Datasheet

Appendix C I/O Port Block Diagrams
Rev. 4.00 Sep 27, 2006 page 1123 of 1130
REJ09B0327-0400
D
R
QD
PBnODR
C
Reset
(D7 to D4)
(D7 to D4)
R
Q
PBnDDR
C
Reset
EXPE
External
address write
Hardware
standby
ABW
WPBD
WPB
External address
read
RPBO
RPB
PBn
Internal data bus
WPBD:
WPB:
RPBO:
RPB:
Note: n = 4 to 7
Write to PBDDR
Write to PBODR
Read PBODR
Read port B
Legend:
Figure C.39 Port B Block Diagram (Pins PB4 to PB7)