SH7144 Datasheet, PDF (747/773 Pages) Renesas Technology Corp – Hitachi SuperH RISC engine

Appendix B Pin States of Bus Related Signals
B. Pin States of Bus Related Signals
Table B.1 Pin States of Bus Related Signals (1)
On-chip peripheral module
16-bit space
Pin Name
On-chip
On-chip
Upper
ROM space RAM space 8-Bit space byte
Lower
byte
Word/longword
CS0 to CS3 H
H
H
H
H
H
RD
RH
H
H
H
H
H
W
H
H
H
H
H
WRHH R H
H
H
H
H
H
W
H
H
H
H
H
WRHL R H
H
H
H
H
H
W
H
H
H
H
H
WRH R H
H
H
H
H
H
W
H
H
H
H
H
WRL R H
H
H
H
H
H
W
H
H
H
H
H
A21 to A0 Address
Address
Address
Address
Address
Address
D31 to D24 High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
D23 to D16 High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
D15 to D8 High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
D7 to D0
High-Z
High-Z
High-Z
High-Z
High-Z
Legend:
R: Read
W: Write
Enabled: Chip select signals corresponding to accessed areas=Low
The other chip select signals=High
High-Z
Rev. 2.0, 09/02, page 707 of 732