Chapter 7
I/O Port
VII - 18 Control Registers
7.2.5 Port n N-ch Open-drain Control Registers
PnODC is the register to control N-ch open-drain control of I/O.
Port 0 N-ch Open-drain Control Register (P0ODC: 0x03F50)
Port 1 N-ch Open-drain Control Register (P1ODC: 0x03F51)
bp 76543210
Bit name P0ODC7 - P0ODC5-4 - - - -
At reset00000000
AccessR/WRR/WR/WRRRR
bp Bit name Description
7 P0ODC7
N-ch open-drain output selection
0: Push-pull output
1: N-ch open-drain output
6 - Always read as 0.
5-4 P0ODC5-4
N-ch open-drain output selection
0: Push-pull output
1: N-ch open-drain output
3-0 -
Always read as 0.
bp 76543210
Bit name--P1ODC5-----
At reset00000000
AccessRRR/WRRRRR
bp Bit name Description
7-6 - Always read as 0.
5 P0ODC5
N-ch open-drain output selection
0: Push-pull output
1: N-ch open-drain output
4-0 -
Always read as 0.