AD7877_17 datasheet(35/46 Pages) AD

Numer części	AD7877

Szczegółowy opis	Touch Screen Controller

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AD7877

Data Sheet

Table 15. Read Register Map

Register Address

Binary

RADD4

RADD3

RADD2

RADD1

RADD0

Hex

Register Name

Description

0

00

None

Reads back all zeros

0

1

01

Control Register 1

See Table 13

0

1

0

02

Control Register 2

See Table 13

0

1

03

Alert status/enable

register

See Table 13

0

1

0

04

AUX1 high limit

See Table 13

0

1

0

1

05

AUX1 low limit

See Table 13

0

1

0

06

BAT1 high limit

See Table 13

0

1

07

BAT1 low limit

See Table 13

0

1

0

08

BAT2 high limit

See Table 13

0

1

0

1

09

BAT2 low limit

See Table 13

0

1

0

1

0

0A

TEMP1 low limit

See Table 13

0

1

0

1

0B

TEMP1 high limit

See Table 13

0

1

0

0C

Sequencer Register 0

See Table 13

0

1

0

1

0D

Sequencer Register 1

See Table 13

0

1

0

0E

DAC register

See Table 13

0

1

0F

None

Factory use only

1

0

10

X+

Measurement at X+ input for Y position

1

0

1

11

Y+

Measurement at Y+ input for X position

1

0

1

0

12

Y− (Z2)

Measurement at Y− input for touch-pressure

calculation Z2

1

0

1

13

AUX1

Auxiliary Input 1 measurement

1

0

1

0

14

AUX2

Auxiliary Input 2 measurement

1

0

1

0

1

15

AUX3

Auxiliary Input 3 measurement

1

0

1

0

16

BAT1

Battery Input 1 measurement

1

0

1

17

BAT2

Battery Input 2 measurement

1

0

18

TEMP1

Single-ended temperature measurement

1

0

1

19

TEMP2

Differential temperature measurement

1

0

1

0

1A

X+ (Z1)

Measurement at X+ input for touch-pressure

calculation Z1

1

0

1

1B

GPIO Control

Register 1

See Table 14

1

0

1C

GPIO Control

Register 2

See Table 14

1

0

1

1D

GPIO data

See Table 14

1

0

1E

None

Factory use only

1

1F

None

Factory use only

Rev. E | Page 34 of 45

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