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Port Pull-Up Control Register 1 (PUCR1)
Bit
7
PUCR1
Initial value
0
Read/Write
R/W
PUCR1 controls whether the MOS pull-up of each of the port 1 pins P1
or off. When a PCR1 bit is cleared to 0, setting the corresponding PUCR1 bit to 1 turns on the
MOS pull-up for the corresponding pin, while clearing the bit to 0 turns off the MOS pull-up.
Note: * Pin 1
and the associated function are not implemented on the H8/38124 Group.
6
Port Mode Register 1 (PMR1)
Bit
7
IRQ3
Initial value
0
Read/Write
R/W
PMR1 is an 8-bit read/write register, controlling the selection of pin functions for port 1 pins.
IRQ
IRQ
IRQ
Bit 7—P1
/IRQ
/TMIF Pin Function Switch (IRQ3)
7
3
This bit selects whether pin P1
Bit 7
IRQ3
Description
0
Functions as P1
Functions as IRQ
1
Note: Rising or falling edge sensing can be designated for IRQ
settings, see 3. Timer Control Register F (TCRF) in section 9.4.2.
Bit 6—Reserved
This bit is reserved; it is always read as 1 and cannot be modified.
Bit 5—Reserved
This bit is reserved; it can only be written with 0.
6
5
PUCR1
—
*
7
6
0
—
R/W
W
6
5
—
—
1
—
—
W
/IRQ
/TMIF is used as P1
7
3
I/O pin
7
/TMIF input pin
3
4
3
PUCR1
PUCR1
4
3
0
0
R/W
R/W
4
3
IRQ4
TMIG
0
0
R/W
R/W
or as IRQ
7
3
, TMIF. For details on TMIF
3
Rev. 6.00, 08/04, page 191 of 628
2
1
—
—
—
—
W
W
, P1
*, P1
, and P1
7
6
4
2
1
—
—
—
1
W
—
/TMIF.
(initial value)
0
—
—
W
is on
3
0
—
—
W
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