RFPIC12F675K Datasheet, PDF (22/136 Pages) Microchip Technology – 20-Pin FLASH-Based 8-Bit CMOS Microcontroller with UHF ASK/FSK Transmitter

rfPIC12F675
3.3 Pin Descriptions and Diagrams
Each GPIO pin is multiplexed with other functions. The
pins and their combined functions are briefly described
here. For specific information about individual functions
such as the comparator or the A/D, refer to the
appropriate section in this Data Sheet.
3.3.1 GP0/AN0/CIN+
Figure 3-1 shows the diagram for this pin. The GP0 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input for the A/D
• an analog input to the comparator
3.3.2 GP1/AN1/CIN-/VREF
Figure 3-1 shows the diagram for this pin. The GP1 pin
is configurable to function as one of the following:
• as a general purpose I/O
• an analog input for the A/D
• an analog input to the comparator
• a voltage reference input for the A/D
FIGURE 3-1:
Data Bus
DQ
WR
WPU
CK _Q
RD
WPU
BLOCK DIAGRAM OF GP0
AND GP1 PINS
Analog
Input Mode
VDD
Weak
GPPU
WR
PORT
DQ
CK _Q
WR
TRISIO
DQ
CK _Q
RD
TRISIO
RD
PORT
WR
IOC
DQ
CK _Q
RD
IOC
Interrupt-on-Change
VDD
I/O pin
VSS
Analog
Input Mode
QD
EN
QD
EN
RD PORT
To Comparator
To A/D Converter
DS70091A-page 20
Preliminary
 2003 Microchip Technology Inc.