Lcm Function Specification; System Information; Data Transaction Method; Ax93304 Function Command - AXIOMTEK AX93304 User Manual

2.1

System Information

1. The host system communicates with LCM module through COM PORT
a. Baud Rate = 9600
b. Data Bits = 8
c. Stop Bits = 1
d. Parity Check = None
2. COM Port only use two signal wires for Tx & Rx
3. The host system and the LCM module connect with each other by the pin to pin cable
4. LCM is for 2x16 character display. It can show 16 characters per row, supporting up to 32
characters in two rows. If the string length is over 32 characters, additional will be stored
in the RAM of LCM. However, the additional will not be shown off.
2.2

Data transaction method

The transaction is to call API Library by the sample code, then to active the function call.
2.3

AX93304 Function Command

To get the key pressing status, a "read key" command can be issued to this module, which will
check the key-pressing status and reply accordingly. The following are the commands which
we can provide.
1. Backlight Control Mode(0xFB, 0xFC):
Transmit one byte ASCII 0xFB to turn on LCM backlight
Transmit one byte ASCII 0xFC to turn off LCM backlight
2. Keypad listen Mode(0xFD):
Transmit one byte ASCII 0xFD to listen key pressing status
3. Command Mode(0xFE):
Command function
1. Clear LCM
2. Home cursor
3. LCM Display off
4. LCM Display on
5. Cursor on
6. Cursor blink on
7. Shift cursor left
8. Shift cursor right
9. Shift display left
10. Shift display right
11. Set CGRAM address
12. Set cursor position

LCM Function specification

LCM Function specification
1 byte command header
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
out(0xFEh)
1 byte command function
0xFEh
AX93304 User's Manual
Chapter 2
0x??h
out(0x01h)
out(0x02h)
out(0x08h)
out(0x0Ch)
out(0x0Dh)
out(0x0Eh)
out(0x10h)
out(0x14h)
out(0x18h)
out(0x1Ch)
out(0x40h+offset)
out(0x80h+Location)
3