AR1100 Datasheet, PDF (23/58 Pages) Microchip Technology – AR1100 Resistive USB and RS-232 Touch Screen Controller

AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
5.6 Command: REG_WRITE
Write one or more operational registers.
COMMAND PACKET:
TABLE 5-11: COMMAND: REG_WRITE
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
N+2
SIZE (N = # of REGS to
WRITE)
3
0x21
COMMAND
4
0x00
REGISTER ADDRESS
(MSB)
5
ADR
REGISTER ADDRESS
(LSB)
6
REG[ADR] REGISTER VALUE
...
...
REGISTER VALUE(S)
5+N REG[ADR+N-1] REGISTER VALUE
RESPONSE PACKET:
TABLE 5-12: RESPONSE: REG_WRITE
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
0x02
SIZE
3
STATUS STATUS
4
0x21
COMMAND
5.7 Command: EE_READ
Read one or more bytes from EEPROM.
COMMAND PACKET:
TABLE 5-13: COMMAND: EE_READ
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
0x04
SIZE
3
0x28
COMMAND
4
0x00
EE ADDRESS (MSB)
5
ADR
EE ADDRESS (LSB)
6
N
Number of bytes to read
RESPONSE PACKET:
TABLE 5-14: RESPONSE: EE_READ
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
N+2
SIZE (N = # of BYTES to
WRITE)
3
STATUS STATUS
4
0x28
COMMAND
5
EE[ADR] EE VALUE
...
...
EE VALUE VALUE(S)
4+N EE[ADR+N-1] EE VALUE
5.8 Command: EE_WRITE
Write one or more bytes to EEPROM.
COMMAND PACKET:
TABLE 5-15: COMMAND: EE_WRITE
BYTE#
VALUE
DESCRIPTION
1
0x55
SYNC
2
4+N
SIZE (N = # of REGS to
WRITE)
3
0x29
COMMAND
4
0x00
EE ADDRESS (MSB)
5
ADR
EE ADDRESS (LSB)
6
EE[ADR] EE VALUE
...
...
EE VALUE(S)
5+N EE[ADR+N-1] EE VALUE
RESPONSE PACKET:
TABLE 5-16: RESPONSE: EE_WRITE
BYTE# VALUE
DESCRIPTION
1
0x55 SYNC
2
2
SIZE
3
STATUS STATUS
4
0x29 COMMAND
 2011 Microchip Technology Inc.
DS41606B-page 23