AR1100 Datasheet, PDF (34/58 Pages) Microchip Technology – AR1100 Resistive USB and RS-232 Touch Screen Controller

AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
8.1 Command Summary
The boot load operation uses the same data format/
protocol as the touch application. Commands are
described below.
TABLE 8-1: COMMAND SUMMARY
CMND
NAME
0x01
0xF0
0xF1
0xF2
0xF3
0xF4
0xF5
VERSION
RESET
INIT
WRITE
READ
FLUSH
WRITE_MODE
STATUS code(s) returned in RESPONSE packet.
TABLE 8-2: COMMAND STATUS SUMMARY
CODE
NAME
0x00
0x01
OK
BAD PACKET
DESCRIPTION
Return version number and mode
Software device Reset
Initialize boot loader
Write-memory contents
Read-memory contents
Flush Flash cache
Write nonvolatile BOOT mode value
DESCRIPTION
No error
Packet was malformed, unrecognized or timed out
8.2 Command: VERSION
Request firmware version packet – includes Boot
mode.
COMMAND PACKET:
TABLE 8-3: COMMAND: VERSION
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
0x01 SIZE
3
0x01 COMMAND
RESPONSE PACKET:
TABLE 8-4: RESPONSE: VERSION
BYTE# VALUE
DESCRIPTION
1 0x55
SYNC
2 0x06
SIZE
3 STATUS
STATUS
4 0x01
COMMAND
6 VER_MAJOR VERSION (Major)
7 VER_MINOR VERSION (Minor)
8 VER_REV VERSION (Revision – inter-
nal)
9 MODE
Boot mode
0: Normal
1: Write boot – upper Flash
2: Write application – lower
3: Write application – upper
8.3 Command: RESET
Execute a device Reset. If in USB mode, the device will
detach from the bus and re-enumerate.
COMMAND PACKET:
TABLE 8-5: COMMAND: RESET
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
0x01 SIZE
3
0xF0 COMMAND
RESPONSE PACKET:
None.
DS41606B-page 34
 2011 Microchip Technology Inc.