HD6433935 Hitachi, HD6433935 Datasheet - Page 162

• Manufacturer Part Number: HD6433935
• Description: 8-Bit MICROCONTROLLER
• Manufacturer: Hitachi

4. Port mode register 3 (PMR3)
PMR3 is an 8-bit read/write register, controlling the selection of pin functions for port 3 pins.
Upon reset, PMR3 is initialized to H'04.
Bits 7, 6, and 0: Reserved bits
These bits are reserved: they are always read as 0 and cannot be modified.
Bit 5: Watchdog timer source clock select (WDCKS)
This bit selects the watchdog timer source clock.
Bit 5
WDCKS
0
1
Bit 4: TMIG noise canceler select (NCS)
This bit controls the noise canceler for the input capture input signal (TMIG).
Bit 4
NCS
0
1
Bit 3: P4
This bit selects whether P4
Bit 3
IRQ0
0
1
150
Bit
Initial value
Read/Write
3
/IRQ
Description
ø/8192 selected
øw/32 selected
Description
Noise cancellation function not used
Noise cancellation function used
Description
Functions as P4
Functions as IRQ
0
function switch (IRQ0)
—
—
7
0
3
/IRQ
—
—
3
6
0
0
input
0
input
is used as P4
WDCKS
R/W
5
0
3
or as IRQ
NCS
R/W
4
0
0
.
IRQ0
R/W
3
0
RESO
R/W
2
1
R/W
UD
1
0
(initial value)
(initial value)
(initial value)
—
—
0
0