Datasheet
2012 Microchip Technology Inc. Preliminary DS41652A-page 11
PIC16F527
TABLE 3-2: PIC16F527 PINOUT DESCRIPTION
Name Function Input Type Output Type Description
RA0/AN0/C1IN+/ICSPDAT RA0 TTL CMOS Bidirectional I/O pin. It can be software
programmed for internal weak pull-up and
wake-up from Sleep on pin change.
ICSPDAT ST CMOS ICSP™ mode Schmitt Trigger.
C1IN+ AN — Comparator 1 input.
AN0 AN — ADC channel input.
RA1/AN1/C1IN-/CV
REF/
ICSPCLK
RA1 TTL CMOS Bidirectional I/O pin. It can be software
programmed for internal weak pull-up and
wake-up from Sleep on pin change.
ICSPCLK ST — ICSP™ mode Schmitt Trigger.
C1IN- AN — Comparator 1 input.
CV
REF — AN Programmable Voltage Reference output.
AN1 AN — ADC channel input.
RA2/AN2/C1OUT/T0CKI RA2 TTL CMOS Bidirectional I/O port.
C1OUT — CMOS Comparator 1 output.
AN2 AN — ADC channel input.
T0CKI ST — Timer0 Schmitt Trigger input pin.
RA3/MCLR
/VPP RA3 TTL — Standard TTL input with weak pull-up.
MCLR
ST — Master Clear (Reset). When configured as
MCLR
, this pin is an active-low Reset to the
device. Voltage on MCLR
/VPP must not
exceed V
DD during normal device operation or
the device will enter Programming mode.
Weak pull-up is always on if configured as
MCLR
.
V
PP HV — Test mode high-voltage pin.
RA4/AN3/OSC2/CLKOUT RA4 TTL CMOS Bidirectional I/O pin. It can be software
programmed for internal weak pull-up and
wake-up from Sleep on pin change.
OSC2 — XTAL Oscillator crystal output. Connections to crystal
or resonator in Crystal Oscillator mode (XT, HS
and LP modes only, PORTB in other modes).
CLKOUT — CMOS EXTRC/INTRC CLKOUT pin (F
OSC/4).
AN3 AN — ADC channel input.
RA5/OSC1/CLKIN RA5 TTL CMOS Bidirectional I/O port.
OSC1 XTAL — XTAL oscillator input pin.
CLKIN ST — EXTRC Schmitt Trigger input.
RB4/OP2- RB4 TTL CMOS Bidirectional I/O port.
OP2- AN — Op amp 2 inverting input.
RB5/OP2+ RB5 TTL CMOS Bidirectional I/O port.
OP2+ AN — Op amp 2 non-inverting input.
RB6 RB6 TTL CMOS Bidirectional I/O port.
RB7 RB7 TTL CMOS Bidirectional I/O port.
RC0/AN4/C2IN+ RC0 ST CMOS Bidirectional I/O port.
AN4 AN — ADC channel input.
C2IN+ AN — Comparator 2 input.
Legend: I = Input, O = Output, I/O = Input/Output, P = Power, — = Not Used, TTL = TTL input, ST = Schmitt Trigger input,
HV = High Voltage, AN = Analog Voltage