Canon LV S3 - SVGA LCD Projector Specification

0.5” SVGA LV-S3

SERIAL FUNCTIONAL SPECIFICATION

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-CONTENT-

1. Overview

2. Interface Specification

3. Connection

4. Notes for Communication

5. Functional Execute Command Table

6. Status Read Command Table

7. Functional Execution Command Table

7.1 Format

7.2 When the command pipelining is needed

7.3 Transfer Example

7.4 Operation Requirements

7.5 Power ON Command

7.6 Power OFF Command (Quick POWER OFF)

7.7 Power OFF Command

7.8 Computer Command

7.9 Video Command

7.10 Volume + Command

7.11 Volume – Command

7.12 Audio Mute ON Command

7.13 Audio Mute OFF Command

7.14 Video Mute ON Command

7.15 Video Mute OFF Command

7.16 Screen Normal Size Command

7.17 Screen Wide Size Command

7.18 Image Standard Command

7.19 Image High contrast Command

7.20 Image Cinema Command

7.21 Image Custom Command

7.22 Menu ON Command

7.23 Menu OFF Command

7.24 Display Clear Command

7.25 Brightness + Command

7.26 Brightness – Command

7.27 Image (Toggle) Command

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7.28 Power Management Ready Command

7.29 Power Management OFF Command

7.30 Power Management Shut Down Command

7.31 D.Zoom + Command

7.32 D.Zoom - Command

7.33 Video Auto Command

7.34 Video Video Command

7.35 Video S-Video Command

7.36 Pointer Right Command

7.37 Pointer Left Command

7.38 Pointer Up Command

7.39 Pointer Down Command

7.40 Enter Command

7.41 Freeze ON Comman d

7.42 Freeze OFF Comman d

7.43 Computer Analo g RGB Command

7.44 Computer Scart Command

7.45 Computer Component Command

7.46 Page Up Command

7.47 Page Down Command

7.48 Auto PC Adj. Command

7.49 Presentation Timer Command

7.50 Keystone Up Command

7.51 Keystone Down Command

8. State Read Command

8.1 Format

8.2 Transfer Example

8.3 Status Read Command

8.4 Input Mode Read Command

8.5 Lamp Time Read Command

8.6 Setting Read Command

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1. Overview

1.1 This Specification defines projector control commands for LV-S3 (0.5”SVGA model).

1.2 The projector control commands are for controlling projector through RS232C from a computer.

2. Interface Specification
Specification

Shynchro system Asynchronous
Transmission Speed 9600 / 19200
Data Length 8 bit
Parity None
Stop Bit 1
Flow Control None

1. Transfer rate: initial setting value is 19200

2. Transfer rate can be changed by service mode

3. Connection

The serial cable that is specified in the specification as below must be used for a connection to
a computer and a projector.

PC Projector

COM No. 1  Control Port

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8

CD

SG

RXD

TXD

DTR

DSR

RTS
CTS

RING

（D-Sub 9 Pin） （Mini-DIN 8 Pin）

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4. Notes for Communication

4.1 The projector command is defined one command/one line that starts “C” and ends carriage
return (0x0D).

4.2 The projector starts decoding after the carriage return.

4.3 There are two types of command, functional execution commands and state read commands.

Example of Functional Execution Command: “C05” [CR]

Example of State Read Command: “CR0” [CR]

4.4 It clears information of accepting buffer as following terms.

4.4.1 When a projector receives LF（0xoA） or EOF（0x1A）

4.4.2 When it takes more than one second to receive on e command.
(Until the projector receives the carriage return after the projector receives the first
data.)

4.5 When control command pipelining, after the response, wait interval of time as below.

1.COMMAND such as ”VOLUME +/-“Æ 100ms

2.Other COMMANDÆ 500ms

4.6 Wait at least 500 ms after the response, when status read command pipelining.

4.7 Do not issue any command before the Response.
When there is no response after 5 seconds, issue next command.

4.8 It takes about 7 seconds for internal initialization after plugging in AC. During this time, it
cannot process command. Do not issue any commands.

4.9 7 seconds after StandBy 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.

4.10 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.

4.11 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.
Response for Status Read Command after accepting has different characters. See ”Status Read
Command Table”.

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4.12 Characters for commands must be Capital (A - Z).

5. Functional Execution Command Table

Command Item Command Item

C00 Power ON C2A Power Management Ready
C01

Power OFF Quick Power OFF）

C2B Power Management OFF
C02 Power OFF C2E Power Management Shut down
C05 Computer C30 D.Zoom +
C07 Video C31 D.Zoom ­C09 Volume + C32 Video Auto

C0A Volume - C33 Video Video
C0B Audio Mute ON C34 Video S-Video
C0C Audio Mute OFF C3A Pointer Right
C0D Video Mute ON C3B Pointer Left
C0E Video Mute OFF C3C Pointer Up
C0F

Screen Normal size（4:3）

C3D Pointer Down
C10

Screen Wide size（16:9）

C3F Enter
C11 Image Standard C43 Freeze ON
C12 Image High contrast C44 Freeze OFF
C13 Image Cinema C50 Computer Analog RGB
C14 Image Custom C51 Computer Scart

C1C Menu ON C54 Computer Component
C1D Menu OFF C59 Page Up
C1E Display Clear C5A Page Down

C20 Brightness + C89 Auto PC Adj.
C21 Brightness - C8A Presentation Timer
C27

Image （Toggle）

C8E Keystone Up

C8F Keystone Down

6. Status Read Command Table

Command

Function
CR0 Status Read
CR1 Input Mode Read
CR3 Lamp Time Read
CR4 Setting Read
CR6 Temp Read

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7. Functional Execution Command Table

7.1 Format

1. PC issues a command as below form at
“C” [CR]

COMMAND

Command: 2 characters (See Functional Execution Command Table)

2. A projector decodes received data and sends a return result after being ready to receive
next command.
[ACK] [CR]:（0x06,0x0D）When received functional execution commands.
“?” [CR]: When cannot read received data

7.2 When the command pipelining is needed

When some functions need command pipelining , the performance is the same as the remote
control’s performance.

1. System: issue any commands every 100ms after receiving response

2. When receiving the same command continuously with 120ms, the function is executed

for 120ms from that moment.

3. When receiving the same command continu ously, with 120ms, the fun ction is executed

for 120ms form the moment.

4. The next command is not issued after 120ms, and the execution is stopped.

5. If the projector receives other incoming commands within 120ms, the execution is

stopped.

7.3 Transfer Example

Change to Video mode with Basic Command

 Command

PC Æ Projector “C” ”0” ”7” CR

Projector Æ PC ACK CR
Processing
(A few ms--1s)

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