AR1011 datasheet(20/61 Pages) MICROCHIP

Part #	AR1011

Description	AR1000 Series Resistive Touch Screen Controller

PDF	61 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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20 / 61 page

AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER

DS40001393C-page 20

 2009-2016 Microchip Technology Inc.

5.5

Command Protocol

The AR1021 controller receives commands from the

host as follows:

• The host clocks the bytes of a command to the

AR1021 controller.

• The AR1021 controller asserts the SIQ interrupt

pin high when it is ready with a response to the

command sent by the host.

• The host clocks out the bytes of the command

response from the AR1021 controller.

• The AR1021 controller clears the SIQ interrupt pin

low, after the first byte of the command response

has been clocked out by the host.

The communication protocol for the host sending the

ENABLE_TOUCH

command to the AR1021 controller is

shown below in Figure 5-2.

FIGURE 5-2:

SPI TIMING DIAGRAM – COMMAND PROTOCOL (ENABLE_TOUCH)

5.6

SPI Bit Timing – General

General timing waveforms are shown below in

Figure 5-3.

FIGURE 5-3:

SPI GENERAL BIT TIMING WAVEFORM

AR1011 Datasheet(PDF) 20 Page - Microchip Technology