HD64336900G Datasheet, PDF (140/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

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
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, 5 
All 0

Reserved
These bits are always read as 0.
4
IRQ0
0
R/W P14/IRQ0 Pin Function Switch
Selects whether pin P14/IRQ0 is used as P14 or as
IRQ0.
0: General I/O port
1: IRQ0 input pin
3, 2 
All 0

Reserved
These bits are always read as 0.
1
TXD
0
R/W P22/TXD Pin Function Switch
Selects whether pin P22/TXD is used as P22 or as TXD.
0: General I/O port
1: TXD output pin
0

0

Reserved
This bit is always read as 0.
Rev. 1.00, 11/03, page 112 of 376