SH7040 Datasheet, PDF (243/923 Pages) Renesas Technology Corp – Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)

10.8 Memory Connection Examples
Figures 10.23–10.31 show examples of the memory connections.
As A21–A18 become input ports in power-on reset, they should be handled (e.g.
pulled down) as necessary.
SH704x
CSn
RD
A0–A14
D0–D7
32k × 8 bits
ROM
CE
OE
A0–A14
I/O0–I/O7
Figure 10.23 8-Bit Data Bus Width ROM Connection
SH704x
CSn
RD
A0
A1–A18
D0–D15
256k × 16 bits
ROM
CE
OE
A0–A17
I/O0–I/O15
Figure 10.24 16-Bit Data Bus Width ROM Connection
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