Pioneer RS-232C manual RxD P TxD, Execution, Timing

DVD-V5000 DVD Player

RS-232 Command Protocol

If multiple commands are sent within the same String, the player returns a separate status value upon completion of each command. A status value is a character string with a <CR> termination code.

Example: ?C?F<CR> ⇒ 02<CR> 10260<CR>

When the command is at the end of the command string, the R within the completion message is omitted.

Example:	ST?F<CR>	⇒	23005<CR> (completion omitted)
Example:	?FST<CR>	⇒	23005<CR>R<CR> (not omitted)

4.7Timing

A player needs a brief period after receiving a command before returning a Status Value or “R <CR>”. It is defined as follows:

T1 represents the time between the termination of the command string <CR> received and the beginning of the command execution. It is approximately 35ms maximum.

T2 represents the time for executing the command, depending upon the command type and the player’s condition. In case of a status request command such as “?F”, T2 requires less than 1ms.

T3 represents the time that is needed for transferring data (TxD) per byte. It requires a maximum of 6ms per byte. In case of the return data for “?F” request, a player is supposed to be back 8 bytes data, that is composed of 7 digit Frame number and “<CR>”. In this case the transfer time of each byte is not exactly the same with 6ms, it takes usually around 10ms for transferring 8 bytes data total, and it takes less than 20ms.

Example:

RxD

P

TxD

L

<CR>

T1

T2

Execution

R

<CR>

T3

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