AD7879 datasheet(22/36 Pages) AD

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AD7879

Rev. 0 | Page 22 of 36

Table 12. Control Register 3

Address

Name

Data

Bit

Description

Default

Value

0x03

TEMP MASK

TEMP mask bit

0x0000

0 = temperature measurement is allowed to cause interrupt

1 = temperature measurement is not allowed to cause interrupt

X/VBAT

MASK

AUX/VBAT mask bit

0 = AUX/VBAT measurement is allowed to cause interrupt

1 = AUX/VBAT measurement is not allowed to cause interrupt

INT MODE

DAV/INT mode select

0 = enable DAV mode

1 = enable INT mode

Note that this bit overrides any mask bits associated with individual channels

GPIO ALERT

GPIO interrupt enable

0 = GPIO can cause an alert on the INT output

1 = mask GPIO from causing an alert on the INT output

AUX/VBAT LOW

1 = AUX/VBAT below low limit

AUX/VBAT HIGH

1 = AUX/VBAT above high limit

TEMP LOW

1 = TEMP below low limit

TEMP HIGH

1 = TEMP above high limit

X+

1 = include measurement of Y position (X+ input)

Y+

1 = include measurement of X position (Y+ input)

1 = include Z1 touch pressure measurement (X+ input)

1 = include measurement of Z2 touch pressure measurement (Y− input)

AUX

1 = include measurement of AUX channel1

VBAT

1 = include measurement of battery monitor (VBAT)1

TEMP

1 = include temperature measurement

Not used

Unused

1 If GPIO is enabled, AUX and VBAT are both ignored. If AUX and VBAT are both selected, and GPIO is disabled, AUX is ignored, and VBAT is measured.

Table 13. Limit Registers

Address

Data Bit

Description

Default Value

0x04

15:0

User-programmable AUX/VBAT high limit register

0x0000

0x05

15:0

User-programmable AUX/VBAT low limit register

0x0000

0x06

15:0

User-programmable TEMP high limit register

0x0000

0x07

15:0

User-programmable TEMP low limit register

0x0000

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