M16C_62P View Datasheet(PDF) - Mitsumi

Part Name

Description

Manufacturer

M16C_62P

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Mitsumi 

Udenvdeelropment

Preliminary Specifications Rev.1.0

Specifications in this manual are tentative and subject to change.

Mitsubishi microcomputers

M16C / 62P Group

Central Processing Unit (CPU)

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Central Processing Unit (CPU)

Figure 1.3.1 shows the CPU registers. The CPU has 13 registers. Of these, R0, R1, R2, R3, A0, A1 and FB

comprise a register bank. There are two register banks.

b31

R2

R3

b15

b8 b7

b0

R0H(R0's high bits) R0L(R0's low bits)

R1H(R1's high bits)R1L(R1's low bits)

R2

R3

A0

A1

FB

Data registers (Note)

Address registers (Note)

Frame base registers (Note)

b19

b15

b0

INTBH

INTBL

The upper 4 bits of INTB are INTBH and

the lower 16 bits of INTB are INTBL.

b19

b0

PC

Interrupt table register

Program counter

b15

USP

ISP

SB

b0

User stack pointer

Interrupt stack pointer

Static base register

b15

b0

FLG

Flag register

b15

IPL

b8 b7

b0

U I OB S Z D C

Carry flag

Debug flag

Zero flag

Sign flag

Register bank select flag

Overflow flag

Interrupt enable flag

Stack pointer select flag

Reserved area

Processor interrupt priority level

Reserved area

Note: These registers comprise a register bank. There are two register banks.

Figure 1.3.1. Central Processing Unit Register

(1) Data Registers (R0, R1, R2 and R3)

The R0 register consists of 16 bits, and is used mainly for transfers and arithmetic/logic operations. R1 to

R3 are the same as R0.

The R0 register can be separated between high (R0H) and low (R0L) for use as two 8-bit data registers.

R1H and R1L are the same as R0H and R0L. Conversely, R2 and R0 can be combined for use as a 32-

bit data register (R2R0). R3R1 is the same as R2R0.

(2) Address Registers (A0 and A1)

The register A0 consists of 16 bits, and is used for address register indirect addressing and address

register relative addressing. They also are used for transfers and logic/logic operations. A1 is the same as

A0.

In some instructions, registers A1 and A0 can be combined for use as a 32-bit address register (A1A0).

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