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M30802FC

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

Udnedveerlopment

CPU

Preliminary Specifications REV.B

Mitsubishi microcomputers

Specifications in this manual are tentative and subject to change. M16C/80 (144-pin version) group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Central Processing Unit (CPU)

The CPU has a total of 28 registers shown in Figure 1.3.1. Seven of these registers (R0, R1, R2, R3, A0,

A1, SB and FB) come in two sets; therefore, these have two register banks.

General register

b15

b0

b31

R2

FLG

R0H R0L

Flag register

R3

R1H R1L

Data register (Note)

R2

b23

R3

A0

A1

SB

Address register (Note)

Static base register (Note)

FB

Frame base register (Note)

High-speed interrupt register

b23

USP

ISP

INTB

PC

b15

SVF

SVP

VCT

User stack pointer

Interrupt stack pointer

Interrupt table register

Program counter

b0

Flag save register

PC save register

Vector register

DMAC related register

b23

b7

b0

DMD0

b15

DMD1

DCT0

DCT1

DRC0

DRC1

DMA0

DMA1

DSA0

DSA1

DRA0

DRA1

DMA mode register

DMA transfer count register

DMA transfer count reload register

DMA memory address register

DMA SFR address register

DMA memory address reload register

Note: These registers have two register banks.

Figure 1.3.1. Central processing unit register

11

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