BQ34Z100 Datasheet, PDF (22/50 Pages) Texas Instruments – Wide Range Fuel Gauge with Impedance Track™ Technology

bq34z100
SLUSAU1 – MAY 2012
Mode
0
1
Description
No LED
Single LED
2
4 LED
3
5-LED Expander with I²C
Host Comm
3
10-LED Expander with I²C
Host Comm
4
5-LED Expander with HDQ
Host Comm
4
10-LED Expander with HDQ
Host Comm
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Table 14. Alert Signal Pins
Alert Pin
1
1
Alert Pin Name
P2
P2
Config Register
Hex Code
0
1
11
P6
2
Comment
Filter and FETs are required to
eliminate temperature sense pulses.
See APPLICATION SCHEMATICS.
12
P5
43
12
P5
93
13
P4
44
13
P4
94
The port used for the Alert output will depend on the mode setting in LED/Comm Configuration as defined in
Table 14. The default mode is 0. The Alert pin will be asserted by driving LOW. However, note that in LED/COM
mode 2, pin TS/P6, which has a dual purpose as temperature sense pin will be driven low except when
temperature measurements are made each second. Refer to the reference schematic for filter implementation
details if host alert sensing requires a continuous signal.
The Alert pin will be a logical OR of the selected bits in the new configuration register when asserted in the Flags
register. Default value for Alert Configuration register is 0.
High Byte
Low Byte
Bit 7
OTC
OCVTAKEN
Table 15. Alert Configuration Register Bit Definitions
Bit 6
OTD
ISD
Bit 5
BATHIGH
TDD
Bit 4
BATLOW
RSVD
Bit 3
CHG_INH
RSVD
Bit 2
RSVD
SOC1
Bit 1
FC
SOCF
Bit 0
CHG
DSG
OTC: Over-Temperature in Charge condition is detected. Alert enabled when set.
OTD: Over-Temperature in Discharge condition is detected. Alert enabled when set.
BATHIGH: Battery High bit indicating a high battery voltage condition. Refer to the data flash
BATTERY HIGH parameters for threshold settings. Alert enabled when set.
BATLOW: Battery Low bit indicating a low battery voltage condition. Refer to the data flash BATTERY
LOW parameters for threshold settings. Alert enabled when set.
CHG_INH: Charge Inhibit: unable to begin charging [Charge Inhibit Temp Low, Charge Inhibit
Temp High]. Alert enabled when set.
RSVD: Reserved. Do not use.
FC: Full-charge is detected. FC is set when charge termination is reached and FC Set% = –1.
(See CHARGING AND CHARGE TERMINATION INDICATION for details) or State of
Charge is larger than FC Set% and FC Set% is not –1. Alert enabled when set.
CHG: (Fast) charging allowed. Alert enabled when set.
OCVTAKEN: Cleared on entry to relax mode and set to 1 when OCV measurement is performed in relax
mode. Alert enabled when set.
ISD: Internal Short is detected. Alert enabled when set.
TDD: Tab Disconnect is detected. Alert enabled when set.
SOC1: State-of-Charge Threshold 1 reached. Alert enabled when set.
SOCF: State-of-Charge Threshold Final reached. Alert enabled when set.
DSG: Discharging detected. Alert enabled when set.
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