HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 182

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

Example 3: Connection to 2CAS 4-Mbit DRAM (16-Mbyte Mode): Figure 7-11 shows typical
interconnections to a single 2CAS 4-Mbit DRAM, and the corresponding address map.
Figure 7-12 shows a setup procedure to be followed by a program for this example.
The DRAM in this example has 9-bit row addresses and 9-bit column addresses. Its address area is
H'600000 to H'67FFFF.
Figure 7-11 Interconnections and Address Map for 2CAS 4-Mbit DRAM (Example)
H8/3048 Series
H'600000
H'67FFFF
H'680000
H'7FFFFF
D
15
HWR
to D
LWR
CS
RD
A
A
A
A
A
A
A
A
A
9
8
7
6
5
4
3
2
1
3
0
DRAM area
Not used
a. Interconnections (example)
b. Address map
168
Area 3 (16-Mbyte mode)
2
row address, 9-bit column address,
and
CAS
A
A
A
A
A
A
A
A
A
RAS
UCAS
LCAS
WE
OE
I/O
8
7
6
5
4
3
2
1
0
15
16-bit organization
4-Mbit DRAM with 9-bit
to I/O
0