AD7879 datasheet(21/40 Pages) AD

21 / 40 page

Data Sheet

AD7879/AD7889

Rev. D | Page 21 of 40

Table 11. Register Table

Address1

Description

Default Value

Type

0x00

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

0x09

Y+

Y+ measurement for X position

0x0000

0x0A

X+ (Z1)

X+ measurement for touch pressure calculation (Z1)

0x0000

0x0B

Y− (Z2)

Y− measurement for touch pressure calculation (Z2)

0x0000

0x0C

AUX/VBAT

AUX/VBAT voltage measurement

0x0000

0x0D

TEMP

Temperature conversion measurement

0x0000

0x0E

Revision and device ID

0x0379 (AD7879-1/AD7889-1)

0x037A (AD7879/AD7889)

1 Do not write to addresses outside the register map.

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