Revision 5.03 – June 14, 2006
S5320 – PCI Match Maker: Operation Registers
Data Sheet
PCI Pass-Thru Configuration Register (PTCR)
This register controls the configuration for Pass-Thru
Regions 1-4:
Pass-Thru Configuration Register
Register Name:
PCI Address Offset:
Power-up value:
PCI Attribute:
Size:
Byte 0 Controls Pass-Thru Region 1
Byte 1 Controls Pass-Thru Region 2
Byte 2 Controls Pass-Thru Region 3
Byte 3 Controls Pass-Thru Region 4
60h
80808080h
Read/Write
32 bits
IMPORTANT NOTE: This register (PTCR) is physi-
cally the same as the Add-On Pass-Thru
Configuration Register (APTCR). It is intended that
either the PCI system or local Add-On interface will
write to this register, but not both. However, in the
event that both the PCI and Add-On must write to this
register, whichever side wrote last will update its value.
Also, Pass-Thru operation cannot be guaranteed if this
register is updated while a Pass-Thru operation is
already in progress.
Figure 30. Pass-Thru Configuration Register
31
24 23
16 15
8 7
0
Region 4
Region 3
Region 2
Region 1
Active Mode Wait States
D2 D1 D0
D7 Pass-Thru Mode
0 - PTADR# Not Driven
1 - PTADR# Driven
000 - 0 Wait States
001 - 1 Wait States
010 - 2 Wait States
011 - 3 Wait States
100 - 4 Wait States
101 - 5 Wait States
110 - 6 Wait States
111 - 7 Wait States
D6 Endian Conversion
0 - No Conversion
1 - Big Endian Conversion
D5 Write FIFO
0 - Enabled
1 - Disabled
Prefetch
D4 D3
00 - Disabled
01 - Small
10 - Medium
11 - Large
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DS1656
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AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
