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7641 датащи(PDF) 59 Page - Renesas Technology Corp

номер детали 7641
подробное описание детали  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  385 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7641 датащи(HTML) 59 Page - Renesas Technology Corp

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Rev.2.00
Aug 28, 2006
page 42 of 113
7641 Group
REJ09B0336-0200
HARDWARE
FUNCTIONAL DESCRIPTION
φ
OUT
SYNCOUT
RD
WR
A5
ADL185
DMA
data
ADL2
ADL2, 00
DMA desti-
nation add.
DMA
source add.
PC + 2
ADL1, 00
PC + 1
PCPC + 3
PC + 4
LDA $zz
STA $zz
DMA transfer
STA $zz (last 2 cycles)
Data
DMAOUT
(Port P33)
Address
Data
Transfer request
source (“L” active)
Transfer request source
sampling
Reset of transfer request
source sampling
Next instruction
Op code 3
Data
DMA
data
Fig. 33 Timing chart for cycle steal transfer caused by hardware-related transfer request
3C
18
41
90
42, 00
PC + 2
PC + 1
PCPC + 3
PC + 4
LDM #$90, $41
PC + 6
PC + 5
φ
OUT
SYNCOUT
RD
WR
DMAOUT
(Port P33)
Address
Data
Transfer request
source (“L” active)
Transfer request source
sampling
Reset of transfer request
source sampling
Next instruction
1 cycle
instruction
1 cycle
instruction
1 cycle
instruction
DMA transfer
DMA
data
DMA desti-
nation add.
DMA
source add.
Op code 2
DMA
data
Op code 3
Op code 4
Op code 6
Fig. 34 Timing chart for cycle steal transfer caused by software trigger transfer request



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