Rev. 6.00, 08/04, page 198 of 628
Port Mode Register 2 (PMR2)
Bit
7
6
5
4
3
2
1
0
—
—
POF1
—
—
WDCKS
NCS
IRQ0
Initial value
1
1
0
1
1
0
0
0
Read/Write
—
—
R/W
—
—
R/W
R/W
R/W
PMR2 is an 8-bit read/write register. It controls whether the PMOS transistor internal to P3
5
is on
or off, the selection of the watchdog timer clock, the selection of TMIG noise cancellation, and
switching of the P4
3
/
IRQ
0
pin functions.
Upon reset, PMR2 is initialized to H'D8.
This section only deals with the bit that controls whether the PMOS transistor internal to pin P3
5
is
on or off. For the functions of the other bits, see the descriptions of port 1 (WDCKS and NCS) and
port 4 (IRQ0).
Bit 5—Pin P3
5
PMOS Transistor Control (POF1)
This bit selects whether the PMOS transistor of the output buffer for pin P3
5
is on or off.
Bit 5
POF1
Description
0
CMOS output
(initial value)
1
NMOS open-drain output
Note:
The pin is an NMOS open-drain output when this bit is set to 1 and P3
5
is an output.
Содержание H8/38024 Series
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