HD64F3664BPV Datasheet, PDF (146/446 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 9 I/O Ports
9.1.1 Port Mode Register 1 (PMR1)
PMR1 switches the functions of pins in port 1 and port 2.
Initial
Bit
Bit Name Value R/W Description
7
IRQ3
0
R/W P17/IRQ3/TRGV Pin Function Switch
This bit selects whether pin P17/IRQ3/TRGV is used as
P17 or as IRQ3/TRGV.
0: General I/O port
1: IRQ3/TRGV input pin
6
IRQ2
0
R/W P16/IRQ2 Pin Function Switch
This bit selects whether pin P16/IRQ2 is used as P16 or
as IRQ2.
0: General I/O port
1: IRQ2 input pin
5
IRQ1
0
R/W P15/IRQ1 Pin Function Switch
This bit selects whether pin P15/IRQ1 is used as P15 or
as IRQ1.
0: General I/O port
1: IRQ1 input pin
4
IRQ0
0
R/W P14/IRQ0 Pin Function Switch
This bit selects whether pin P14/IRQ0 is used as P14 or
as IRQ0.
0: General I/O port
1: IRQ0 input pin
3

1

Reserved
2

1

These bits are always read as 1.
1
TXD
0
R/W P22/TXD Pin Function Switch
This bit selects whether pin P22/TXD is used as P22 or
as TXD.
0: General I/O port
1: TXD output pin
Rev. 6.00 Mar. 24, 2006 Page 116 of 412
REJ09B0142-0600