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

16-bit single-chip microcomputer
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4.3.3 8-bit Memory to 8-bit Width Data Bus Connection Example

Figure 4.3.4 shows an example of connecting two M5M5278's (SRAM) to an 8-bit data bus.In this dia-
gram, when reset the microcomputer starts operating in single-chip mode. Change this mode to memory
expansion mode in a program.
M i c r o c o m p u t e r
C N V
S S
D
t o D
0
B Y T E
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t o A
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Figure 4.3.4. Example of connecting two M5M5278's to an 8-bit data bus
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
W R
7
C S 0
C S 0
S
C S 1
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to
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M5M5278D
1 4
page 337 of 354
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1
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t o
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DQ
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4. External Buses
W R
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C S 1
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M 5 M 5 2 7 8 D

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