Input/Output

 

 

 

 

DVD-V5000 DVD Player

 

 

 

 

RS-232 Command Protocol

9-pin D-Sub connector

 

 

 

 

Pin #

Terminal

Input/Output

Function

 

 

1

NC

 

 

 

 

2

TxD

Output

send data

 

 

3

RxD

Input

receive data

 

 

4

DTR

Output

enable data receiving

 

 

5

GND

--

ground

 

 

6

DSR

Input

data set ready

 

 

7

RTS

Output

request to send

 

 

8

CTS

Input

clear to send

 

 

9

NC

 

 

 

2.3Computer Control Functions

2.3.1Serial Control (see Chapters 3, 4, 5 and 6)

The player and computer are based upon the RS-232C protocol and are connected through the TxD, RxD, DTR and GND terminals.

2.3.2Extend Terminal Control (see Chapter 9)

Control the player with the Extend Terminal Switches (SW#).

Even if the Key Lock is set (active), the extend terminal control is available.

2.3.3External Power Control

Control the player’s power with the Power Pin within the Interface Connector.

If the player detects a high signal throughput (100m/sec or more) during the Standby mode, the player powers ON. If the player detects the same signal during the Power ON mode, the player powers OFF and switches to the Standby mode.

The specifications for the Power pin are as follows:

Maximum Input Voltage

Less Than 12V

High Level Signal

More Than 4.5V

Low Level Signal

Less Than 0.5V

 

 

 

 

 

 

 

more than

Standby mode

 

100 msec

 

 

 

 

Power ON

- 3

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Pioneer RS-232C manual Computer Control Functions, Input/Output

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.