Datasheet

Appendix C I/O Port Block Diagrams
Rev. 6.00 Aug 04, 2006 page 641 of 680
REJ09B0145-0600
P3
4
V
CC
V
CC
SCI31 module
PDR3
4
PCR3
4
SCINV0
SBY
V
SS
PDR3: Port data register 3
PCR3: Port control register 3
PUCR3: Port pull-up control register 3
SCINV0: Bit 0 of serial port control register (SPCR)
RE31
RXD31
Internal data bus
PUCR3
4
Figure C.3 (c) Port 3 Block Diagram (Pin P3
4
)