ViewSonic Cd4620 Users Guide

							ViewSonic CD4620  48 
Chinese 006 : Russian 
OSD timeout  8    s  3  33  005 ~120 Sec  Set OSD timeout 
Volume    8    s  5  35  000 ~ 100     
000: OFF Mute   8    s  6  36 
001: ON (mute)     
000: OFF   Off Timer  8    s  7  37 
001~024 (hour)   
000 : OFF 
001:  PIP 
002:  POP 
003 : PBP 
PIP Mode    8    s  9  39 
004 : PBPA   
000: Main PIP Sound select    8    s  :  3A 
001: PIP     
000: Up 
001: Down 
002: Left 
PIP position  8    s  ;  3B 
003: Right   
000 : VGA 
001 : HDMI1 
002 : HDMI2 
003 : AV 
004 : YPbPr 
PIP Input    8    s  <   3C 
005 : S-Video   
Monitor ID  8    s  =  3D  001 ~ 026     
000 : POWER 
001 : SOURCE 
002 : MENU/EXIT 
003 : UP 
004 : DOWN 
005 : LEFT 
006 : RIGHT 
Key Pad  8    s  A    41 
007 : MUTE   
000: Disable Disable: RCU has no 
effect on HDTV. 
001: Enable   Enabled: RCU 
controls the HDTV. 
This is the power up 
default on the HDTV. 
Remote Control   8    s  B   42 
002: Pass through Pass through: 
RCU 
has no effect on HDTV 
and all RCU command 
codes are transmitted 
to FC via the RS232 
port. See page 26 for 
more details 
000: Disable Disable: Key Pad have 
no effect on HDTV. Key Pad  8    s  C  43 
001: Enable Enabled
: Key Pad 
control the HDTV. This 
is the power up default 
on the HDTV. 
Factory reset  8    s  ~  7E  0  Rests HDTV to factory 
setting 
 
						

							ViewSonic CD4620  49 
5.3 Get-Function Listing  
The PC can interrogate the LCD Monitor for specific information. The Get-Function packet format 
consists of 5 bytes which is similar to the Set-Function packet structure. Note that the “Value” byte is 
always = 00. 
 
Get-Function description:   
Length:  Total Byte of Message excluding “CR” 
TV ID Identification for each of TV 
Command Type Identify command type,   
“g” (0x67h) : Get Command 
Command:  Function command code: One byte ASCII code   
Value[1~3]:  Three bytes ASCII that defines the value   
CR 0x0D 
 
Get-Function format   
Send: (Command Type=”g”) 
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Byte 
Count  1 Byte    2 Byte  1 Byte  1 Byte    1 Byte  1 Byte  1 Byte    1 Byte   
Bytes 
order 1 2~3  4  5  6  7  8  9 
Reply: (Command Type=”r” or “-”) 
If the Command is valid, Command Type =”r” 
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Byte 
Count  1 Byte    2 Byte  1 Byte  1 Byte    1 Byte  1 Byte  1 Byte    1 Byte   
Bytes 
order 1 2~3  4  5  6  7  8  9 
If the Command is Not valid, Command Type=”-“ 
Name  Length ID Command Type CR 
Byte 
Count  1 Byte    2 Byte  1 Byte  1 Byte 
Bytes 
order 1 2~3  4  5 
 
Example1: Get Brightness from TV-05 and this command is valid.   
The Brightness value is 67. 
Send (Hex Format)   
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Hex   0x38 0x30 0x35 0x67 0x62 0x30 0x30 0x30 0x0D 
Reply(Hex Format) 
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Hex   0x38 0x30 0x35 0x72 0x62 0x30 0x36 0x37 0x0D 
 
Example2: Get Brightness from TV-05 , but the Brightness command ID is error 
and it is NOT in the command table. 
Send (Hex Format)   
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Hex   0x38 0x30 0x35 0x67 0XD3 0x30 0x30 0x30 0x0D 
Reply (Hex Format) 
Name  Length ID Command Type CR 
Hex   0x34 0x30 0x35 0x2D 0x0D
 
 
						

							ViewSonic CD4620  50 
Example3: Get Tint from TV-0007 and this command is valid.   
The Tint value is 32. 
Send (Hex Format)   
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Hex   0x38 0x30 0x37 0x67 0X65 0x30 0x30 0x30 0x0D 
Reply (Hex Format) 
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Hex   0x38 0x30 0x37 0x72 0x65 0x30 0x33 0x32 0x0D 
 
Example4: Get Tint from TV-07 , but the Brightness command ID is error and it is NOT in the 
command table. 
Send (Hex Format)   
Name  Length  ID  Command Type Command Value1  Value2  Value3   CR  
Hex   0x38 0x30 0x37 0x67 0XD7 0x30 0x30 0x30 0x0D 
Reply (Hex Format) 
Name  Length ID Command Type CR 
Hex   0x34 0x30 0x37 0x2D 0x0D
 
  PC Get-function command to CD4620/CD4220 LCD Monitor   
Length ID Command 
Typ e  Command   Response Range  Get Function   
      Code (ASCII) Code (Hex)(Three ASCII  bytes) Comments 
Get-Contrast    8    g  a  61  000 ~ 100    Gets Contrast value 
Get-Brightness    8    g  b  62  000 ~ 100    Gets Brightness value 
Get-Sharpness    8    g  c  63  000 ~ 100    Gets Sharpness value 
Get-Color    8    g  d  64  000 ~ 100    Gets Color value 
Get-Tint    8    g  e  65  000 ~ 100  Gets Tint value 
Get-Volume    8    g  f  66  000 ~ 100    Gets Volume value 
000: OFF (unmuted) Get-Mute   8    g  g  67 
001: ON (muted) Gets Mute ON/OFF status
000: Disable 
001: Enable   
Get-RCU 8  g h 68 
002: Pass through Gets RCU mode status 
000: Disable Get-Key Pad  8    g  i  69 
001: Enable Gets Buttons ON/OFF 
status 
000: VGA 
001: HDMI1 
002: HDMI2 
003: AV 
004: YPbPr 
Get-Input select  8    g  j  6A   
005: S-Video Gets Input select status 
000: STBY  Gets the status of the HDTV 
power.  
001: ON  HDTV response: 
   000 = HDTV is in standby 
Get-Power status  8    g  l  6C 
   001 = HDTV is ON 
Get-ACK  8    g  z  7A  0  This command is used to 
test the communication link.
 
						

							ViewSonic CD4620  51  6. 
Protocol 2 : without ID 
6.1 Set function listing 
The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to 
control the LCD monitor behavior in a remote sit through the RS232 port. The Set-Function packet 
format consists of 5 bytes. Note that the “Value” byte is always = 00. 
 
 
Set-Function description:   
Length:  Total bytes of message = 5 ASCII (35H) excluding “CR” 
Command:  Function command code: One byte ASCII code   
Value[1~3]:  Three bytes ASCII that defines the value   
 
Set-Function format: 
Name  
Length   Command
Value1 Value2 Value3 CR 
Byte Count    1 Byte    1 Byte    1 Byte  1 Byte  1 Byte  1 Byte 
Bytes order  1  2  3  4  5  6 
 
 
All Set-Function from PC to Monitor (ASCII) 
Name  
Length   Command
Value1 Value2 Value3 CR 
Byte Count   5    1 Byte    1 Byte  1 Byte  1 Byte 00D
Bytes order  1  2  3  4  5  6 
 
Example: Set Mute-ON command (ASCII) 
Name  
Length   Command
Value1 Value2 Value3 CR 
Byte Count   5   6   0   0  0 00D
Bytes order  1  2  3  4  5  6 
 
Example: Set Mute-OFF command (ASCII) 
Name  
Length   Command
Value1 Value2 Value3 CR 
Byte Count   5   6   0  0  1 00D
Bytes order  1  2  3  4  5  6 
 
Example: Set Tint to 50 command (ASCII) 
Name  
Length   Command
Value1 Value2 Value3 CR 
Byte Count   5   ‘  0 5 0 00D
Bytes order  1  2  3  4  5  6 
 
LCD Monitor will send “+” (02Bh) and “CR” bytes to PC after receiving a valid command. 
LCD Monitor will send “-” (02Dh) and “CR” bytes to PC if the command is not valid. 
 
Value Range:    Three bytes ASCII value range   
Command Code:    Function command code in ASCII
 
CD4620/CD4220 set command table 
Length Command   Command Value Range  Set Function   
  Code (ASCII)    Code (Hex)(Three ASCII  bytes) Comments 
000: STBY Power   5  !  21 
001: ON Controlled    power status: ON or 
Standby 
000 : VGA 
001 : HDMI1 
002 : HDMI2 
003 : AV 
004 : YPbPr 
Input Select    5  “  22 
005 : S-Video   
Contrast   5  #   23  000 ~ 100    
 
						

							ViewSonic CD4620  52 
Brightness    5  $  24  000 ~ 100     
Sharpness   5  %   25  000 ~ 100    
Color    5  &  26  000 ~ 100     
Tint    5  ‘  27  000 ~ 100     
Bass  5  .  2E  000 ~ 100  Sets Bass value 
Treble  5  /  2F  000 ~ 100  Sets Treble value 
Balance  5  0  30  000 ~ 100  Sets Balance position 
000 : 16:9 
001 : 4:3 
002 : ZOOM 
Picture Size    5  1  31 
003 : PANORAMA   
000 : English 001 : French 002 : Spanish 003 : Germany 004 : Italian 005 : Simplified Chinese 
OSD Language    55  2  32 
006 : Russian   
OSD timeout  5  3  33  005 ~120 Sec  Set OSD timeout 
Volume    5  5  35  000 ~ 100     
000: OFF Mute   5  6  36 
001: ON (mute)     
000: OFF   Off Timer  5  7  37 
001~024 (hour)   
000 : OFF 
001:  PIP 
002:  POP 
003 : PBP 
PIP Mode    5  9  39 
004 : PBPA   
000: Main PIP Sound select    5  :  3A 
001: PIP     
000: Up 
001: Down 
002: Left 
PIP position  5  ;  3B 
003: Right   
000 : VGA 
001 : HDMI1 
002 : HDMI2 
003 : AV 
004 : YPbPr 
PIP Input    5  <   3C 
005 : S-Video   
Monitor ID  5  =  3D  001 ~ 026     
Number  5 @ 40  000 ~ 009    
000 : POWER 
001 : SOURCE 
002 : MENU/EXIT 
003 : UP 
004 : DOWN 
005 : LEFT 
006 : RIGHT 
Key Pad  5  A    41 
007 : MUTE   
000: Disable Disable: RCU has no effect on 
HDTV. 
001: Enable   Enabled: RCU controls the 
HDTV. This is the power up 
default on the HDTV. 
Remote Control   5  B   42 
002: Pass through Pass through: 
RCU has no 
effect on HDTV and all RCU 
command codes are transmitted 
to FC via the RS232 port. See 
page 26 for more details 
000: Disable Disable: Key Pad have no effect 
on HDTV. Key Pad  5  C  43 
001: Enable Enabled
: Key Pad control the 
HDTV. This is the power up 
default on the HDTV. 
Factory reset  5  ~  7E  0  Rests HDTV to factory setting 
 
						

							ViewSonic CD4620  53 
6.2 Get-Function Listing  
The PC can interrogate the LCD Monitor for specific information. The Get-Function packet format 
consists of 5 bytes which is similar to the Set-Function packet structure. Note that the “Value” byte is 
always = 00. 
 
Get-Function description:  
Length:  Total bytes of message = 5 ASCII (35H), excluding “CR” 
Command:  Get-Function command code: One byte ASCII code   
Value[1~3]: Always = 000 
 
Get-Function format from PC to LCD (ASCII) 
Name  
Length   Command
Value1 Value2 Value3  CR 
Byte Count   5   1 Byte  0   0  0 00D
Bytes order  1  2  3  4  5  6 
 
Monitor shall response to Get-Function with the following packet format: 
 
LCD Monitor response packet format: 
Name  
Length   Value1  Value2 Value3 Value4 CR 
Byte Count   5    1 Byte  1 Byte 1 Byte 1 Byte 00D
Bytes order 1  2 3 4 5 6 
 
Response packet (to Get-Function):  
Length:  Total bytes of packet = 5 ASCII excluding “CR” 
Exception: Total bytes for On-Hours = 6 
Value[1-4]:  Four ASCII codes: Value range is from 0000 ~ 9999 
Exception: Value[1-5] for On-Hours 
 
LCD Monitor will send “+” (02Bh), “CR” bytes to PC after receiving a valid command 
LCD Monitor will send “-” (02Dh), “CR” bytes to PC if the command is not valid 
 
ƒ The following is an example of PC requesting the volume value from the LCD Monitor: 
  
PC send Get-Volume-value packet to Monitor (In ASCII) 
Name  
Length   Command
Value1 Value2 Value3 CR 
Byte Count   5   f   0   0   0  00D
Bytes order  1  2  3  4  5  6 
 
LCD Monitor will send “-” (02Dh), “CR” to PC if command is not recognized. 
Otherwise the LCD Monitor will respond with the volume value as outlined below: 
 
LCD-Monitor response packet to Get-volume-value (in this example the volume value is 50):   
Name  
Length   Value1  Value2 Value3
Value4 CR 
Byte Count   5   0   0   5   0 00D
Bytes order 1  2 3 4 5 6 
 
A special command “Get-ACK” is used to test the communication link between PC and the LCD Monitor. 
The LCD Monitor shall response to “Get-ACK” command with a “+” or “-“. 
 
Get-ACK from PC to LCD (ASCII) 
Name  
Length   Command
Value1 Value2 Value3 CR 
Byte Count   5   z   0   0  0 00D
Bytes order  1  2  3  4  5  6 
 
 
LCD Monitor will send “+” (02Bh); “CR” bytes to PC after receiving the command indicating that the 
communication link is OK   
 
						

							ViewSonic CD4620  54 
 
Length Command Command Response Range 
Get Function   
   Code 
(ASCII) Code (Hex)(Three ASCII  bytes)Comments 
Get-Contrast      a  61  000 ~ 100    Gets Contrast value 
Get-Brightness      b  62  000 ~ 100    Gets Brightness value
Get-Sharpness      c  63  000 ~ 100    Gets Sharpness value
Get-Color      d  64  000 ~ 100    Gets Color value 
Get-Tint      e  65  000 ~ 100  Gets Tint value 
Get-Volume      f  66  000 ~ 100    Gets Volume value 
000: OFF (unmuted)Get-Mute     g  67 
001: ON (muted) Gets Mute ON/OFF 
status 
000: Disable 
001: Enable   
Get-RCU  h 68 
002: Pass through Gets RCU mode 
status 
000: Disable Get-Key Pad    i  69 
001: Enable Gets Buttons ON/OFF 
status 
000: VGA 
001: HDMI1 
002: HDMI2 
003: AV 
004: YPbPr 
Get-Input select    j  6A   
005: S-Video Gets Input select 
status 
000: STBY  Gets the status of the 
HDTV power.   
001: ON  HDTV response: 
   000 = HDTV is in 
standby 
Get-Power status    l  6C 
   001 = HDTV is ON 
Get-ACK    z  7A  0  This command is used 
to test the 
communication link. 
 
						

							ViewSonic CD4620  55 
6.3  Remote Control Pass-through mode 
When PC sets the LCD monitor to Remote Control Pass through mode, the LCD shall send a three 
bytes packet (followed by “CR”) in response to RCU button activation. Note, that in this mode the RCU 
shall have no effect on the monitor function. For example: “+Volume” will not change the volume in the 
LCD but only sends “+Volume” code to PC over the RS232 port. 
 
Remote Control pass-through packet format from LCD monitor to PC(ASCII) 
Name  
Length   RCU-Code1 RCU-Code2  CR  
Byte Count   3 MSB  LSB 00D 
Bytes order  1  2  3  4 
  
 
Example: Remote Control pass-through when “Menu” key is pressed (1A) 
Name  
Length   RCU-Code1 RCU-Code2  CR  
Byte Count   3 1  A 00D 
Bytes order  1  2  3  4 
 
Example: Remote Control pass-through when key “1” is pressed (01) 
Name  
Length   RCU-Code1 RCU-Code2  CR  
Byte Count   3 0  1 00D 
Bytes order  1  2  3  4 
 
Example: Remote Control pass-through when “OK” key is pressed (1F) 
Name  
Length   RCU-Code1 RCU-Code2  CR  
Byte Count   3 1  F 00D 
Bytes order  1  2  3  4 
 
Key Code (HEX) 
Size 0F 
Vo l u m e  U p  (+) 10 
Volume Down (-) 11 
Mute 12 
POWER 15 
INPUT 16 
PIP ON/OFF  17 
MENU 1A 
Up 1B 
Down    1C 
Left(-) 1D 
Right(+) 1E 
SET 1F 
PIP INPUT  00 
PIP CHANGE  00 
PICTURE MODE  00 
AUDIO INPUT  00 
SCREEN SAVER GAMMA  00 
SCREEN SAVER BRIGHTNESS  00 
DISPLAY 00 
AUTO SETUP  00 
EXIT 00