LV7565_Basic_Command_Specification

Basic Serial Command Specification Page 4 of 20
3. Notes for Communications
3.1. The projector command is defined one command/one line that starts “C” and ends carriage
return (0x0D).
3.2. When a projector receives carriage return (0x0D), it starts decoding.
3.3. There are two type commands, functional execution commands and state read commands.
Functional execution commands works as a remote control and key on the projector, and State
read command works to know the projector status.
Example of Functional Execution Command : “C05” [CR]
Example of State Read Command : “CR0” [CR]
3.4. When it takes more than one second to receive on command, it clears information of buffer.
(Until the projector receives the carriage return since the projector has received the first data)
3.5. When control command pipelining, after the response, wait interval of time as below.
3.5.1. [VOLUME + / -] [ZOOM UP / DOWN] [FOCUS UP / DOWN]
[LENS-SHIF UP / DOWN / LEFT / RIGHT] Commands ! 100ms
3.5.2. Other Commands ! 500ms
3.6. Wait at least 500ms after the response, when status read command pipelining.
3.7. Do not issue command before the Response in the situation as below, except no response after 5
seconds.
3.8. It takes about 7 seconds for internal initialization after plugging in AC. During this time, it
cannot process command. Do not issue any commands.
3.9. 7 seconds after Stand By or Power ON, Even when a projector receives a command, a computer
receives acceptable response, but it does not execute for internal initialization and lamp
lighting process. However, Status Read Commands are executed after 500ms when they
receive acceptable response.
3.10. About performance during processing count down or cooling down.
When a projector receives After Stand By or Power ON, Even when a projector receives a
command, a computer receives response to accept the command, but it does not execute for
internal initialization and lamp lighting process. However, Status Read Commands are
executed after 500ms when a computer receives acceptable response.
When a projector receives a command while processing count down after Power ON or
cooling down after Power Off, a computer receives response to accept the command but the
command is not executed. However, Status Read Commands are executed.
3.11. About performance when changing INPUT
After receiving INPUT-switching command, when receiving commands between 5 seconds
from starting the switching to completing the switching, a computer receives acceptable
command, but it is not executed.
However, status read commands are executed after a computer receives response to accept
the command, after 500ms.
3.12. Response command characters for status read success are different.
See “7, State Read Command” for the details.
3.13. Command are shown in a capital letter (A ～ Z). Lower case letters are not available.