Datasheet

870
Table C.4 Pin Settings for Normal External Space
16-Bit Space
Pin Name 8-Bit Space Upper Word Lower Word Word/Longword
CS0–CS3 Valid Valid Valid Valid
RAS
*
1
HH H H
CASHH
*
2
HH H H
CASHL
*
2
HH H H
CASLH
*
2
HH H H
CASLL
*
2
HH H H
RD/WR H H H H
AH LL L L
RD RL L L L
WH H H H
WRHH RH H H H
WH H H H
WRHL RH H H H
WH H H H
WRLH RH H H H
WH L H L
WRLL RH H H H
WL H L L
A21–A0 Address Address Address Address
D31–D24 High-Z High-Z High-Z High-Z
D23–D16 High-Z High-Z High-Z High-Z
D15–D8 High-Z Data High-Z Data
D7–D0 Data High-Z Data Data