21285-AB Pci Configuration Space Registers - Intel Corporation

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21285-AB

Manufacturer Part Number
21285-AB
Description
Microprocessor, 21285 Core Logic For SA-110 Microprocessor
Manufacturer
Intel Corporation
Datasheet

Specifications of 21285-AB

Case
BGA
Dc
99+/00+
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Registers
7.1
21285 Core Logic for SA-110 Datasheet
Table 7-1. Register Access
This chapter describes the following categories of registers:

PCI Configuration Space Registers

PCI configuration space registers conform to the PCI Local Bus Specification, Revision 2.1. These
registers are accessed from the PCI by configuration reads and configuration writes, and are byte
writable. They are also accessible from the SA-110 (offset is from address 4200 0000h).
shows the allowable access to each register.
Abbreviation
R
R/W
W1C
W0C
W1S
WO

PCI configuration space registers

PCI control and status registers
SA-110 control and status registers
— Interrupt controller registers
— Timer control registers
— DMA control registers
— I
— Miscellaneous registers
2
O control registers
Definition
Read only. Writes have no effect.
Read/write.
Read. Write 1 to clear.
Write zero to clear.
Read. Write 1 to set.
Write only.
Table 7-1
7
7-1

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