Datasheet

Appendix C I/O Port Block Diagrams
Rev. 4.00 Sep 27, 2006 page 1122 of 1130
REJ09B0327-0400
D
R
QD
PBnODR
C
Reset
(D2, D3)
(D2, D3)
R
Q
PBnDDR
C
Reset
EXPE
External
address write
ABW
WPBD
WPB
HIF
CS3 input
CS4 input
External address
read
RPBO
RPB
PBn
Mode 2, 3
EXPE
CS input enable
HI12E
WPBD:
WPB:
RPBO:
RPB:
Note: n = 2, 3
Legend:
Write to PBDDR
Write to PBODR
Read PBODR
Read port B
Internal data bus
Hardware
standby
Figure C.38 Port B Block Diagram (Pins PB2 and PB3)