Table of Contents
Advertisement
Example 2: Connection to 2WE 4-Mbit DRAM (16-Mbyte Mode): Figure 7-9 shows typical
interconnections to a single 2WE 4-Mbit DRAM, and the corresponding address map. Figure 7-10
www.DataSheet4U.com
shows a setup procedure to be followed by a program for this example.
The DRAM in this example has 10-bit row addresses and 8-bit column addresses. Its address area
is H'600000 to H'67FFFF.
H8/3048 Series
H'600000
H'67FFFF
H'680000
H'7FFFFF
Figure 7-9 Interconnections and Address Map for 2WE 4-Mbit DRAM (Example)
A
18
A
17
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
CS
3
RD
HWR
LWR
D
to D
15
0
a. Interconnections (example)
DRAM area
Not used
b. Address map
166
WE
2
4-Mbit DRAM with 10-bit
row address, 8-bit column address,
×
and
16-bit organization
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
RAS
CAS
UW
LW
OE
I/O
to I/O
15
0
Area 3 (16-Mbyte mode)
Advertisement
Table of Contents
