4. Port mode register 1 (PMR1)
Bit
7
IRQ3
0
6
IRQ2
0
5
IRQ1
0
4
IRQ4
0
3
2
1
0
TMIG TMOFH TMOFL TMOW
Initial value
Read/Write
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PMR1 is an 8-bit read/write register, controlling the selection of pin functions for port 1 pins.
Upon reset, PMR1 is initialized to H'00.
Bit 7: P17/IRQ3/TMIF pin function switch (IRQ3)
This bit selects whether pin P17/IRQ3/TMIF is used as P17 or as IRQ3/TMIF.
Bit 7
IRQ3
Description
0
1
Functions as P17 I/O pin
Functions as IRQ3/TMIF input pin
(initial value)
Note: Rising or falling edge sensing can be designated for IRQ3/TMIF. For details on TMIF
settings, see 3. Timer Control Register F (TCRF) in 9.4.2.
Bit 6: P16/IRQ2 pin function switch (IRQ2)
This bit selects whether pin P16/IRQ2 is used as P16 or as IRQ2.
Bit 6
IRQ2
Description
0
1
Functions as P16 I/O pin
Functions as IRQ2 input pin
(initial value)
Note: Rising or falling edge sensing can be designated for IRQ2.
Bit 5: P15/IRQ1/TMIC pin function switch (IRQ1)
This bit selects whether pin P15/IRQ1/TMIC is used as P15 or as IRQ1/TMIC.
Bit 5
IRQ1
Description
0
1
Functions as P15 I/O pin
Functions as IRQ1/TMIC input pin
(initial value)
Note: Rising or falling edge sensing can be designated for IRQ1/TMIC.
For details of TMIC pin setting, see 1. Timer mode register C (TMC) in 9.3.2.
134
ETC [ ETC ]
