MC81F4104 Datasheet, PDF (54/118 Pages) Finechips – ABOV SEMICONDUCTOR

MC81F4104
R0CONM – R03~04
R0 PORT CONTROL MIDDLE REGISTER
00C7H
When programming the port, please remember that any alternative peripheral I/O function that
defined by the R0CONM register must also be enabled in the associated peripheral module.
R0CONM
7
6
5
4
3
2
1
0
R04
-
-
-
R03
Reset value:
R/W R/W R/W R/W R/W R/W R/W R/W
000-_--00b
R04
R04/AN4/PWM2O/T2O/EXT0
–
bit4 – bit2
R03
R03/RESETB ( *note* )
000: Schmitt trigger input mode (EXT0)
001: Output mode, open-drain
010: Alternative function (AN4)
011: Alternative function (PWM2O/T2O)
1xx: Output mode, push-pull
Not used for MC81F4104
00: Schmitt trigger input mode
01: Output mode, open-drain
10: Not available
11: Not available
Note :
If you want to use RESETB, the LVREN (ROM OPTION [7]) must select to LVR disable
mode („1‟). If you want to use R35, the LVREN (ROM OPTION [7]) must select to LVR
enable mode („0‟).
Even you are in case of using emulator you must select the ROM OPTION switch properly to
use those R03 ports.
54
October 19, 2009 Ver.1.35