BQ26231_15 Datasheet, PDF (11/23 Pages) Texas Instruments – EMBEDDED PORTABLE APPLICATIONS

Not Recommended for New Designs
bq26231
APPLICATION INFORMATION
SLUS491 – JULY 2001
bq26231 command and status registers
The bq26231 command and status registers are listed and described in Table 4.
command (CMDR)
The write-only command register is accessed when the bq26231 has received eight contiguous valid command
bits. The command register contains two fields:
D W/R
D Command address
The W/R bit of the command register is used to select whether the received command is for a read or a write
function. The W/R values are:
CDMR BITS
7
6
5
4
3
2
1
0
W/R
–
–
–
–
–
–
–
where W/R is
0 The bq26231 outputs the requested register contents specified by the address portion of the CMDR.
1 The following eight bits should be written to the register specified by the address portion of the CMDR.
Table 4. bq26231 Command and Status Registers
Symbol
CMDR
DCRH
DCRL
CCRH
CCRL
SCRH
SCRL
DTCH
DTCL
CTCH
CTCL
MODE/
WOE
TMP/
CLR
OFR
Register Name
Command register
Discharge count
register high byte
Discharge count
register low byte
Charge count
register high byte
Charge count
register low byte
Self-discharge count
register high byte
Self-discharge count
register low byte
Discharge time
count high byte
Discharge time
count low byte
Charge time count
high byte
Charge time count
low byte
Mode/WOE register
Temperature/clear
register
Offset register
HDQ
Address
(hex)
–
7F
7E
7D
7C
7B
7A
79
78
77
76
75
74
73
Read/
Write
Write
Read
Read
Read
Read
Read
Read
Read
Read
Read
Read
Read/
Write
Read/
Write
Read/
Write
Bit 7
(MSB)
W/R
DCRH7
DCRL7
CCRH7
CCRL7
SCRH7
SCRL7
DTCH7
DTCL7
CTCH7
CTCL7
OVERDQ
TMP2
OFR7
Bit 6
AD6
DCRH6
DCRL6
CCRH6
CCRL6
SCRH6
SCRL6
DTCH6
DTCL6
CTCH6
CTCL6
CAL
TMP1
OFR6
Bit 5
AD5
DCRH5
DCRL5
CCRH5
CCRL5
SCRH5
SCRL5
DTCH5
DTCL5
CTCH5
CTCL5
STC
TMP0
OFR5
Bit 4
AD4
DCRH4
DCRL4
CCRH4
CCRL4
SCRH4
SCRL4
DTCH4
DTCL4
CTCH4
CTCL4
STD
CTC
OFR4
Bit 3
AD3
DCRH3
DCRL3
CCRH3
CCRL3
SCRH3
SCRL3
DTCH3
DTCL3
CTCH3
CTCL3
WOE3
DTC
OFR3
Bit 2
AD2
DCRH2
DCRL2
CCRH2
CCRL2
SCRH2
SCRL2
DTCH2
DTCL2
CTCH2
CTCL2
WOE2
SCR
OFR2
Bit 1
AD1
DCRH1
DCRL1
CCRH1
CCRL1
SCRH1
SCRL1
DTCH1
DTCL1
CTCH1
CTCL1
WOE1
CCR
OFR1
Bit0
(LSB)
AD0
DCRH0
DCRL0
CCRH0
CCRL0
SCRH0
SCRL0
DTCH0
DTCL0
CTCH0
CTCL0
0
DCR
OFR0
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