AD7889 Analog Devices, AD7889 Datasheet - Page 21

• Manufacturer Part Number: AD7889
• Description: Low Voltage Controller for Touch Screens
• Manufacturer: Analog Devices

Specifications of AD7889

• Resolution (bits): 12bit
• # Chan: 6
• Sample Rate: 105kSPS
• Interface: I²C/Ser 2-Wire,Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: CSP

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