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4. Port Mode Register 3 (PMR3)
Bit
7
AEVL
Initial value
0
Read/Write
R/W
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.
Note: * The RESO bit is not implemented in the H8/38347 Group and H8/38447 Group.
Bit 7: P3
/AEVL pin function switch (AEVL)
7
This bit selects whether pin P3
Bit 7
AEVL
Description
0
Functions as P3
1
Functions as AEVL input pin
Bit 6: P3
/AEVH pin function switch (AEVH)
6
This bit selects whether pin P3
Bit 6
AEVH
Description
0
Functions as P3
1
Functions as AEVH input pin
Bit 5: Watchdog timer source clock select (WDCKS)
This bit selects the watchdog timer source clock.
Bit 5
WDCKS
Description
φ/8192 selected
0
φ
1
/32 selected
w
6
5
AEVH
WDCKS
NCS
0
0
R/W
R/W
R/W
/AEVL is used as P3
7
I/O pin
7
/AEVH is used as P3
6
I/O pin
6
4
3
2
IRQ0
RESO*
0
0
1
R/W
R/W
or as AEVL.
7
or as AEVH.
6
Rev. 6.00 Aug 04, 2006 page 221 of 680
Section 8 I/O Ports
1
0
UD
PWM
0
0
R/W
R/W
(initial value)
(initial value)
(initial value)
REJ09B0145-0600
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