CHAPTER 4 PORT FUNCTIONS
User’s Manual U16896EJ2V0UD
94
(4) Port 9 function register H (PF9H)
0
Normal output
N-ch open-drain output
PF9n
0
1
Control of normal output/N-ch open-drain output (n = 8, 9)
PF9H
0
0
0
0
0
PF99
PF98
After reset: 00H R/W Address: FFFFFC73H
Caution When using P98 and P99 as N-ch open-drain-output alternate-function pins, set
in the following sequence.
Be sure to set the port latch to 1 before setting the pin to N-ch open-drain
output.
P9n bit = 1
→
PFC9n bit = 0/1
→
PF9n bit = 1
→
PMC9n bit = 1