PIC16F688 Datasheet, PDF (43/174 Pages) Microchip Technology – 14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

4.3.3 RC2/AN6
The RC2 is configurable to function as one of the
following:
• a general purpose I/O
• an analog input for the A/D Converter
4.3.4 RC3/AN7
The RC3 is configurable to function as one of the
following:
• a general purpose I/O
• an analog input for the A/D Converter
FIGURE 4-8:
Data Bus
BLOCK DIAGRAM OF RC2
AND RC3
WR
PORTC
DQ
CK _Q
WR
TRISC
DQ
CK _Q
RD
TRISC
Analog Input
Mode⁽¹⁾
RD
PORTC
To A/D Converter
VDD
I/O Pin
VSS
Note 1: Analog Input mode comes from ANSEL.
PIC16F688
4.3.5 RC4/C2OUT/TX/CK
The RC4 is configurable to function as one of the
following:
• a general purpose I/O
• a digital output from the comparator
• a digital I/O for the EUSART
FIGURE 4-9:
BLOCK DIAGRAM OF RC4
USART Select⁽¹⁾
C2OUT EN
EUSART
TX/CLKOUT ₀
Data Bus
0
C2OUT 1
1
DQ
WR
PORTC
CK _Q
WR
TRISC
DQ
CK _Q
RD
TRISC
RD
PORTC
To EUSART CLK Input
VDD
I/O Pin
VSS
Note 1: USART Select signals selects between port
data and peripheral output.
 2004 Microchip Technology Inc.
Preliminary
DS41203B-page 41