Table of Contents
Paragraph
Number
Title
Page
Number
QUICC Memory Map
3.1
3.2
3.3
3.3.1
3.3.2
Dual-Port RAM Memory Map .................................................................. 3-2
CPM Sub-Module Base Addresses......................................................... 3-3
Internal Registers Memory Map .............................................................. 3-4
SIM Registers Memory Map.................................................................... 3-4
CPM Registers Memory Map .................................................................. 3-6
Section 4
Bus Operation
4.1
Bus Transfer Signals............................................................................... 4-2
Bus Control Signals................................................................................. 4-3
Function Codes (FC3–FC0) .................................................................... 4-3
Address Bus (A31–A0)............................................................................ 4-4
Address Strobe (AS) ............................................................................... 4-4
Data Bus (D31-D0).................................................................................. 4-4
Data Strobe (DS)..................................................................................... 4-4
Output Enable (OE)................................................................................. 4-4
Byte Write Enable (WE0, WE1, WE2, WE3)........................................... 4-4
Bus Cycle Termination Signals ............................................................... 4-5
Data transfer and size acknowledge (DSACK1 and DSACK0)............... 4-5
Bus Error (BERR).................................................................................... 4-5
Autovector (AVEC).................................................................................. 4-6
Data Transfer Mechanism....................................................................... 4-6
Dynamic Bus Sizing ................................................................................ 4-6
Misaligned Operands ............................................................................ 4-11
Effects of Dynamic Bus Sizing and Operand Misalignment .................. 4-19
Bus Operation ....................................................................................... 4-20
Synchronous Operation with DSACKx.................................................. 4-21
Fast Termination Cycles........................................................................ 4-21
Data Transfer Cycles............................................................................. 4-22
Read Cycle............................................................................................ 4-23
Write Cycle............................................................................................ 4-26
Read-Modify-Write Cycle ...................................................................... 4-28
CPU Space Cycles................................................................................ 4-31
Breakpoint Acknowledge Cycle............................................................. 4-31
LPSTOP Broadcast Cycle..................................................................... 4-35
Module Base Address Register (MBAR) Access .................................. 4-36
Interrupt Acknowledge Bus Cycles........................................................ 4-36
Interrupt Acknowledge Cycle—Terminated Normally............................ 4-36
Autovector Interrupt Acknowledge Cycle. ............................................. 4-38
Spurious Interrupt Cycle........................................................................ 4-40
Bus Exception Control Cycles............................................................... 4-41
Bus Errors ............................................................................................. 4-42
Retry Operation..................................................................................... 4-44
Halt Operation ....................................................................................... 4-46
Double Bus Fault................................................................................... 4-48
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7
4.1.8
4.1.9
4.1.9.1
4.1.9.2
4.1.9.3
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.3
4.3.1
4.3.2
4.3.3
4.4
4.4.1
4.4.2
4.4.3
4.4.4
4.4.4.1
4.4.4.2
4.4.4.3
4.5
4.5.1
4.5.2
4.5.3
4.5.4
MOTOROLA
MC68360 USER’S MANUAL
iii
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