CHAPTER 5 MEMORY ACCESS CONTROL FUNCTION
User’s Manual U12688EJ4V0UM00
151
5.3.7 DRAM access during DMA flyby transfer
Figure 5-10. DRAM Access Timing During DMA Flyby Transfer (1/2)
(a) In the case of DRAM
→
→
→
→
External I/O
T1
T2
Column address
Row
address
Data
WAIT
D0 to D15
IOWR
IORD
LWR/LCAS
UWR/UCAS
WE
OE
RD
CSn/RASn
BCYST
A0 to A23
CLKOUT
TF
TO1
TO2
TF
TO1
TO2
TF
T3
DMAAKm
Column address
Data
Data
Column address
Remarks 1. This is the timing in the case where wait (TF) insertion setting was carried out according to the
FDW register.
2. The circle indicates the sampling timing.
3. The broken lines indicate high impedance.
4. n = 0 to 7
m = 0 to 3
Содержание V850E/MS1 UPD703100
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