Hitachi H8/3937 Series Hardware Manual page 470

PMR3—Port mode register 3
Bit 7
—
Initial value 0
Read/Write —
PMR4—Port mode register 4
Bit 7
—
Initial value 0
Read/Write —
Note: When the PCR2 specification is 1 (output port specification)
458
6 5 4
— WDCKS NCS
0 0 0
— R/W R/W
TMIG noise canceler select
0 Noise cancellation function not used
1 Noise cancellation function used
Watchdog timer switch
0 ø8192
1 øw/4
6 5
— —
0 0
— —
H'CA
3 2 1
IRQ0 RESO UD
0 0 0
R/W R/W R/W
P3 /UD pin function switch
1
0 Functions as P3
1 Functions as UD input pin
P3 /RESO pin function switch
2
0 Functions as P3
1 Functions as RESO I/O pin
P4 /IRQ0 pin function switch
3
0 Functions as P4 I/O pin
3
1 Functions as IRQ input pin
0
H'CB
4 3
NMOD4 NMOD3 NMOD2
0 0
R/W R/W
0 CMOS setting
1 NMOS open-drain setting
I/O port
0
—
0
—
I/O pin
1
I/O pin
2
I/O port
2 1
NMOD1 NMOD0
0 0
R/W R/W R/W
(n = 4 to 0)
0
0