M16C62_N Datasheet, PDF (537/621 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

External Buses
Mitsubishi microcomputers
M16C / 62 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
5.4.2 8-bit Memory to 16-bit Width Data Bus Connection Example
Figure 5.4.2 shows an example of connecting two M5M5278's (8-bits SRAM) to a 16-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
BYTE
WRH
WRL
D0 to D15
CS0
RD
A1 to A15
CS0
S
RD _OE
A15
to ^A14
A1 ^to
A0
WRL
W
DQ1
to
D0
to
DQ8 ^D7
M5M5278D
CS0
S
RD
OE
A15 _A14
to _to
A1 _A0
WRH
W
DQ1 ^D8
to ^to
DQ8 ^D15
M5M5278D
Figure 5.4.2. Example of connecting two M5M5278's to a 16-bit data bus
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