CHAPTER 6 DMA FUNCTIONS (DMA CONTROLLER)
User’s Manual U12688EJ4V0UM00
184
Figure 6-7. Timing of Two-Cycle Transfer (4/4)
(d) Single transfer mode (DRAM
→
→
→
→
Internal peripheral I/O)
TI
DMAC states
TI
D0 to D15
TCn
Internal DMA
request signal
A0 to A23
CLKOUT
TI
T0
TI
T1W
CPU states
T2W
T3
T3
TE
TI
T2W
T2RI
T1
T1R
T3
T2R
T2
T2R
CSm/RASm
OE
RD
WE
IOWR
IORD
DMAAKn
DMARQn
LWR/LCAS
UWR/UCAS
BCYST
Row
address
Column address
Data
WAIT
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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