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| HD6413003RF Datasheet, PDF (174/715 Pages) Renesas Technology Corp – Microcontroller (MCU) | |||
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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.
H8/3003
A9
A8
A7
A6
A5
A4
A3
A2
A1
CS 3
HWR
LWR
RD
D15 to D 0
2 CAS 4-Mbit DRAM with 9-bit
row address, 9-bit column address,
and à 16-bit organization
A8
A7
A6
A5
A4
A3
A2
A1
A0
RAS
UCAS
LCAS
WE
OE
I/O15 to I/O 0
a. Interconnections (example)
H'600000
H'67FFFF
H'680000
DRAM area
Not used
Area 3 (16-Mbyte mode)
H'7FFFFF
b. Address map
Figure 7-11 Interconnections and Address Map for 2CAS 4-Mbit DRAM (Example)
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