CS5320 datasheet(77/160 Pages) AMCC

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S5320 – PCI Match Maker: Operation Registers

Revision 5.03 – June 14, 2006

AMCC Confidential and Proprietary

DS1656

Data Sheet

Add-On Pass-thru Configuration Register (APTCR)

This register controls the configuration for Pass-Thru

Regions 1-4.

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

IMPORTANT NOTE:

This register (APTCR) is physi-

cally the same as the PCI Pass-Thru configuration

tem or local Add-On interface will write to this register,

but not both. However, in the event that both the PCI

and Add-On write to this register, whichever side wrote

last wins. This register is also intended to be initialized

once, prior to any PCI bus operations. Pass-Thru

operation cannot be guaranteed if this register is

updated while a Pass-Thru transaction is being

performed.

Figure 34. Pass-Thru Configuration Register

Pass-Thru Configuration Register

Add-On Address:

60h

Power-up value:

80808080h

Add-On Attribute:

Read/Write

Size:

32 bits

Region 4

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

Active Mode Wait States

D2 D1 D0

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

Region 3

Region 2

D7 Pass-Thru Mode

0 - PTADR# Not Driven

1 - PTADR# Driven

Region 1

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