MC81F4204
April 24, 2012 Ver.1.41 71
R1CONL – R10~11
R1 PORT CONTROL LOW REGISTER 00D5H
A reset clears the R1CONL register to ‘00H’, makes R11-R10 pins input mode. You can use R1CONL
register setting to select input or output mode (open-drain or push-pull) and enable alternative
functions.
When programming the port, please remember that any alternative peripheral I/O function that
defined by the R1CONL register must also be enabled in the associated peripheral module.
7 6 5 4 3 2 1 0
R1CONL
–
– – R11 R10 Reset value: 00H
– – – R/W R/W R/W R/W R/W
– bit7 – bit5 Not used for MC81F4204
000: Schmitt trigger input mode (EXT7)
001: Output mode, open-drain
010: Alternative function (AN6)
011: Alternative function (PWM2O)
R11
R11/AN6/EXT7/PWM2O
1xx: Output mode, push-pull
00: Schmitt trigger input mode (EXT6)
01: Output mode, open-drain
10: Alternative function (Vref)
R10
R10/Vref/EXT6
11: Output mode, push-pull
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