M37640E8FP 查看數據表（PDF） - Mitsumi

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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

Φout

SYNCout

RD

WR

Address

Data

DMAC Transfer

Signal (Port33)

Transfer Request

Source (active low)

Transfe Request

Source Sampling

Transfer Request

Source Sample

Latch Reset

LDA$zz

STA $zz

(first cycle)

DMAC Transfer

Next

STA $zz (last 2 cycles) Inst.

PC

PC + 1

ADL1, 00

PC + 2

DMA Source DMA Dest.

PC + 3

ADL2, 00

PC + 4

Address

Address

A5

ADL1

Data

85

DMA Data

DMA Data

ADL2

Data

OpCode3

Fig. 1.86. DMAC Transfer-Hardware Source Initiated

Φout

SYNCout

RD

WR

Address

Data

DMAC Transfer

Signal (Port33)

Transfer Request

Source (active low)

Transfer Request

Source Sampling

Transfer Request

Source Sample

Latch Reset

LDM #$90, $41

Single cycle Single cycle Single cycl

Inst.

Inst.

Inst.

DMAC Transfer

Next

Inst.

PC

PC + 1

PC + 2

42,00

PC + 3

PC + 4

PC + 5

DMA Source

Address

DMA Dest.

Address

PC + 6

3C

18

41

90

OpCode2

OpCode3

OpCode4

DMA Data

DMA Data OpCode5

Fig. 1.87. DMAC Transfer-Software Trigger Initiated

Φout

SYNCout

RD

WR

Address

Data

DMAC Transfer

Signal (Port33)

Transfer Request

Source (active low)

Transfe Request

Source Sampling

Transfer Request

Source Sample

Latch Reset

LDA $zz

STA $zz

(first cycle)

DMAC Transfer

STA $zz (second cycle)

PC

PC + 1

ADL1, 00

PC + 2

DMA Source

Address1

DMA Dest.

Address1

DMA Source

Address2

DMA Dest.

Address2

PC + 3

A5

ADL1

Data

85

DMA Data1

DMA Data1

DMA Data2

DMA Data2 ADL2

Fig. 1.88. DMAC Transfer-Burst Transfer Initiated

71

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