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elopment
MITSUBISHI MICROCOMPUTERS
M30222 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Specifications in this manual are tentative and subject to change
Rev. H
Description
Table of Contents
Description ................................................................................................................................................ 1-2
Features .................................................................................................................................................. 1-2
Applications ............................................................................................................................................. 1-2
Pin Configuration ..................................................................................................................................... 1-5
Memory Expansion .................................................................................................................................. 1-6
Block Diagram ......................................................................................................................................... 1-6
Performance Outline ............................................................................................................................... 1-7
M16C Family Group ................................................................................................................................ 1-8
Pin Description ........................................................................................................................................ 1-9
Operation of Functional Blocks ............................................................................................................. 1-11
Memory .................................................................................................................................................. 1-11
Central Processing Unit (CPU) .............................................................................................................. 1-12
Reset ....................................................................................................................................................... 1-15
Special Function Registers .................................................................................................................... 1-16
Software Reset ........................................................................................................................................ 1-21
Clock Generating Circuit ....................................................................................................................... 1-22
Clock Output ........................................................................................................................................... 1-26
Wait Mode ............................................................................................................................................... 1-27
Usage Precautions ................................................................................................................................ 1-27
Stop Mode ............................................................................................................................................... 1-28
Usage Precautions ................................................................................................................................ 1-28
Status Transition Of BCLK ..................................................................................................................... 1-29
Voltage Down Converter ........................................................................................................................ 1-31
Power control ......................................................................................................................................... 1-33
Modes ................................................................................................................................................... 1-33
Protection ................................................................................................................................................ 1-35
Software wait .......................................................................................................................................... 1-36
Overview of Interrupts ........................................................................................................................... 1-37
Types of Interrupts ................................................................................................................................. 1-37
Interrupts and Interrupt Vector Tables .................................................................................................... 1-39
Interrupt Control .................................................................................................................................... 1-41
Interrupt Sequence ................................................................................................................................ 1-44
Returning from an Interrupt Routine ...................................................................................................... 1-48
Interrupt Priority ..................................................................................................................................... 1-48
Interrupt resolution circuit ...................................................................................................................... 1-48
INT Interrupt .......................................................................................................................................... 1-50
NMI Interrupt ......................................................................................................................................... 1-53
Key Input Interrupt ................................................................................................................................. 1-53
Precautions for Interrupts ...................................................................................................................... 1-56
Watchdog Timer ..................................................................................................................................... 1-58
DMAC....................................................................................................................................................... 1-60
Transfer cycles ...................................................................................................................................... 1-65
DMA enable bit ...................................................................................................................................... 1-67
DMA request bit ..................................................................................................................................... 1-67