Datasheet

Section 9 I/O Ports
Rev. 4.00 Mar. 15, 2006 Page 118 of 556
REJ09B0026-0400
9.2.3 Port Mode Register 3 (PMR3)
PMR3 selects the CMOS output or NMOS open-drain output for port 2.
Bit Bit Name
Initial
Value R/W Description
7 to 5  All 0  Reserved
These bits are always read as 0.
4
3
POF24
POF23
0
0
R/W
R/W
When the bit is set to 1, the corresponding pin is cut off
by PMOS and it functions as the NMOS open-drain
output. When cleared to 0, the pin functions as the CMOS
output.
2 to 0  All 1  Reserved
These bits are always read as 1.
9.2.4 Pin Functions
The correspondence between the register specification and the port functions is shown below.
• P24 pin
Register PCR2
Bit Name PCR24 Pin Function
Setting Value 0 P24 input pin
1 P24 output pin
• P23 pin
Register PCR2
Bit Name PCR23 Pin Function
Setting Value 0 P23 input pin
1 P23 output pin