are on.

0,1 Charge FET is off, discharge FET is on.

1,0 Both charge and discharge FETs are off.

1,1 Charge FET is on, discharge FET is off.

PF1, PF0

Indicates permanent failure cause when permanent failure indicated by STATE3-STATE0

0,0 Fuse is blown

0,1 Cell imbalance failure

1,0 Safety voltage failure

1,1 FET failure

STATE3, STATE2, STATE1, STATE0

Indicates battery state as defined in the State and Status bit Summary.

Purpose: The ManufacturerAccess() function provides the system host access to bq2084-V143 functions that

are not defined by the SBD.

SMBus protocol: Read or write word

Input/Output: Word

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