HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 283
HD6412373R
Manufacturer Part Number
HD6412373R
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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When DDS = 0 or EDDS = 0: When DRAM space is accessed in DMAC or EXDMAC single
address transfer mode, full access (normal access) is always performed. With the DRAM interface,
the DACK or EDACK output goes low from the T
In modes other than DMAC or EXDMAC single address transfer mode, burst access can be used
when accessing DRAM space.
Figure 6.42 shows the DACK or EDACK output timing for the DRAM interface when DDS = 0 or
EDDS = 0.
Read
Write
Note: n = 2 to 5
Figure 6.42 Example of DACK/EDACK Output Timing when DDS = 0 or EDDS = 0
DACK or EDACK
φ
Address bus
RASn (CSn)
UCAS, LCAS
WE (HWR)
OE (RD)
Data bus
WE (HWR)
OE (RD)
Data bus
T
p
Row address
(RAST = 0, CAST = 1)
High
High
T
r
r
state.
Rev.7.00 Mar. 18, 2009 page 215 of 1136
T
c1
Column address
Section 6 Bus Controller (BSC)
T
c2
REJ09B0109-0700
T
c3
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