Datasheet

AD7879/AD7889
Rev. C | Page 21 of 40
REGISTER MAP
Table 11. Register Table
Address
1
Register Name Description Default Value Type
0x00 Unused Unused 0x0000
R/W
0x01 Control Register 1
Pen interrupt enable, channel selection for manual conversion,
ADC mode, acquisition time, and conversion timer
0x0000
R/W
0x02 Control Register 2
ADC power management, GPIO control, pen interrupt mode,
averaging, median filter, software reset, and FCD
0x4040
R/W
0x03 Control Register 3
Status of high/low limit comparisons for TEMP and AUX/VBAT,
and enable bits to allow them to become interrupts; channel
selection for slave/master mode
0x0000
R/W
0x04 AUX/VBAT high limit AUX/VBAT high limit for comparison 0x0000
R/W
0x05 AUX/VBAT low limit AUX/VBAT low limit for comparison 0x0000
R/W
0x06 TEMP high limit TEMP high limit for comparison 0x0000
R/W
0x07 TEMP low limit TEMP low limit for comparison 0x0000
R/W
0x08 X+ X+ measurement for Y position 0x0000 R
0x09 Y+ Y+ measurement for X position 0x0000 R
0x0A X+ (Z1) X+ measurement for touch-pressure calculation (Z1) 0x0000 R
0x0B Y− (Z2) Y− measurement for touch-pressure calculation (Z2) 0x0000 R
0x0C AUX/VBAT AUX/VBAT voltage measurement 0x0000 R
0x0D TEMP Temperature conversion measurement 0x0000 R
0x0E Revision and device ID Revision and device ID
0x0379
(AD7879-1/AD7889-1)
R
0x037A
(AD7879/AD7889)
R
1
Do not write to addresses outside the register map.