Harrier Power-Up ConfigurationFunctional Description

Table 4-2 Harrier Power-Up Configuration Settings (continued)

Harrier

 

 

 

 

XAD Bus

Select

Power Up

 

Meaning of Power-Up

Signal

Option

Default

Register Bit(s)

Default State

 

 

 

 

 

XAD

Jumpers

1111

XCSR.GCSR.PUST

Generic Power Up Status Bits

[23:20]

 

 

[3:0]

(Software readable header)

 

 

 

 

 

 

 

 

XAD[19]

Resistor

0

State of bit can be

Set PCI Configuration register CLAS to

 

 

 

inferred:

present class code for “bridge device”.

 

 

 

XCSR.CLAS

 

 

 

 

(XCSR+$308)

 

 

 

 

 

 

XAD[18]

Resistor

1

XCSR.PARB.ENA

Enable internal PCI arbiter

 

 

 

 

 

XAD[17]

Fixed

A=1

XCSR.XARB.ENA

Harrier A, enable internal PPC arbiter

 

 

B=0

 

Harrier B, disable internal PPC arbiter

 

 

 

 

 

XAD

Fixed

A=00

XCSR Register

Harrier A XCSR base addr. $FEFF0000

[16:15]

 

B=01

Group Base

Harrier B XCSR base addr. $FEFF1000

 

Address

 

 

 

 

 

 

 

 

 

XAD

On board

000

XCSR.GCSR.RAT

Reserved

[14-12]

logic sets

 

 

 

001

 

PPC-to-PCI clock ratio 3:2

ratio

 

 

 

 

 

 

 

 

 

010

 

PPC-to-PCI clock ratio 2:1

 

 

 

 

 

 

 

011

 

PPC-to-PCI clock ratio 5:2

 

 

 

 

 

 

 

100

 

PPC-to-PCI clock ratio 1:1

 

 

 

 

 

 

 

101

 

Reserved

 

 

 

 

 

 

 

110

 

PPC-to-PCI clock ratio 3:1

 

 

 

 

 

 

 

111

 

Reserved

 

 

 

 

 

XAD

Fixed

A=01

XCSR.XPAT0.DW

Harrier A, Flash Bank A 16-bits wide

[11:10]

 

B=XX

 

Harrier B, Flash Bank A not used.

 

 

 

 

 

XAD[9]

Jumper

A=1

XCSR.XPAT0.RVEN

Harrier A, Flash Bank A is Reset Vector.

 

on board

B=0

 

Harrier B has no flash.

 

 

 

 

 

 

 

 

XAD

Resistor

A=01

XCSR.XPAT1.DW

Harrier A, Flash Bank B to 16-bit width

[8:7]

 

B=xx

 

Harrier B, Flash Bank B not used.

 

 

 

 

 

XAD[6]

Fixed

A=1

XCSR.XPAT1.RVEN

Harrier A, Flash Bank B is Reset Vector

 

 

B=0

 

if and only if Bank A is not Reset Vector.

 

 

 

 

 

 

 

 

Harrier B has no flash.

 

 

 

 

 

XAD

Fixed

A=00

XCSR.XPAT2.DW

Harrier A, Xport Ch. 2 8-bit width.

[5:4]

 

B=xx

 

Harrier B, Xport Ch. 2 not used.

 

 

 

 

 

XAD[3]

Fixed

0

XCSR.XPAT2.RVEN

Disable Xport channel 2 as Reset Vector

 

 

 

 

 

XAD

Fixed

xx

XCSR.XPAT2.DW

Xport Channel 3 Data Width

[2:1]

 

 

 

Unused.

 

 

 

 

 

XAD[0]

Fixed

0

XCSR.XPAT3.RVEN

Disable Xport channel 3 as Reset Vector

 

 

 

 

 

CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)

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Motorola CPCI-6020 manual Harrier Power-Up ConfigurationFunctional Description