Datasheet

Table Of Contents
Section 9 I/O Ports
Rev. 2.00 Jul. 04, 2007 Page 168 of 692
REJ09B0309-0200
9.3.3 Port Mode Register 4 (PMR4)
PMR4 controls the selection of functions for port 4 pins.
Bit Bit Name
Initial
Value
R/W Description
7 to 3 All 1 Reserved
These bits are always read as 1 and cannot be
modified.
2 TMOFH 0 R/W P42/TXD31/IrTXD/TMOFH Pin Function Switch
Selects whether pin P42/TXD31/IrTXD/TMOFH is used
as P42 or TXD31/IrTXD, or as TMOFH.
0: P42 I/O pin or TXD31/IrTXD output pin
1: TMOFH output pin
1 TMOFL 0 R/W P41/RXD31/IrRXD/TMOFL Pin Function Switch
Selects whether pin P41/RXD31/IrRXD/TMOFL is used
as P41 or RXD31/IrRXD, or as TMOFL.
0: P41 I/O pin or RXD31/IrRXD input pin
1: TMOFL output pin
0 TMIF 0 R/W P40/SCK31/TMIF Pin Function Switch
Selects whether pin P40/SCK31/TMIF is used as
P40/SCK31 or as TMIF.
0: P40/SCK31 I/O pin
1: TMIF input pin