DRAM Attributes Register

3-33

DRAM Base Register

3-35

CLK Frequency Register

3-35

ECC Control Register

3-36

Error Logger Register

3-39

Error Address Register

3-42

Scrub/Refresh Register

3-43

Refresh/Scrub Address Register

3-44

ROM A Base/Size Register

3-45

ROM B Base/Size Register

3-48

DRAM Tester Control Registers

3-50

32-Bit Counter

3-50

Test SRAM

3-50

Power-Up Reset Status Register 1

3-51

Power-Up Reset Status Register 2

3-51

External Register Set

3-52

Software Considerations

3-53

Parity Checking on the PowerPC Bus

3-53

Programming ROM/Flash Devices

3-53

Writing to the Control Registers

3-53

Sizing DRAM

3-54

ECC Codes

3-57

Data Paths

3-60

CHAPTER 4 Universe (VMEbus to PCI) Chip

 

Introduction

4-1

Features

4-1

Block Diagram

4-3

Functional Description

4-3

VMEbus Interface

4-4

Universe as VMEbus Slave

4-4

Universe as VMEbus Master

4-5

PCI Bus Interface

4-5

Universe as PCI Slave

4-6

Universe as PCI Master

4-6

Interrupter

4-6

VMEbus Interrupt Handling

4-7

DMA Controller

4-7

Universe Control and Status Registers (UCSR)

4-8

Universe Register Map

4-9

xii

Page 12
Image 12
Motorola MVME2300 Series manual Universe VMEbus to PCI Chip