Renesas F-ZTAT H8 Series, Hardware Manual

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8. I/O Ports
Rev.3.00 Jul. 19, 2007 page 186 of 532
REJ09B0397-0300
Port Mode Register 4 (PMR4)
Bit 7 6 5 4 3 2 1 0
NMOD7 NMOD6 NMOD5 NMOD4 NMOD3 NMOD2 NMOD1 NMOD0
Initial value 0 0 0 0 0 0 0 0
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
PMR4 is an 8-bit read/write register, used to select CMOS output or NMOS open drain output for
each port 2 pin.
Upon reset, PMR4 is initialized to H'00.
Bit n—NMOS Open-Drain Output Select (NMODn): This bit selects NMOS open-drain output
when pin P2
n
is used as an output pin.
Bit n: NMODn Description
0 CMOS output (initial value)
1 NMOS open-drain output
Note: n = 7 to 0