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BQ78412 Fiches technique(PDF) 29 Page - Texas Instruments

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No de pièce BQ78412
Description  Pb-Acid Battery State-of-Charge Indicator With Run-Time Display
Download  36 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

BQ78412 Fiches technique(HTML) 29 Page - Texas Instruments

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SLUSAA0 – OCTOBER 2010
Table 11. bq78412 Parameter Set and Access Rights (continued)
ACCESS RIGHTS
ADDRESS
DATA
DEFAULT
PARAMETER
BYTES
LEVEL1
LEVEL2
DESCRIPTION
UNITS
OFFSET
TYPE(1)
VALUE
R
W
R
W
HARDWARE
Bit[0]: 1= Enable broadcast, 0 = disable broadcast (default)
Bit[1]: Reserved
Bit[5:2]: Number of segments in bar graph display, default = 10.
Bit[9:6]: Battery Status Broadcast Interval in seconds, 20+ n*20s, n = 0-15,
Default = 20 seconds
Bit[10]: 1 = Activated, 0 = Not Activated (default)
Bit[11]: UART baud rate
mm 0 = 9600 (default)
mm 1 = 1200
Bit[13:12]:
DevConfig1
2
U
N
N
N
N
Hex
0x3A
0x0028
mm 0,0 = NRZ encoding (default)
mm 0,1 = IrDA encoding
mm 1,0 = Reserved
mm 1,1 = Reserved
Bit [14]: CapLearnEnable
1 = bq78412 learns the battery capacity opportunistically at end of discharge.
0 = No opportunistic capacity learning (default)
Bit[15]: CapAgeEnable
1 = The bq78412 derates the capacity based on aging rates specified.
0 = No age based capacity derating (default)
Bit[1:0]: Number of beeps on empty.
Bit[3:2]: Number of beeps when LED0 turns off
Bit[5:4]: Number of beeps when LED1 turns off
Bit[7:6]: Number of beeps when LED2 turns of
DevConfig2
2
U
N
N
N
N
Hex
0x3C
0x0000
Bit[10:8]: Number of beeps on overvoltage
Bit[13:11]: Number of beeps on undervoltage
Bit[14]: Reserved
Bit[15]: Enable external XTAL
LEDs
DsplyConf1 (2)
2
U
N
N
N
N
LED bar graph discharge transition point configuration 1
0x3E
DsplyConf2(2)
2
U
N
N
N
N
LED bar graph discharge transition point configuration 2
0x40
0x1E1E
DsplyConf3(2)
2
U
N
N
N
N
LED bar graph discharge transition point configuration 3
minutes
0x42
or {30,30}
DsplyConf4(2)
2
U
N
N
N
N
LED bar graph discharge transition point configuration 4
0x44
DsplyConf5(2)
2
U
N
N
N
N
LED bar graph discharge transition point configuration 5
0x46
Total missed charge due to discharges starting before battery has reached full
MissChgLim
1
U
N
N
N
N
100%
0x48
charge. This number can be set above 100%. Full charge clears this condition.
(2)
Refer to Table 1 for more information.
Copyright © 2010, Texas Instruments Incorporated
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