Using the LCD with a Personal Computer -continued
3)Control sequence
(1)The command from a personal computer to the LCD monitor will take 400ms.
(2)The LCD monitor will send a return command 400ms* after it has received an encode. If the command isn't received correctly, the LCD monitor will not send the return command.
(3)The personal computer checks the command and confirms if the command which has been sent has been executed or not.
(4)This LCD monitor sends various codes other than the return code. When sending a control sequence via
*: The sending time of the return command may be delayed depending on the monitor's current activity (changing of the input signal, etc.).
[Example] Turn the power ON ( ' ' is for ASCII code)
Sending commands | Status code from LCD | Meaning | |
from the PC etc. | monitor | ||
| |||
30 30 21 0D |
| Command for POWER ON | |
'0' '0' '!' ' ' |
| ||
|
| ||
| 30 30 21 0D | Command received | |
| '0' '0' '!' ' ' | (Command echo back) |
4) Operation commands
The operation commands execute the basic operation setting of this LCD monitor. It may not operate when changing the signal:
Operation | ASCII | HEX |
POWER ON | ! | 21h |
POWER OFF | " | 22h |
INPUT RGB 1 | _r1 | 5Fh 72h 31h |
INPUT RGB 2 | _r2 | 5Fh 72h 32h |
INPUT RGB 3 | _r3 | 5Fh 72h 33h |
INPUT VIDEO | _v1 | 5Fh 76h 31h |
INPUT DVD/HD | _v2 | 5Fh 76h 32h |
INPUT | _v3 | 5Fh 76h 33h |
•POWER OFF command should not be used less than 1 minute after the power is turned on.
•POWER ON command should not be used less than 1 minute after the power is turned off.
•
5)Read command
Host computer sends the command without
After receiving this command, the monitor returns the command with
<ex> When Host computer checks the Power status of monitor, the status of monitor is
Command from computer | Command from Monitor | Detail of command |
30 30 76 50 0D |
| Ask about the power |
'0''0''v''P'[enter] | 30 30 76 50 31 0D | status of monitor. |
| '0''0''v''1'[enter] | Monitor is |
|
|
|
AV 
Denotes an AV unit function.
All AV functions are enabled when the AV unit is installed.
