H8-3857 Datasheet, PDF (201/560 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcomputer

8. I/O Ports
In the H8/3854 Group, bit 6 is reserved, and must always be cleared to 0.
Bit 5—P1₅/IRQ₁/TMIB Pin Function Switch (IRQ1): This bit selects whether pin
P1₅/IRQ₁/TMIB is used as P1₅ or as IRQ₁/TMIB.
Bit 5: IRQ1
Description
0
1
Note:
Functions as P1₅ I/O pin
(initial value)
Functions as IRQ /TMIB input pin
1
Rising or falling edge sensing can be designated for IRQ /TMIB.
1
For details on TMIB pin settings, see Timer Mode Register B (TMB) in section 9.3.2,
Register Descriptions.
Bit 4—P1₄/PWM Pin Function Switch (PWM): This bit selects whether pin P1₄/PWM is used as
P1₄ or as PWM.
Bit 4: PWM
0
1
Description
Functions as P1₄ I/O pin
Functions as PWM output pin
(initial value)
In the H8/3854 Group, bit 4 is reserved, and must always be cleared to 0.
Bit 3—Reserved Bit: Bit 3 is reserved; it should always be cleared to 0.
Bit 2—P1₂/TMOFH Pin Function Switch (TMOFH): This bit selects whether pin P1₂/TMOFH
is used as P1₂ or as TMOFH.
Bit 2: TMOFH
0
1
Description
Functions as P1₂ I/O pin
Functions as TMOFH output pin
(initial value)
Bit 1—P1₁/TMOFL Pin Function Switch (TMOFL): This bit selects whether pin P1₁/TMOFL is
used as P1₁ or as TMOFL.
Bit 1: TMOFL
0
1
Description
Functions as P1₁ I/O pin
Functions as TMOFL output pin
(initial value)
Rev.3.00 Jul. 19, 2007 page 177 of 532
REJ09B0397-0300