h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 173
h8s-2172
Manufacturer Part Number
h8s-2172
Description
Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2172.pdf
(570 pages)
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When DDS = 0: When DRAM space is accessed in DMAC single address transfer mode, full
access (normal access) is always performed. With the DRAM interface, the DACK output goes
low from the T
In modes other than DMAC single address transfer mode, burst access can be used when accessing
DRAM space.
Figure 6.43 shows the DACK output timing for the DRAM interface when DDS = 0.
Figure 6.42 Example of DACK Output Timing when DDS = 1 (RAST = 0, CAST = 0)
Read
Write
r
state.
φ
Address bus
Data bus
Data bus
(
(
(
(
(
,
)
)
)
)
)
T
p
Row address
High
High
T
r
T
c1
Rev. 2.00, 03/04, page 141 of 534
Column address
T
c2
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