CHAPTER 6 DMA FUNCTIONS (DMA CONTROLLER)
User’s Manual U12688EJ4V0UM00
186
Figure 6-8. Timing of Flyby Transfer (DRAM
→
→
→
→
External I/O) (2/3)
(b) Single transfer mode
TI
TI
TI
TI
T0
T1
T1FH
T2
T1FHI
T3
T1FHI
TI
T0
TE
TI
TI
TI
TE
T1
T1FH
T2
T1FHI
T3
T1FHI
TI
TI
Data
Data
Column address
CPU states
DMAC states
CLKOUT
DMARQn
Internal DMA
request signal
DMAAKn
TCn
A0 to A23
D0 to D15
CSm/RASm
BCYST
RD
OE
WE
UWR/UCAS
LWR/LCAS
IORD
IOWR
WAIT
Row
address
Row
address
Column address
Remarks 1. The circles indicate the sampling timing.
2. Broken lines indicate high impedance.
3. n = 0 to 3
m = 0 to 7
Содержание V850E/MS1 UPD703100
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