Pioneer RS-232C manual Timing

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PIONEER DVD-V7200 Industrial DVD Player RS-232 Command Protocol Manual

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> Þ 02<CR> 10260<CR>

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

Example:

ST?F<CR>

Þ

23005<CR> (completion omitted)

Example:

?FST<CR>

Þ

23005<CR>R<CR> (not omitted)

4.7Timing

The time it takes to receive a command and return a Status Value is defined as follows:

T1 represents the time from when the termination of the command string <CR> is received to the beginning of the execution of the command extension. The maximum is approximately 24ms.

T2 represents the time it takes to execute the command. Depending upon the command type and the player’s condition, the minimum is 14ms.

RxD

P

L

<CR>

T1

T2

TxD

R

<CR>

- 14 -

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Contents DVD-V7200 Page FCC Information Page Table of Contents Track CD, VCD Current Player Condition Request DescriptionsOperating Modes DVD-V7200 Internal Registers TimeIntroduction Interface Interface ConnectorSerial Interface Pin Specification Computer Control FunctionsExternal Switch Control see Chapter Serial Control Serial Interface SpecificationsCommunication with a Computer Command and Status Command StructurePage OFF Error MessagesInitial Setting CCRPage Command Structure DVD-V7200 supports the commands listed belowRegister B Set Squelch Command Mnemonic ArgumentPage Status Returns Command StringError Message Request Status ReturnTiming Close Command DescriptionsOpen RejectStart PlayDVD PauseVCD Still DVD, VCD Step Forward DVD, VCD Step Reverse DVDScan Forward Scan Reverse Scan Stop Multi-Speed Forward DVD, VCD Multi-Speed Reverse DVD Speed DVD, VCD VCD DVDSearch Search & Play Stop Marker Lead-Out Symbol Clear Frame DVDTime except disc which time code is not recorded Block Number CD, VCDChapter DVD Index CD, VCD Title DVDTrack CD, VCD Select Audio DVD Select Subtitle DVDSelect Aspect Select Parental-Level DVD Select Angle DVDAudio Control Video Control Display ControlKey Lock Barcode /Command Stack Play DVD Stack Group Set DVDVideo Blackboard Display DVD Video Blackboard ClearBlackboard / Stack Data Upload Page Command Descriptions Repeat SRP #n Barcode #n Search Pointer Gray Blackboard / Stack Data Download Weekly Timer Data Upload BCD Page Data Weekly Timer Data Download Text File Data Upload EOFPage Title/Track Number Request Current Player Condition Request DescriptionsBlock Number Request CD/VCDChapter Number Request DVD Time Code RequestIndex Number Request CD, VCD Frame Number Request DVDTotal Frame Request DVD Block Number Request CD, VCDTOC Information Request CD/VCD Disc Region Code Request DVD Disc Status RequestCD Disc Status Request LD Disc Status Request LB-compatible DVDCAV/CVL = CAV Register a Set DVDPage Register B Set Register D Set Print CharacterReal Time Clock Set Clear ScreenÂ Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Tray Lock OFF Advanced Feature Menu SetBaud Rate Blackboard Lock OFFCommunication Control Set Player Active Mode Request Player Model Name RequestAdvanced Feature Menu Request Real Time Clock RequestPlayer Region Code Request CCR Mode RequestError Code Request Input Number RequestInput Unit Request Input Barcode Data RequestRegister B Request Register a RequestCD, VCD Register D Request Menu Call DVDNumeric Button DVD Enter Button DVD Get Information DVD Ttdom HlbtnnPage Operating Modes SetupRandom Access ParkReject DVD-V7200 Internal Registers Serial Use Address Flag Remote Control Data RegisterLaser Barcode Buffer Search Time/FrameMark Index RegistersRegister Model DVD-V7200 Internal Registers External Switch Control Function AssignmentController Diode Assignment ListSimple Circuit Diode Matrix Circuit Additional Notes Appendix a Complete Command List by Name Command Supporting Formats Appendix B Complete Command List by Mnemonic Command Supporting Formats Appendix C DVD Command List CommandCommand Appendix D LB Compatible DVD Command List Command Appendix E CD Command List DVD-V7200 supports the following commandsCommand Appendix F VCD Command List Command Appendix G Error Codes Page Pioneer Electronic Corporation
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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.
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