ISL6295 Datasheet, PDF (18/25 Pages) Intersil Corporation – Low Voltage Fuel Gauge

ISL6295
A/D CONTROL REGISTERS
The eight A/D control registers are defined as follows:
A/D Reg NAME
FUNCTION
ADc0
Ictrl Current measurement control
ADc1
Itctrl Internal temperature
measurement control
ADc2
Etctrl
External temperature
measurement control
ADc3
VPctrl Pack voltage measurement
control
ADc4
Reserved
ADc5
GPADctrl GPAD voltage measurement
control
ADc6
OFFSctrl Offset measurement control
ADc7
AUXctrl Auxiliary measurement control
Addr
42h
46h
4Ah
4Eh
52h
56h
5Ah
5Eh
The eight A/D control registers contain the following bits:
7
Enable
65 4
Resolution
3
Reference
210
Select
Enable
A/D Measurement enable: Setting this bit
enables the A/D measurements defined by bits
0-6.
Resolution A/D Resolution selection: These 3 bits control
the magnitude resolution of the A/D
measurement performed for the corresponding
A/D result register as follows:
RESOLUTION
0
1
2
3
4
5
6
7
# BIT CONVERSION
8-bit conversion
9-bit conversion
10-bit conversion
11-bit conversion
12-bit conversion
13-bit conversion
14-bit conversion
15-bit conversion
Reference A/D Reference selection: Selects the reference
voltage used for the pending A/D conversion.
0 = 170mV reference (for differential conversion)
1 = 340mV reference (for single-ended
conversion)
Select
A/D Input selection: Selects the analog
multiplexer input for the pending A/D conversion
as follows:
Select = 0: Current (SR pin voltage)
Select = 1: Internal temperature sensor
Select = 2: External temperature sensor (NTC
pin voltage)
Select = 3: Pack Voltage
Select = 4: Reserved
Select = 5: GPAD Voltage
Select = 6: Offset voltage
Select = 7: Offset voltage
In order for the A/D control registers to function according to
their names, their select fields should be programmed as
follows:
A/D REG. #
ADc0
ADc1
ADc2
ADc3
ADc4
ADc5
ADc6
ADc7
NAME
Ictrl
Itctrl
Etctrl
VPctrl
Rsvd
GPADctrl
OFFSctrl
AUXctrl
SELECT VALUE
0
1
2
3
5
6
X
A/D RESULT REGISTERS
The eight 16-bit A/D result registers are defined as follows:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Sign
Magnitude
A/D
REG NAME
FUNCTION
ADr0 Ictrl Current measurement result
ADr1 Itctrl Internal temperature measurement
result
ADr2
Etctrl
External temperature measurement
result
ADr3 VPctrl Pack voltage measurement result
ADr4 Reserved
ADr5 GPADctrl GPAD Voltage measurement result
ADr6 OFFSctrl Offset measurement result
ADr7 AUXctrl Auxiliary measurement result
ADDR
40h
44h
48h
4Ch
54h
58h
5Ch
18
FN9074.0
October 25, 2005