M16C62_N Datasheet, PDF (539/621 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

External Buses
Mitsubishi microcomputers
M16C / 62 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
5.4.3 8-bit Memory to 8-bit Width Data Bus Connection Example
Figure 5.4.4 shows an example of connecting two M5M5278's (8-bits SRAM) to an 8-bit data bus.In this
diagram, when reset the microcomputer starts operating in single-chip mode. Change this mode to
memory expansion mode in a program.
M16C/62 group
CNVSS
WR
BYTE
D0 to D7
CS0
CS1
RD
A0 to A14
CS0 _S
RD
OE
A14
to
A0
WR
W
DQ1 ^D0
to ^to
DQ8 ^D7
M5M5278D
CS1
S
RD _OE
A14
to
A0
WR
W
DQ1 ^D0
to ^to
DQ8 ^D7
M5M5278D
Figure 5.4.4. Example of connecting two M5M5278's to an 8-bit data bus
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