參數(shù)資料
型號: M37640E8
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCONTROLLER
中文描述: 單芯片8位CMOS單片機(jī)
文件頁數(shù): 89/172頁
文件大小: 1193K
代理商: M37640E8
7600 Series
Mitsubishi Microcomputer
M37640E8-XXXF Preliminary Specification
Direct Memory Access Controller
7/9/98
2-77
Figure 2-98. DMAC Transfer - Hardware Source Initiated
Figure 2-99. DMAC Transfer - Software Trigger Initiated
Φ
out
SYNC
out
RD
WR
Address
Data
A5
ADL1
Data
85
DMA Data
DMA Data
ADL2
ADL2, 00
DMA Dest.
Address
DMA Source
Address
PC + 2
ADL1, 00
PC + 1
PC
PC + 3
OpCode3
PC + 4
LDA$zz
STA $zz
(first cycle)
DMAC Transfer
STA $zz (last 2 cycles)
Data
DMAC Transfer
Signal (Port3
3
)
Transfer Request
Source (active low)
Transfer Request
Source Sampling
Transfer Request
Source Sample
Latch Reset
Next
Inst.
3C
18
41
90
OpCode2
DMA Data
OpCode3
DMA Dest.
Address
DAddress
42,00
PC + 2
PC + 1
PC
PC + 3
OpCode5
PC + 4
LDM #$90, $41
Single cycle
Inst.
DMAC Transfer
Next
Inst.
PC + 6
DMA Data
Φ
out
SYNC
out
RD
WR
Address
Data
DMAC Transfer
Signal (Port3
3
)
Transfer Request
Source (active low)
Transfer Request
Source Sampling
Transfer Request
Source Sample
Latch Reset
OpCode4
PC + 5
Single cycle
Inst.
Single cycle
Inst.
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