HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 214

• Manufacturer Part Number: HD6412332
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

6.6.2
When DRAM space is accessed in DMAC single address 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 mode, burst access can be used when accessing DRAM
space.
Figure 6.29 shows the DACK output timing for the DRAM interface when DDS = 0.
Rev.4.00 Sep. 07, 2007 Page 184 of 1210
REJ09B0245-0400
Note: n = 2 to 5
Read
Write
Figure 6.29 DACK Output Timing when DDS = 0 (Example of DRAM Access)
When DDS = 0
A
CS
CAS (UCAS)
LCAS (LCAS)
HWR (WE)
D
HWR (WE)
D
DACK
φ
23
15
15
n
to A
to D
to D
(RAS)
0
0
0
T
p
Row
T
r
T
c1
Column
T
c2
r
state.