PIC18F2221 MICROCHIP [Microchip Technology], PIC18F2221 Datasheet - Page 14

• Manufacturer Part Number: PIC18F2221
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F4321 FAMILY
TABLE 1-2:
DS39689E-page 12
MCLR/V
OSC1/CLKI/RA7
OSC2/CLKO/RA6
Legend: TTL = TTL compatible input
Note 1:
MCLR
V
RE3
OSC1
CLKI
RA7
OSC2
CLKO
RA6
PP
2:
Pin Name
PP
ST = Schmitt Trigger input with CMOS levels
I
Default assignment for CCP2 when Configuration bit, CCP2MX, is set.
Alternate assignment for CCP2 when Configuration bit, CCP2MX, is cleared.
/RE3
2
C = ST with I
PIC18F2221/2321 PINOUT I/O DESCRIPTIONS
SPDIP,
SOIC,
SSOP
Pin Number
2
C™ or SMB levels
10
1
9
QFN
26
6
7
Type
Pin
I/O
I/O
O
O
P
I
I
I
I
Analog
Analog
Buffer
Type
TTL
TTL
ST
ST
—
—
Preliminary
Master Clear (input) or programming voltage (input).
Oscillator crystal or external clock input.
Oscillator crystal or clock output.
Master Clear (Reset) input. This pin is an active-low
Reset to the device.
Programming voltage input.
Digital input.
Oscillator crystal input or external clock source input.
ST buffer when configured in RC mode; CMOS otherwise.
External clock source input. Always associated with
pin function OSC1. (See related OSC1/CLKI,
OSC2/CLKO pins.)
General purpose I/O pin.
Oscillator crystal output. Connects to crystal or resonator
in Crystal Oscillator mode.
In RC, EC and INTIO modes, OSC2 pin outputs CLKO
which has one-fourth the frequency of OSC1 and denotes
the instruction cycle rate.
General purpose I/O pin.
CMOS = CMOS compatible input or output
I
O
= Input
= Output
Description
© 2007 Microchip Technology Inc.
P = Power