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8. I/O Ports
Table 8.3 (b)
H8/3854 Group Port 1 Pin Functions
Pin
Pin Functions and Selection Method
P1
/IRQ
/TMIF
The pin function depends on bit IRQ3 in PMR1, bits CKSL2 to CKSL0 in TCRF,
7
3
and bit PCR1
IRQ3
PCR1
CKSL2 to CKSL0
Pin function
Note: When using as TMIF input pin, clear bit IEN3 in IENR1 to 0, disabling
P1
/IRQ
/TMIB
The pin function depends on bit IRQ1 in PMR1, bits TMB2 to TMB0 in TMB, and
5
1
bit PCR1
IRQ1
PCR1
TMB2 to TMB0
Pin function
Note: When using as TMIB input pin, clear bit IEN1 in IENR1 to 0, disabling
P1
/TMOFH
The pin function depends on bit TMOFH in PMR1 and bit PCR1
2
TMOFH
PCR1
Pin function
P1
/TMOFL
The pin function depends on bit TMOFL in PMR1 and bit PCR1
1
TMOFL
PCR1
Pin function
P1
/TMOW
The pin function depends on bit TMOW in PMR1 and bit PCR1
0
TMOW
PCR1
Pin function
Legend: * Don't care
Rev.3.00 Jul. 19, 2007 page 180 of 532
REJ09B0397-0300
in PCR1.
7
0
7
P1
input pin
7
IRQ
interrupts.
3
in PCR1.
5
0
5
P1
input pin
5
IRQ1 interrupts.
0
2
P1
input pin
2
0
1
P1
input pin
1
0
0
P1
input pin
0
0
1
***
output pin IRQ
P1
7
0
1
***
output pin IRQ
P1
5
0
1
P1
output pin
2
0
1
P1
output pin
1
0
1
P1
output pin
0
1
*
Not 0**
0**
IRQ
input pin
/TMIF
3
3
input pin
1
*
Not 111
111
IRQ
input pin
/TMIB
1
1
input pin
in PCR1.
2
1
*
TMOFH output pin
in PCR1.
1
1
*
TMOFL output pin
in PCR1.
0
1
*
TMOW output pin
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