Motorola PRPMC800A/IH5 manual Xcsr.Gcsr.Pust, Xad, M66EN, XCSR.XPAT0.DW

3 Functional Description

Table 3-2. Harrier Power-Up Configuration Settings (continued)

Harrier	Select	Default	Function/	Description
XAD	Option	Power-	Register Bit
Bus		Up
Signal		Setting
XAD[23]	Jumper J2	1	Generic power up	Software readable header bit
	pins 7-8		status bit 3	3
			XCSR.GCSR.PUST
			3
XAD[22]	Jumper J2	1	Generic power up	Software readable header bit
	pins 5-6		status bit 2	2
			XCSR.GCSR.PUST
			2
XAD[21]	Jumper J2	1	Generic power up	Software readable header bit
	pins 3-4		status bit 1	1
			XCSR.GCSR.PUST
			1
XAD[20]	Jumper J2	1	Generic power up	Software readable header bit
	pins 1-2		status bit 0	0
			XCSR.GCSR.PUST
			0
XAD[19]	Jumper J2	0	I2O IOP agent	Set PCI Configuration register
	pins 13-14			CLAS to present class code
				for “bridge device” (0) or “I2O
				Controller” (1)
XAD[18]	Fixed	0	Internal PCI arbiter	Disable internal PCI arbiter
XAD[17]	Fixed	1	Internal processor	Enable internal Processor
			arbiter	arbiter
XAD	Fixed	00	XCSR register group	Set XCSR register group
[16:15]			base address	base address to $FEFF0000
		000	reserved
	On board	001	3:2	Set PPC-to-PCI clock ratio to
				3:2
	logic sets
		010	2:1	Set PPC-to-PCI clock ratio to
	ratio
	depending			2:1
	on state of
		011	5:2	Set PPC-to-PCI clock ratio to
	M66EN
XAD				5:2
[14-12]
		100	1:1	Set PPC-to-PCI clock ratio to
				1:1
		101	reserved
		110	3:1	Set PPC-to-PCI clock ratio to
				3:1
		111	reserved
XAD	Fixed	01	Xport channel 0 data	Set flash bank A to 16-bit
[11:10]			width	width
			XCSR.XPAT0.DW

18PrPMC800/800ET Processor PMC Module Installation and Use (PrPMC800A/IH5)