4. Port mode register 4 (PMR4)
Bit
7
6
5
4
3
2
1
0
NMOD7 NMOD6 NMOD5 NMOD4 NMOD3 NMOD2 NMOD1 NMOD0
Initial value
Read/Write
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PMR4 is an 8-bit read/write register that controls whether individual port 2 pins are CMOS
outputs or NMOS open-drain outputs when 1 is set in PCR2.
Upon reset, PMR4 is initialized to H'00.
Bit n: NMOS open-drain output select (NMODn)
These bits select NMOS open-drain output when pin P2n is used as an output pin.
Bit n
NMODn
Description
0
1
CMOS output
(initial value)
(n = 7 to 0)
NMOS open-drain output
143
ETC [ ETC ]
