Datasheet

Section 9 I/O Ports
Rev. 2.00 Jul. 04, 2007 Page 161 of 692
REJ09B0309-0200
9.2.2 Port Control Register 3 (PCR3)
PCR3 selects inputs/outputs in bit units for pins of
port 3.
Bit Bit Name
Initial
Value
R/W Description
7
6
PCR37
PCR36
0
0
W
W
Setting a PCR3 bit to 1 makes the corresponding pin
(P37 or P36) an output pin, while clearing the bit to 0
makes the pin an input pin. The settings in PCR3 and in
PDR3 are valid when the corresponding pin is
designated as a general I/O pin.
PCR3 is a write-only register. These bits are always
read as 1.
5 to 3  All 1  Reserved
These bits are always read as 1 and cannot be
modified.
2
1
0
PCR32
PCR31
PCR30
0
0
0
W
W
W
Setting a PCR3 bit to 1 makes the corresponding pins
(P32 to P30) an output pin, while clearing the bit to 0
makes the pin an input pin. The settings in PCR3 and in
PDR3 are valid when the corresponding pin is
designated as a general I/O pin.
PCR3 is a write-only register. These bits are always
read as 1.