HD64F38602R Datasheet, PDF (156/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 8 I/O Ports
8.1.6 Input Pull-Up MOS
Port 1 has an on-chip input pull-up MOS function that can be controlled by software. When a
PCR1 bit is cleared to 0, setting the corresponding PUCR1 bit to 1 turns on the input pull-up MOS
for that pin. The input pull-up MOS function is in the off state after a reset.
PCR1n
PUCR1n
Input Pull-Up MOS
[Legend] x: Don't care.
0
0
1
Off
On
(n = 2 to 0)
1
x
Off
8.2 Port 3
Port 3 is an I/O port also functioning as an SCI3/IrDA I/O pin, comparator reference voltage pin
and interrupt pin. Figure 8.2 shows its pin configuration.
P32/TXD3/IrTXD
P31/RXD3/IrRXD
P30/SCK3/VCref (/IRQ0)
Figure 8.2 Port 3 Pin Configuration
Port 3 has the following registers.
• Port data register 3 (PDR3)
• Port control register 3 (PCR3)
• Port pull-up control register 3 (PUCR3)
• Port mode register 3 (PMR3)
Rev. 3.00 May 15, 2007 Page 124 of 516
REJ09B0152-0300