MC68HC000RC12 Datasheet, PDF (3/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor, Inc.
Paragraph
Number
4.1
4.1.1
4.1.2
4.1.3
4.2
5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.2
5.2.1
5.2.2
5.2.3
5.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.5
5.6
5.7
5.8
6.1
6.1.1
6.1.2
6.1.3
6.1.4
6.2
6.2.1
6.2.2
6.2.3
TABLE OF CONTENTS (Continued)
Title
Page
Number
Section 4
8-Bit Bus Operations
Data Transfer Operations.............................................................................4-1
Read Operations ......................................................................................4-1
Write Cycle ............................................................................................... 4-3
Read-Modify-Write Cycle..........................................................................4-5
Other Bus Operations...............................................................................4-8
Section 5
16-Bit Bus Operations
Data Transfer Operations............................................................................ 5-1
Read Operations ..................................................................................... 5-1
Write Cycle .............................................................................................. 5-4
Read-Modify-Write Cycle......................................................................... 5-7
CPU Space Cycle.................................................................................... 5-9
Bus Arbitration .......................................................................................... 5-11
Requesting The Bus .............................................................................. 5-14
Receiving The Bus Grant ...................................................................... 5-15
Acknowledgment of Mastership (3-Wire Arbitration Only)..................... 5-15
Bus Arbitration Control .............................................................................. 5-15
Bus Error and Halt Operation .................................................................... 5-23
Bus Error Operation .............................................................................. 5-24
Retrying The Bus Cycle......................................................................... 5-26
Halt Operation ....................................................................................... 5-27
Double Bus Fault ................................................................................... 5-28
Reset Operation ........................................................................................ 5-29
The Relationship of DTACK, BERR, and HALT ......................................... 5-30
Asynchronous Operation .......................................................................... 5-32
Synchronous Operation ............................................................................ 5-35
Section 6
Exception Processing
Privilege Modes............................................................................................ 6-1
Supervisor Mode ......................................................................................6-2
User Mode ................................................................................................ 6-2
Privilege Mode Changes ..........................................................................6-2
Reference Classification........................................................................... 6-3
Exception Processing................................................................................... 6-4
Exception Vectors .................................................................................... 6-4
Kinds Of Exceptions ................................................................................. 6-5
Multiple Exceptions................................................................................... 6-8
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M68000 USER’S MANUAL
MOTOROLA
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