Motorola MVME2600 manual EIA-530 Connections, Table B-4. MVME761 EIA-530 Interconnect Signals

B

Serial Interconnections

EIA-530 Connections

The EIA-530 interface complements the EIA-232-D interface in function. The EIA-530 standard defines the mechanical aspects of this interface, which is used for transmission of serial binary data, both synchronous and asynchronous. It is adaptable to balanced (double-ended) as well as unbalanced (single-ended) signaling and offers the possibility of higher data rates than EIA-232-D with the same DB-25 connector.

Table B-4lists the EIA-530 interconnections that are available at MVME761 serial ports 3 and 4 (J7 and J8 on the board surface) when those ports are configured via serial interface modules as EIA-530 DCE or DTE ports.

Table B-4. MVME761 EIA-530 Interconnect Signals

Pin	Signal	Signal Name and Description
Number	Mnemonic
1		Not used.
2	TxD_A	Transmit Data (A). Data to be transmitted; output from DTE to DCE.
3	RxD_A	Receive Data (A). Data which is demodulated from the receive line; input
		from DCE to DTE.
4	RTS_A	Request to Send (A). Output from DTE to DCE when required to transmit a
		message.
5	CTS_A	Clear to Send (A). Input to DTE from DCE to indicate that message
		transmission can begin.
6	DSR_A	Data Set Ready (A). Input to DTE from DCE to indicate that the DCE is
		ready to send or receive data. In DCE configuration, always true.
7	SG	Signal Ground. Common return line for all signals.
8	DCD_A	Data Carrier Detect (A). Receive line signal detector output from DCE to
		DTE to indicate that valid data is being transferred to the DTE on the RxD
		line.
9	RxC_B	Receive Signal Element Timing—DCE (B).	Control signal that clocks input
		data.
10	DCD_B	Data Carrier Detect (B). Receive line signal detector output from DCE to
		DTE to indicate that valid data is being transferred to the DTE on the RxD
		line.
11	TxCO_B	Transmit Signal Element Timing—DTE (B).	Control signal that clocks
		output data.

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