AD7889 datasheet(24/40 Pages) AD

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AD7879/AD7889

Data Sheet

Rev. D | Page 24 of 40

Table 14. Control Register 3

Address

Bit 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.

AUX/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.

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 channel.1

VBAT

1 = include measurement of battery monitor (VBAT).1

TEMP

1 = include temperature measurement.

Not used

Unused.

1 If GPIO is enabled in Control Register 2 (Bit 13), 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 15. Limit Registers

Address

Data Bit

Description

Default Value

0x04

AUX/VBAT high limit

[15:0]

User-programmable AUX/VBAT high limit register

0x0000

0x05

AUX/VBAT low limit

[15:0]

User-programmable AUX/VBAT low limit register

0x0000

0x06

TEMP high limit

[15:0]

User-programmable TEMP high limit register

0x0000

0x07

TEMP low limit

[15:0]

User-programmable TEMP low limit register

0x0000

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