Motorola MVME2600 manual Serial Connections-Ports 1 and 2 MVME761

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Connector Pin Assignments

Table 4-15. VMEbus Connector P2 (MVME761 I/O Mode) (Continued)

18	GND	SIO∗	VD20	PR_BUSY	PMCIO17	18
19	Not Used	AFD∗	VD21	PR_PE	PMCIO18	19
20	GND	SLIN∗	VD22	PR_SLCT	PMCIO19	20
21	Not Used	TxD3	VD23	PR_INIT∗	PMCIO20	21
22	GND	RxD3	GND	PR_ERR∗	PMCIO21	22
23	Not Used	RTxC3	VD24	TxD1	PMCIO22	23
24	GND	TRxC3	VD25	RxD1	PMCIO23	24
25	Not Used	TxD3	VD26	RTS1	PMCIO24	25
26	GND	RxD3	VD27	CTS1	PMCIO25	26
27	Not Used	RTxC4	VD28	TxD2	PMCIO26	27
28	GND	TRxC4	VD29	RxD2	PMCIO27	28
29	PMCIO30	Not Used	VD30	RTS2	PMCIO28	29
30	GND	–12VF	VD31	CTS2	PMCIO29	30
31	PMCIO31	MSYNC∗	GND	MD0	GND	31
32	GND	MCLK	+5V	MD1	VPC	32

Serial Ports 1 and 2

The MVME2603/2604 provides both asynchronous (ports 1 and 2) and synchronous/asynchronous (ports 3 and 4) serial connections. For the MVME761-compatible versions of the base board, the asynchronous interface is implemented with a pair of DB9 connectors (COM1 and COM2) located on the MVME761 transition module. The pin assignments are listed in the following table.

Table 4-16. Serial Connections—Ports 1 and 2 (MVME761)

1	SPnDCD
2	SPnRxD
3	SPnTxD
4	SPnDTR
5	GND

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