AR1020-I/ML Microchip Technology, AR1020-I/ML Datasheet - Page 22

• Manufacturer Part Number: AR1020-I/ML
• Description: IC TOUCH SCREEN CTRLR 20-QFN
• Manufacturer: Microchip Technology
• Type: Resistiver

Specifications of AR1020-I/ML

• Resolution (bits): 10 b
• Touch Panel Interface: 4-Wire, 5-Wire, 8-Wire
• Number Of Inputs/keys: 3 Key
• Data Interface: I²C, Serial, SPI™
• Voltage - Supply: 3.3 V ~ 5.5 V
• Current - Supply: 17mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Voltage Supply Source: Single Supply
• Controller Type: Touch Screen
• Ic Interface Type: I2C, SPI
• Supply Voltage Range: 3.3V To 5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: QFN
• No. Of Pins: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sampling Rate (per Second): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

7.14 Command Response
A received command will be responded to as follows.
<Header><DataSize><Response><Command><Data>…<Data>
7.15 Commands
7.15.1 Enable Touch - 0x12
Controller will send touch coordinate reports for valid touch conditions.
Send
Receive : <0x55><0x02><Response><0x12>
7.15.2 Disable Touch - 0x13
Controller will not send any touch coordinate reports. A touch will, however, still wake up the controller if asleep.
Send
Receive : <0x55><0x02><Response><0x13>
DS41393A-Page 18
<Header> is defined as a value of 0x55 and is used to mark the beginning of the response packet.
<DataSize> is the number of bytes being sent in the response packet, after <DataSize>.
<Response> is a returned status to the received command.
<Command> is a confirmation of the command being responded to.
<Data> represent from zero to eight bytes of returned data.
Command
Table 9 : Command Set Summary
: <0x55><0x01><0x12>
: <0x55><0x01><0x13>
Value
0x2B
0x12
0x13
0x14
0x20
0x21
0x22
0x23
0x28
0x29
Value Description
0x00
0x01
0x03
0x04
0xFC
Enable Touch
Disable Touch
Calibrate Mode
Register Read
Register Write
Register Start Address Request
Registers Write to Eeprom
EEPROM Read
EEPROM Write
EEPROM Write to Registers
Success
Unrecognized Command
Unrecognized Header
Command Timeout (entire command not received within 100ms)
Calibration Cancel
Command Description
© 2009 Microchip Technology, Inc.