Datasheet

AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
DS41606B-page 36  2011 Microchip Technology Inc.
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:
RESPONSE PACKET:
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 Ta bl e 8-1 6.
COMMAND PACKET:
RESPONSE PACKET:
The boot load “MODE CODE” (referenced above) is a
1-byte value saved in nonvolatile memory to indicate
boot status.
TABLE 8-12: COMMAND: FLUSH
BYTE# VALUE DESCRIPTION
1 0x55 SYNC
20x01SIZE
3 0xF4 COMMAND
TABLE 8-13: RESPONSE: FLUSH
BYTE# VALUE DESCRIPTION
1 0x55 SYNC
22SIZE
3 STATUS STATUS
4 0xF4 COMMAND
TABLE 8-14: COMMAND: WRITE_MODE
BYTE# VALUE DESCRIPTION
1 0x55 SYNC
20x05SIZE
3 0xF5 COMMAND
4n/a
5n/a
6n/a
7 M 1_Byte mode Code
TABLE 8-15: RESPONSE: WRITE_MODE
BYTE# VALUE DESCRIPTION
1 0x55 SYNC
22SIZE
3 STATUS STATUS
4 0xF5 COMMAND
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