9 2-cycle transfer (sdram/fcram -> i/o), Cycle transfer (i/o -> sdram/fcram), Cycle transfer (sdram/fcram -> i/o) – FUJITSU MB91460 SERIES FR60 User Manual
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Chapter 31 External Bus
10.DMA Access Operation
■
2-Cycle Transfer (I/O -> SDRAM/FCRAM)
Figure 4.10 - 11 shows an operation timing chart assuming TYP3 to TYP0 set to 1000B, AWR set to 0051H, and
IOWR set to 00H.
Figure 10-11 Timing Chart for Two - cycle Transfer (I/O to SDRAM/FCRAM)
10.9 2-Cycle Transfer (SDRAM/FCRAM -> I/O)
This section describes the operation of two - cycle transfer (SDRAM/FCRAM to I/O device).
■
2-Cycle Transfer (SDRAM/FCRAM -> I/O)
Figure 1.10 - 12 shows a timing chart for two - cycle transfer (SDRAM/FCRAM to I/O)
MC LK
A31 to 0
AS
CS n
memory
address
I/O
address
idle
WR n(SWE)
RD
D31 to 0
CSn
DACKn
DEOPn
DACKn
DEOPn
DR EQn
FR30
compatible
mode
Basic mode
SRAS
SCAS
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