Motorola manual Header Number Description ConÞguration, MVME177 Header Notes

2

Hardware Preparation and Installation

Table 2-2. Configuring MVME177 Headers (Continued)

Header	Header
Number	Description	ConÞguration	Jumpers				Notes
		Receive RTXC4	2 -- 3
			(Factory	1	2	3
J9
			conÞguration)				7
		Drive RTXC4	1 -- 2
	Serial Port 4			1	2	3
	clock
	conÞguration
	select headers	Receive TRXC4	2 -- 3
			(Factory	1	2	3
J10
			conÞguration)				7
		Drive TRXC4	1 -- 2
				1	2	3

MVME177 Header Notes:

1.The general purpose readable jumpers on header J1 can be read as I/O control register 3 (at $FFF40088, bits 0-7) in the VMEchip2 LCSR (see Chapter 4, VMEchip2). The bit values are read as a 1 when the jumper is off, and as a 0 when the jumper is on.

2.On the MVME177, pins 7 and 8 (bit 3) are removed for board ID and the bit value is reserved.

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