PIC16F87/88
TABLE 1-2:
Pin Name
PIC16F87/88 PINOUT DESCRIPTION
PDIP/
SOIC
Pin#
SSOP
Pin#
QFN
Pin#
I/O/P
Type
Buffer
Type
Description
PORTA is a bidirectional I/O port.
RA0/AN0
RA0
AN0
RA1/AN1
RA1
AN1
RA2/AN2/CV
REF
/V
REF
-
RA2
AN2
CV
REF
V
REF
-
(4)
RA3/AN3/V
REF
+/C1OUT
RA3
AN3
V
REF
+
(4)
C1OUT
RA4/AN4/T0CKI/C2OUT
RA4
AN4
(4)
T0CKI
C2OUT
RA5/MCLR/V
PP
RA5
MCLR
V
PP
RA6/OSC2/CLKO
RA6
OSC2
CLKO
17
19
23
I/O
I
TTL
Analog
TTL
Analog
TTL
Analog
Analog
TTL
Analog
Analog
Bidirectional I/O pin.
Analog input channel 0.
Bidirectional I/O pin.
Analog input channel 1.
Bidirectional I/O pin.
Analog input channel 2.
Comparator V
REF
output.
A/D reference voltage (Low) input.
Bidirectional I/O pin.
Analog input channel 3.
A/D reference voltage (High) input.
Comparator 1 output.
Bidirectional I/O pin.
Analog input channel 4.
Clock input to the TMR0 timer/counter.
Comparator 2 output.
Input pin.
Master Clear (Reset). Input/programming voltage
input. This pin is an active low RESET to the device.
Programming voltage input.
Bidirectional I/O pin.
Oscillator crystal output. Connects to crystal or
resonator in Crystal Oscillator mode.
In RC mode, this pin outputs CLKO signal which has
1/4 the frequency of OSC1 and denotes the
instruction cycle rate.
Bidirectional I/O pin.
Oscillator crystal input.
External clock source input.
18
20
24
I/O
I
1
1
26
I/O
I
O
I
2
2
27
I/O
I
I
O
3
3
28
I/O
I
I
O
ST
Analog
ST
4
4
1
I
I
P
ST
ST
–
ST
–
–
15
17
20
I/O
O
O
RA7/OSC1/CLKI
RA7
OSC1
CLKI
Legend:
Note 1:
2:
3:
4:
5:
16
18
21
I/O
I
I
ST
ST/CMOS
(3)
–
I = Input
O
= Output
I/O = Input/Output
P = Power
– = Not used
TTL = TTL Input
ST = Schmitt Trigger Input
This buffer is a Schmitt Trigger input when configured as the external interrupt.
This buffer is a Schmitt Trigger input when used in Serial Programming mode.
This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise.
PIC16F88 devices only.
The CCP1 pin is determined by CCPMX in Configuration Word 1 register.
DS30487B-page 8
Preliminary
2003 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
