21285-AB

Manufacturer Part Number21285-AB
DescriptionMicroprocessor, 21285 Core Logic For SA-110 Microprocessor
ManufacturerIntel Corporation
21285-AB datasheet
 


Specifications of 21285-AB

CaseBGADc99+/00+
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Page 91/159:

PCI Configuration Space Registers

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Registers
This chapter describes the following categories of registers:

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
O control registers
2
— Miscellaneous registers
7.1

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.
Table 7-1. Register Access
Abbreviation
R
R/W
W1C
W0C
W1S
WO
21285 Core Logic for SA-110 Datasheet
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.
7
Table 7-1
7-1