Motorola MCPN750A, IH5 manual 2. Multiplexing Sequence of the MX Function

6

Functional Description

Table 6-2. Multiplexing Sequence of the MX Function

	MXDO			MXDI
(From MCPN750A)			(From TMCPN710 & TM-PIMC-0001)
TIME SLOT		SIGNAL NAME	TIME SLOT		SIGNAL NAME
0		RTS3	0		CTS3
1		DTR3	1		DSR3
2		RTS1	2		DCD3
3		RTS2	3		CTS1
4		RTS4	4		RI3
5		DTR4	5		CTS4
6		Reserved	6		DSR4
7		Reserved	7		DCD4
8		Reserved	8		CTS2
9		DTR1	9		RI4
10		DTR2	10		RI1
11		Reserved	11		DSR1
12		Reserved	12		DCD1
13		Reserved	13		RI2
14		Reserved	14		DSR2
15		Reserved	15		DCD2

The MX function is implemented using PALs and some discrete devices. MXSYNC# is clocked out using the falling edge of MXCLK, and MXDO by using the rising edge of the MXCLK. MXDI is sampled at the rising edge of MXCLK (the transition module synchronizes MXDI with MXCLK’s rising edge). The timing relationships among MXCLK, MXSYNC#, MXDO, and MXDI are illustrated by the following figure:

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