Motorola MC68306 User Manual page 6

TABLE OF CONTENTS (Continued)
Paragraph
Number
3.2 Bus Arbitration ........................................................................................................ 3-12
3.2.1 Requesting the Bus ............................................................................................. 3-15
3.2.2 Receiving the Bus Grant ...................................................................................... 3-16
3.2.3 Acknowledgment of Mastership (3-Wire Bus Arbitration Only) ............................ 3-16
3.3 Bus Arbitration Control ............................................................................................ 3-16
3.4 Bus Error and Halt Operation ................................................................................. 3-24
3.4.1 Bus Error Operation ............................................................................................. 3-24
3.4.2 Retrying the Bus Cycle ........................................................................................ 3-25
3.4.3 Halt Operation...................................................................................................... 3-26
3.4.4 Double Bus Fault ................................................................................................. 3-27
3.5 Reset Operation...................................................................................................... 3-28
3.6 The Relationship of DTACK, BERR , and HALT ...................................................... 3-28
3.7 Asynchronous Operation ........................................................................................ 3-30
3.8 Synchronous Operation .......................................................................................... 3-33
4.1 Features.................................................................................................................. 4-1
4.2 Processing States ................................................................................................... 4-1
4.3 Programming Model ............................................................................................... 4-2
4.3.1 Data Format Summary......................................................................................... 4-3
4.3.2 Addressing Capabilities Summary ....................................................................... 4-4
4.3.3 Notation Conventions .......................................................................................... 4-5
4.4 EC000 Core Instruction Set Overview .................................................................... 4-7
4.5 Exception Processing ............................................................................................. 4-12
4.5.1 Exception Vectors ................................................................................................ 4-14
4.6 Processing of Specific Exceptions .......................................................................... 4-16
4.6.1 Reset Exception................................................................................................... 4-17
4.6.2 Interrupt Exceptions ............................................................................................. 4-17
4.6.3 Uninitialized Interrupt Exception .......................................................................... 4-18
4.6.4 Spurious Interrupt Exception................................................................................ 4-18
4.6.5 Instruction Traps .................................................................................................. 4-18
4.6.6 Illegal and Unimplemented Instructions ............................................................... 4-18
4.6.7 Privilege Violations............................................................................................... 4-19
4.6.8 Tracing ................................................................................................................. 4-19
4.6.9 Bus Error .............................................................................................................. 4-20
4.6.10 Address Error ..................................................................................................... 4-21
4.6.11 Multiple Exceptions ............................................................................................ 4-21
MOTOROLA
Title
Section 4
EC000 Core Processor
MC68306 USER'S MANUAL
Page
Number
vii