BQ27620-G1 Datasheet, PDF (30/45 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27620-G1
SLUSAE3 – OCTOBER 2012
www.ti.com
Some bq27620-G1 pins are configured via the Operation Configuration B data flash register, as
indicated in Table 5-4. This register is programmed/read via the methods described in Section 4.2.1:
Accessing the Data Flash. The register is located at subclass = 64, offset = 9.
Table 5-4. Operation Configuration B Bit Definition
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Byte
WRTEMP
BIE
BL_INT GNDSEL
FCE
DFWrIndBL RFACTSTE INDFACRE
P
S
Default=
0
1
0
0
1
0
1
1
0x4B
WRTEMP = Enables the temperature write. The temperature could be written by the host. True when set.
BIE = Battery insertion detection enable. When the battery insertion detection is disabled, the gauge relies on the host command to set the
BAT_DET bit. True when set.
BL_INT = Battery low interrupt enable. True when set.
GNDSEL = The ADC ground select control. The Vss (Pin D1) is selected as ground reference when the bit is clear. Pin A1 is selected when
the bit is set.
FCE = The Fast Convergence Enabled.
DFWrIndBL = DataFlash Write Indication. SOC_INT is used for indication if the bit is clear. BAT_LOW is used for indication if the bit is set.
RFACTSTEP = Enables Ra Step up/down to Min/Max Res Factor before disabling Ra updates.
INDFACRES = Although the default is '1', the function associated with this bit has been removed from firmware.
Table 5-5. Operation Configuration C Bit Definition
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Byte
BATGSPUE BATGWPU BATLSPUE BATLWPUE
N
EN
N
N
VCCE
–
DeltaVOpt1 DeltaVOpt0
Default =
0
0
1
0
1
0
0
0
0x28
BATGSPUEN = BAT_GD pin strong pull-up enable.
BATGWPUEN = BAT_GD pin weak pull-up enable.
BATLSPUEN = BAT_LOW pin strong pull-up enable.
BATLWPUEN = BAT_LOW pin weak pull-up enable.
VCCE = Voltage Consistency Check Enable.
DeltaVOpt[1:0] = Configures options for determination of Delta Voltage which is defined as the maximum difference in Voltage( ) during
normal load and short load spikes. Delta Voltage is a used as a compensation factor for calculating for RemainingCapacity( ) under pulsed
loads.
0/0 = Standard DeltaV. Average variance from steady state voltage used to determine end of discharge voltage. (Default)
0/1 = No Averaging. The last instantaneous change in Voltage( ) from steady state is used to determine the end of discharge voltage.
1/0 = Use the value in Min Delta Voltage.
1/1 = Not used.
5.3.2 Pin Function Code Descriptions
This fuel gauge has several pin-function configurations available for the end application. Each
configuration is assigned a pin function code, or PFC, specified by Op Config [PFC_CFG1, PFC_CFG0].
(see Table 5-6 below.) If the fuel gauge is configured to measure external temperature via Op Config
[TEMPS], a voltage bias of approximately 125 mSec will be applied periodically to the external thermistor
network in order to make a temperature measurement.
30
FUNCTIONAL DESCRIPTION
Submit Documentation Feedback
Product Folder Links: bq27620-G1
Copyright © 2012, Texas Instruments Incorporated