AR1010T-I/ML(2016) View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

AR1010T-I/ML
(Rev.:2016)

AR1000 Series Resistive Touch Screen Controller

Microchip Technology 

AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER

7.0 TOUCH REPORTING

PROTOCOL

Touch coordinates are sent from the controller to the

host system in a 5-byte data packet, which contains the

X-axis coordinate, Y-axis coordinate, and a “Pen-Up/

Down” touch status.

The range for X-axis and Y-axis coordinates is from 0-

4095 (12-bit). The realized resolution is 1024, and bits

X1:X0 and Y1:Y0 are zeros.

It is recommended that applications be developed to

read the 12-bit coordinates from the packet and use

them in a 12-bit format. This enhances the application

robustness, as it will work with either 10 or 12 bits of

coordinate information.

The touch coordinate reporting protocol is shown below

in Table 7-1.

TABLE 7-1: TOUCH COORDINATE REPORTING PROTOCOL

Byte #

Bit 7

Bit 6

1

1

R

2

0

X6

3

0

0

4

0

Y6

5

0

0

where:

• P: 0 Pen Up, 1 Pen Down

• R: Reserved

• X11-X0: X-axis coordinate

• Y11-Y0: Y-axis coordinate

Bit 5

R

X65

0

Y5

0

Bit 4

R

X4

X11

Y4

Y11

Bit 3

R

X3

X10

Y3

Y10

Bit 2

R

X2

X9

Y2

Y9

Bit 1

R

X1

X8

Y1

Y8

Bit 0

P

X0

X7

Y0

Y7

 2009-2016 Microchip Technology Inc.

DS40001393C-page 23

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