BQ2084-V140_14 Datasheet, PDF (31/64 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

bq2084-V140
www.ti.com
SLUS664B – JULY 2005 – REVISED AUGUST 2006
Command Codes
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.
Manufacturer Access() (0x00)
Description: This function provides writable command codes to control the bq2084-V140 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
0x0001
0x0002
0x0003
0x0004
0x0005
NAME
Device Type
Firmware Rev
EDV Level
Manufacturer Status
SHIP Command
0x062b
Seal
DESCRIPTION
Returns IC part number so it can be read, i.e., 2084 (0x0824)
Returns firmware version so it can be read
Returns the pending end-of-discharge voltage level so it can be read
Returns the battery system status so it can read
Instructs the bq2084-V140 to instruct the bq29312 to enter ship mode
Instructs the bq2084-V140 to restrict access to those functions listed in Table 3. The
bq2084-V140 completes the seal function and clears ManufacturerAccess().
The Manufacture Status word is defined as:
b15
b14
b13
b12
FET1
FET0
PF1
PF0
b11
STATE3
b10
STATE2
b9
STATE1
b8
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-V140 functions that
are not defined by the SBD.
SMBus protocol: Read or write word
Input/Output: Word
Submit Documentation Feedback
31