CS5920 datasheet(39/160 Pages) AMCC

39 / 160 page

S5920 – PCI Product

Revision 1.01 – November 28, 2005

AMCC Confidential and Proprietary

DS1596

Data Book

PCI COMMAND REGISTER (PCICMD)

This 16-bit register provides basic control over a

device’s ability to respond to or perform PCI accesses.

This register is defined by the PCI specification and its

implementation is required of all PCI devices. Four of

the ten implemented bits are required by the S5920;

those which are not required are hardwired to 0. The

definitions for all the fields are provided here for

completeness.

Figure 9. PCI Command Register

PCI Command

Address Offset:

04h-05h

Power-up value:

0000h

Boot-load:

not used

Attribute:

Read/Write (R/W on 4 bits, R/O for

all others)

Size:

16 bits

Reserved = 00

Fast Back-to-Back

SERR# Enable

Wait Cycle Enable

PERR# Enable

Palette Snoop Enable

Memory Write and Invalidate Enable

Special Cycle Enable

Bus Master Enable

Memory Access Enable

I/O Access Enable

CS5920 数据表(PDF) 39 Page - Applied Micro Circuits Corporation

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