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M37640E8FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

Ver 1.4

MITSUBISHI MICROCOMPUTERS

7640 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Φ

SYNCout

RD

WR

Address

Data

EDMA

PC

PC +1

BAL, 00

BAL+1, 00 ADL+Y,ADH

ADL+Y,

ADH+C

PC + 2

91

BAL

ADL

ADH Invalid

Data

Next

OpCode

Fig. 1.13. Instruction sequences for STA ($zz) IndY with EDMA Enable

Φ

SYNCout

RD

WR

Address

Data

EDMA

[LDA ($zz),Y (T = “0”)] Instruction Sequence (EDMA)

PC

PC +1

BAL, 00 BAL+1, 00 ADL+Y,ADH

ADL+Y,

ADH+C

PC + 2

B1

BAL

ADL

ADH

Invalid

Data

Next

OpCode

Φ

SYNCout

RD

WR

Address

Data

EDMA

[LDA ($zz),Y (T = “1”)] Instruction Sequence (EDMA)

PC

PC +1

BAL, 00 BAL+1, 00 ADL+Y,ADH

ADL+Y,

ADH+C

B1

BAL

ADL

ADH

Invalid

Data

X, 00

Invalid

PC 2

Data Next

OpCode

Fig. 1.14. Instruction sequences for LDA ($zz) IndY with EDMA Enable

15

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