LAPIS Semiconductor ML610421, User Manual, Page: 268 / 437

ML610Q421/ML610Q422/ML610421 User’s Manual
Chapter 20 Port 3
20 – 9
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P32MD1, P32MD0 (bit 2)
The P32MD1 and P32MD0 bits are used to select the primary or secondary function of the P32 pin.
P32MD1 P32MD0 Description
0 0 General-purpose input/output mode (initial value)
0 1 Reference resistor connection pin for RC-ADC (channel 0)
1 0 Prohibited
1 1 Prohibited
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P31MD1, P31MD0 (bit 1)
The P31MD1 and P31MD0 bits are used to select the primary or secondary function of the P31 pin.
P31MD1 P31MD0 Description
0 0 General-purpose input/output mode (initial value)
0 1 Reference capacitor connection pin for RC-ADC (channel 0)
1 0 Prohibited
1 1 Prohibited
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P30MD1, P30MD0 (bit 0)
The P30MD1 and P30MD0 bits are used to select the primary or secondary function of the P30 pin.
P30MD1 P30MD0 Description
0 0 General-purpose input/output mode (initial value)
0 1 RC oscillation waveform input pin for RC-ADC (channel 0)
1 0 Prohibited
1 1 Prohibited
Note:
If any bit combination out of the above is set to “Prohibited” and the corresponding bit of the port 3 is sepecified to
output mode (selected in port3 control register), status of corresponding pin is fixed, regardless the contents of Port3
register (P3D)
High-impedance output mode: High-impedance
P-channel open drain output mode: High-impedance
N-channel open drain output mode: Fixed to “L”
CMOS output mode: High-impedance: Fixed to “L”
When using RC-ADC as the secondary function, specify each pin be “High-impedance input” even the RC oscillation
monitor pin. Pull-up or Pull-down input makes drawing the current.