
S3FB42F MICROCONTROLLER
xi
Table of Contents (Continued)
Chapter 25
MAC2424
Introduction.........................................................................................................................................25-1
Architecture Features ..........................................................................................................................25-2
Block Diagram ....................................................................................................................................25-3
I/O Description ....................................................................................................................................25-4
Programming Model.............................................................................................................................25-6
Multiplier and Accumulator Unit ....................................................................................................25-7
Arithmetic Unit ............................................................................................................................25-11
Status Register 1 (MSR1) ............................................................................................................25-16
Ram Pointer Unit.................................................................................................................................25-18
Address Modification ...................................................................................................................25-18
Data Memory Spaces and Organization.........................................................................................25-23
Arithmetic Unit ....................................................................................................................................25-24
A, B Accumulators ......................................................................................................................25-25
Overflow Protection in A/B Accumulators .......................................................................................25-25
Arithmetic Unit ............................................................................................................................25-26
External Condition Generation Unit................................................................................................25-27
Status Register 0 (MSR0) ............................................................................................................25-27
Status Register 2 (MSR2) ............................................................................................................25-30
Barrel Shifter and Exponent Unit ...........................................................................................................25-31
Barrel Shifter...............................................................................................................................25-32
Exponent Block...........................................................................................................................25-35
Instruction Set Map and Summary ........................................................................................................25-37
Addressing Modes.......................................................................................................................25-37
Instruction Coding........................................................................................................................25-42
Quick Reference..........................................................................................................................25-55
Quick Reference..........................................................................................................................25-56
Instruction Set.....................................................................................................................................25-60
Glossary.....................................................................................................................................25-60
Instruction Description .................................................................................................................25-61
Chapter 26
Electrical Data
Overview .............................................................................................................................................26-1
Chapter 27
Mechanical Data
Overview .............................................................................................................................................27-1