Two 8-Bit And 16-Bit Memory To 16-Bit Width Data Bus Connection Example - Renesas M30245 Series User Manual

M30245 Group

4.3.4 Two 8-bit and 16-Bit Memory to 16-Bit Width Data Bus Connection Example

Figure 4.3.5 shows an example of connecting M5M28F102 (16-bit flash memory) and two M5M5278's (8-
bit SRAM) to a 16-bit data bus.
M i c r o c o m p u t e r
C N V W R H
S S
B Y T E W R L
A t o A
1
D t o D
0
C S 1
CS0
RD
Figure 4.3.5. Example of connection of two 8-bit memories and one 16-bit memory to 16-bit width data bus
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
1 6
A
1 5
W
A
1 4
t o
t o
A
1 O E
A
0
S
D
1
to t o
D
8
M 5 M 5 2 7 8 D
1 5
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A
1 5
W
A
14
t o
RD to RD
A
1 OE
A
0
CS1 CS1
S
D D
0
D
1
to to
D D
7
D
8
M5M5278D
4. External Buses
V
CC
A
1 5
t o
C S 0
CE
A
0
D
1 5
D
15
t o
8
to
D
0
D
0
1 5
R D
OE WE
M 5 M 2 8 F 1 0 2
A
1 6
to
A
1