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H8/3002 Datasheet(PDF) 236 Page - Renesas Technology Corp

Part # H8/3002
Description  Microcomputer
PDF  700 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3002 Datasheet(HTML) 236 Page - Renesas Technology Corp

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Figure 8-14 shows the timing when the DMAC is activated by low input at a
DREQ pin. This
example shows a word-size transfer from a 16-bit two-state access area to another 16-bit two-state
access area. The DMAC continues the transfer while the
DREQ pin is held low.
Figure 8-14 Bus Timing of DMA Transfer Requested by Low
DREQ Input
ø
DREQ
RD
HWR
TEND
T1
T2
T3
Td
T1
T2
T1
T2
T1
T2
Td
T1
T2
T1
T2
T1
T2
LWR
,
CPU cycle
DMAC cycle
CPU cycle
DMAC cycle
(last transfer cycle)
CPU cycle
Source
address
Destination
address
Source
address
Destination
address
Address
bus
222



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