Memory Data Upload, Contents, Numbers of, Bytes

DVD-V5000 DVD Player

RS-232 Command Protocol

6.35Memory Data Upload

Function	:	reads the data from internal memory in a player
Format	:	MU

Explanation : The player, while in Park mode, sends the data to the computer with the total bytes equaling 11,134bytes

*1,796bytes in data composed of Condition, Last memory (SETUP, ADV.SETUP, Error History, Program area, etc.)

*9,332 bytes data such as Command Stack data

Both sets of information can be read at the same time.

	The Communication flows as shown below.
	(N=11,134)
	Computer			DVD player
			---MU<CR>--->
			<---R<CR>----
			<--1st byte data--
			<--2nd byte data--
			~
			<--(N-1)th byte data--
			<--Nth byte data<CR>--
			<---R<CR>----
Format of the data:

	BP		Contents		Numbers of
					bytes
	0 - 1	(1)	Total number of the transfer data		2 bytes
			(fixed number = 2B7EH)
	2 - 5	(2)	00000000		4 bytes
	6 - 9	(3)	Player ID (501570XX)		4 bytes
	10 - 9,333	(4)	Command Stack Data		9,324 bytes
	9,334-9,361	(5)	All FF		28 bytes
	9,362 –	(6)	Setup data		1688 bytes
	11,049
	11050 –	(7)	ADV.SETUP setting data		16 bytes
	11065
	11,066 –	(8)	Extend Terminal user setting data		64bytes
	11,129
	11130 –	(9) check sum			4 bytes
	11133

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RS-232C specifications

The Pioneer RS-232C is a significant component in the realm of communication technology, especially known for its application in serial communications. Initially introduced in the 1960s as part of the EIA-232 standard, RS-232C has evolved through various iterations to become a foundational interface for connecting data communication equipment (DCE) with data terminal equipment (DTE). This article outlines its main features, technologies, and characteristics.

One of the hallmark features of RS-232C is its ability to facilitate point-to-point communication. It allows for a direct link between two devices, making it suitable for a variety of applications, including modems, printers, computers, and other peripherals. The RS-232C interface typically uses a 25-pin connector, although a 9-pin variant is also common in many modern devices. This interface is based on serial communications, where bits are sent sequentially over a single channel, leveraging fewer wires compared to parallel communication methods.

In terms of technology, RS-232C operates primarily at voltage levels of +12V to -12V, which provide the necessary signaling for data transmission. The standard supports baud rates ranging from 300 to 115200 bps, accommodating various data transfer speeds depending on the needs of the hardware involved. RS-232C defines various electrical characteristics and timing requirements, ensuring robust performance over relatively short distances, typically up to 15 meters, depending on the baud rate.

Another essential aspect of the RS-232C standard is its use of asynchronous communication, allowing devices to transmit data without having to synchronize their clocks. Each data packet typically consists of a start bit, a predefined number of data bits (usually 7 or 8), an optional parity bit for error-checking, and one or more stop bits. This method allows for error detection and ensures data integrity during transmission.

Despite its age, the RS-232C interface remains relevant, especially in industrial applications, instrumentation, and legacy systems. Its simplicity, low cost, and widespread acceptance make it a versatile choice for connecting various devices, even in a world increasingly dominated by USB and other modern interfaces.

In conclusion, the Pioneer RS-232C is a remarkable testament to the enduring nature of serial communication technology. Its straightforward design, reliability, and ease of integration continue to make it a staple in numerous applications, underscoring its significance in the landscape of data communication.