Hitachi H8/3937 Series Hardware Manual page 150

Bit 4: P1 /IRQ /ADTRG pin function switch (IRQ4)
4 4
This bit selects whether pin P1
Bit 4
IRQ4 Description
0 Functions as P1
Functions as IRQ
1
Note: For details of ADTRG pin setting, see 12.3.2, Start of A/D Conversion by External Trigger.
Bit 3: P1 /TMIG pin function switch (TMIG)
3
This bit selects whether pin P1
Bit 3
TMIG Description
0 Functions as P1
1 Functions as TMIG input pin
Bit 2: P1 /TMOFH pin function switch (TMOFH)
2
This bit selects whether pin P1
Bit 2
TMOFH Description
0 Functions as P1
1 Functions as TMOFH output pin
Bit 1: P1 /TMOFL pin function switch (TMOFL)
1
This bit selects whether pin P1
Bit 1
TMOFL Description
0 Functions as P1
1 Functions as TMOFL output pin
138
/IRQ /ADTRG is used as P1
4 4
I/O pin
4
/ADTRG input pin
4
/TMIG is used as P1
3 3
I/O pin
3
/TMOFH is used as P1
2
I/O pin
2
/TMOFL is used as P1
1
I/O pin
1
or as IRQ
/ADTRG.
4 4
or as TMIG.
or as TMOFH.
2
or as TMOFL.
1
(initial value)
(initial value)
(initial value)
(initial value)