Analog Comparators
AC0AN0(AC0A Comparator)
AC0AN1(AC0A Comparator)
AC0BP0(AC0A Comparator)
AC1AN0(AC1A Comparator)
AC1AN1(AC1A Comparator)
AC1BP0(AC1A Comparator)
AC0BN0(AC0B Comparator)
AC0BN1(AC0B Comparator)
AC1BN0(AC1B Comparator)
AC1BN1(AC1B Comparator)
Pins
PA22
PA27
PA23
PA13
PA07
PA14
PA21
PA29
PA15
PA09
These Yb lines are the negative input pins of the analog comparator.To use the library, the below
table shows the lines which are externally grounded for Proper Qmatrix operation
Positive Input Pins of the Four
Analog Comparators
AC0AP0(AC0A Comparator)
AC0BP1(AC0B Comparator)
AC1AP0(AC1A Comparator)
AC1BP1(AC1B Comparator)
Port A
Pins
PA20
PA28
PA12
PA08
If only one comparator is used , then the corresponding pin of that comparator is properly
externally grounded.Above table shows the Analog comparator usage and the corresponding
lines which needs to be grounded.
The Port pin configurability is provided in the library to select any port for Ya or X lines.The
Port for Yb lines is fixed which is PORTA as these lines are inputs of the Analog comparators
which are fixed pins of PORTA.
X,YA,YB,SMP
Ports on UC3C
Configurations
X
YA
YB
PORTA
Yes
Yes
Yes(only few
PORTB
Yes
Yes
No
PORTC
Yes
Yes
No
PORTD
Yes
Yes
No
pins of PortA
can be
configured as
Yb Lines)
SMP
Yes
Yes
Yes
Yes
65
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