Datasheet

Section 9 I/O Ports
Rev.5.00 Nov. 02, 2005 Page 117 of 500
REJ09B0027-0500
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
P22/TXD pin
Register PMR1 PCR2
Bit Name TXD PCR22 Pin Function
Setting Value 0 0 P22 input pin
1 P22 output pin
1 X TXD output pin
Legend: X: Don't care.
P21/RXD pin
Register SCR3 PCR2
Bit Name RE PCR21 Pin Function
Setting Value 0 0 P21 input pin
1 P21 output pin
1 X RXD input pin
Legend: X: Don't care.