Motorola ColdFire MCF5281 User Manual page 6

Paragraph
Number
2.3 Programming Model ........................................................................................... 2-8
2.4 Additions to the Instruction Set Architecture ..................................................... 2-9
2.5 Exception Processing Overview ....................................................................... 2-10
2.6 Exception Stack Frame Definition.................................................................... 2-12
2.7 Processor Exceptions ........................................................................................ 2-13
2.7.1 Access Error Exception ................................................................................ 2-13
2.7.2 Address Error Exception............................................................................... 2-14
2.7.3 Illegal Instruction Exception......................................................................... 2-14
2.7.4 Divide-By-Zero............................................................................................. 2-14
2.7.5 Privilege Violation........................................................................................ 2-14
2.7.6 Trace Exception ............................................................................................ 2-14
2.7.7 Unimplemented Line-A Opcode................................................................... 2-15
2.7.8 Unimplemented Line-F Opcode ................................................................... 2-15
2.7.9 Debug Interrupt............................................................................................. 2-15
2.7.10 RTE and Format Error Exception................................................................. 2-16
2.7.11 TRAP Instruction Exception......................................................................... 2-16
2.7.12 Interrupt Exception ....................................................................................... 2-16
2.7.13 Fault-on-Fault Halt ....................................................................................... 2-16
2.7.14 Reset Exception ............................................................................................ 2-16
2.8 Instruction Execution Timing ........................................................................... 2-21
2.8.1 Timing Assumptions..................................................................................... 2-21
2.8.2 MOVE Instruction Execution Times ............................................................ 2-22
2.9 Standard One Operand Instruction Execution Times ....................................... 2-24
2.10 Standard Two Operand Instruction Execution Times....................................... 2-24
2.11 Miscellaneous Instruction Execution Times..................................................... 2-26
2.12 EMAC Instruction Execution Times ................................................................ 2-27
2.13 Branch Instruction Execution Times ................................................................ 2-28
2.14 ColdFire Instruction Set Architecture Enhancements ...................................... 2-28
3.1 Multiply-Accumulate Unit.................................................................................. 3-1
3.2 Introduction to the MAC..................................................................................... 3-2
3.3 General Operation............................................................................................... 3-3
3.4 Memory Map/Register Set.................................................................................. 3-6
3.4.1 MAC Status Register (MACSR) .................................................................... 3-6
3.4.2 Mask Register (MASK) ................................................................................ 3-11
3.5 EMAC Instruction Set Summary ...................................................................... 3-12
3.5.1 EMAC Instruction Execution Times ............................................................ 3-12
3.5.2 Data Representation...................................................................................... 3-13
3.5.3 MAC Opcodes .............................................................................................. 3-14
vi
CONTENTS
Chapter 3
Enhanced Multiply-Accumulate Unit (EMAC)
MCF5282 User's Manual
Title
Page
Number
MOTOROLA