CHAPTER 6 DMA FUNCTIONS (DMA CONTROLLER)
User’s Manual U12688EJ4V0UM00
187
Figure 6-8. Timing of Flyby Transfer (DRAM
→
→
→
→
External I/O) (3/3)
(c) Single-step transfer mode
TI
TI
TI
TI
WAIT
IOWR
IORD
LWR/LCAS
UWR/UCAS
OE
RD
BCYST
A0 to A23
D0 to D15
CSm/RASm
CLKOUT
DMARQn
DMAAKn
TCn
Internal DMA
request signal
CPU states
DMAC states
T1
T1FH
T3
T1FHI
T2
T1FHI
T0
T3
T1FHI
T1
T1FH
T2
T1FHI
TE
TI
T0
TI
TE
TI
WE
Data
Data
Column address
Row
address
Column address
Row
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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