AR1100 Datasheet, PDF (35/58 Pages) Microchip Technology – AR1100 Resistive USB and RS-232 Touch Screen Controller

AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
8.4 Command: INIT
Initialize the boot load process – executed as the first
step after Reset.
COMMAND PACKET:
TABLE 8-6: COMMAND: INIT
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
0x01 SIZE
3
0xF1 COMMAND
RESPONSE PACKET:
TABLE 8-7: RESPONSE: INIT
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
2
SIZE
3
STATUS STATUS
4
0xF1 COMMAND
8.5 Command: WRITE
The WRITE command facilitates programming Flash or
EEPROM. The Most Significant Byte of the 24-bit
address in the WRITE command dictates the destina-
tion. The AR1100 maps Flash to 0x000000 and
EEPROM, to 0xF00000.
COMMAND PACKET:
TABLE 8-8: COMMAND: WRITE
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
N+4
SIZE (N = # of data bytes
to write)
3
0xF2
COMMAND
4
ADDR 07:00 ADDRESS
5
ADDR 15:08
6
ADDR 23:16
7
[DATA 1] DATA (to be written)
...
...
N+6
[DATA N]
RESPONSE PACKET:
TABLE 8-9: RESPONSE: WRITE
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
2
SIZE
3
STATUS STATUS
4
0xF2 COMMAND (WRITE)
8.6 Command: READ
Read from device Flash or EEPROM.
REMINDER: Flash data will be encrypted while
EEPROM data will not be encrypted.
COMMAND PACKET:
TABLE 8-10: COMMAND: READ
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
0x05
SIZE
3
0xF3
COMMAND
4
ADDR 07:00 ADDRESS
5
ADDR 15:08
6
ADDR 23:16
7
N
# Bytes to Read
RESPONSE PACKET:
TABLE 8-11: RESPONSE: READ
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
N+2
SIZE (N = # of data bytes
to read)
3
STATUS STATUS
4
0xF3
COMMAND
5
[DATA 1]
6
...
7
[DATA N]
 2011 Microchip Technology Inc.
DS41606B-page 35