Harrier Power-Up Configuration
Functional Description
CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)
89
XAD
[23:20]
Jumpers
1111
XCSR.GCSR.PUST
[3:0]
Generic Power Up Status Bits
(Software readable header)
XAD[19]
Resistor
0
State of bit can be
inferred:
XCSR.CLAS
(XCSR+$308)
Set PCI Configuration register CLAS to
present class code for “bridge device”.
XAD[18]
Resistor
1
XCSR.PARB.ENA
Enable internal PCI arbiter
XAD[17]
Fixed
A=1
B=0
XCSR.XARB.ENA
Harrier A, enable internal PPC arbiter
Harrier B, disable internal PPC arbiter
XAD
[16:15]
Fixed
A=00
B=01
XCSR Register
Group Base
Address
Harrier A XCSR base addr. $FEFF0000
Harrier B XCSR base addr. $FEFF1000
XAD
[14-12]
On board
logic sets
ratio
000
XCSR.GCSR.RAT
Reserved
001
PPC-to-PCI clock ratio 3:2
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
[11:10]
Fixed
A=01
B=XX
XCSR.XPAT0.DW
Harrier A, Flash Bank A 16-bits wide
Harrier B, Flash Bank A not used.
XAD[9]
Jumper
on board
A=1
B=0
XCSR.XPAT0.RVEN
Harrier A, Flash Bank A is Reset Vector.
Harrier B has no flash.
XAD
[8:7]
Resistor
A=01
B=xx
XCSR.XPAT1.DW
Harrier A, Flash Bank B to 16-bit width
Harrier B, Flash Bank B not used.
XAD[6]
Fixed
A=1
B=0
XCSR.XPAT1.RVEN
Harrier A, Flash Bank B is Reset Vector
if and only if Bank A is not Reset Vector.
Harrier B has no flash.
XAD
[5:4]
Fixed
A=00
B=xx
XCSR.XPAT2.DW
Harrier A, Xport Ch. 2 8-bit width.
Harrier B, Xport Ch. 2 not used.
XAD[3]
Fixed
0
XCSR.XPAT2.RVEN
Disable Xport channel 2 as Reset Vector
XAD
[2:1]
Fixed
xx
XCSR.XPAT2.DW
Xport Channel 3 Data Width
Unused.
XAD[0]
Fixed
0
XCSR.XPAT3.RVEN
Disable Xport channel 3 as Reset Vector
Table 4-2 Harrier Power-Up Configuration Settings (continued)
Harrier
XAD Bus
Signal
Select
Option
Power Up
Default
Register Bit(s)
Meaning of Power-Up
Default State
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