AR1100 Datasheet, PDF (36/58 Pages) Microchip Technology – AR1100 Resistive USB and RS-232 Touch Screen Controller

AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
8.7 Command: FLUSH
The FLUSH command is required to write/flush any
data remaining in the internal cache at the end of a boot
load session.
COMMAND PACKET:
TABLE 8-12: COMMAND: FLUSH
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
0x01 SIZE
3
0xF4 COMMAND
RESPONSE PACKET:
TABLE 8-13: RESPONSE: FLUSH
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
2
SIZE
3
STATUS STATUS
4
0xF4 COMMAND
8.8 Command: WRITE_MODE
The WRITE_MODE command is used to change the
operational mode of the bootloader. The four modes
are described in Table 8-16.
COMMAND PACKET:
TABLE 8-14: COMMAND: WRITE_MODE
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
0x05
SIZE
3
0xF5
COMMAND
4
n/a
5
n/a
6
n/a
7
M
1_Byte mode Code
RESPONSE PACKET:
TABLE 8-15: RESPONSE: WRITE_MODE
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
2
SIZE
3
STATUS STATUS
4
0xF5 COMMAND
The boot load “MODE CODE” (referenced above) is a
1-byte value saved in nonvolatile memory to indicate
boot status.
TABLE 8-16: WRITE_MODE CODES
Value
Description
0x00 Normal mode (application)
0x01 Programming/Flashing ‘upper’ application
0x02 Programming/Flashing ‘lower’ application
0x03 Programming/Flashing temporary ‘boot’
module
DS41606B-page 36
 2011 Microchip Technology Inc.