PIC16F819T-E Datasheet, PDF (10/176 Pages) Microchip Technology – 18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology

PIC16F818/819
TABLE 1-2: PIC16F818/819 PINOUT DESCRIPTIONS (CONTINUED)
Pin Name
PDIP/
SOIC
Pin#
SSOP
Pin#
QFN
Pin#
I/O/P
Type
Buffer
Type
Description
PORTB is a bidirectional I/O port. PORTB can be
software programmed for internal weak pull-up on
all inputs.
RB0/INT
RB0
INT
6
7
7
I/O
I
TTL
ST⁽¹⁾
Bidirectional I/O pin.
External interrupt pin.
RB1/SDI/SDA
RB1
SDI
SDA
7
8
8
I/O
TTL
I
ST
I/O
ST
Bidirectional I/O pin.
SPI™ data in.
I²C™ data.
RB2/SDO/CCP1
RB2
SDO
CCP1
8
9
9
I/O
TTL
O
ST
I/O
ST
Bidirectional I/O pin.
SPI data out.
Capture input, Compare output, PWM output.
RB3/CCP1/PGM
RB3
CCP1
PGM
9 10 10
I/O
TTL
I/O
ST
I
ST
Bidirectional I/O pin.
Capture input, Compare output, PWM output.
Low-Voltage ICSP™ Programming enable pin.
RB4/SCK/SCL
RB4
SCK
SCL
10 11 12
I/O
TTL
I/O
ST
I
ST
Bidirectional I/O pin. Interrupt-on-change pin.
Synchronous serial clock input/output for SPI.
Synchronous serial clock input for I²C.
RB5/SS
RB5
SS
11 12 13
I/O
TTL
I
TTL
Bidirectional I/O pin. Interrupt-on-change pin.
Slave select for SPI in Slave mode.
RB6/T1OSO/T1CKI/PGC 12 13 15
RB6
I/O
T1OSO
O
T1CKI
I
PGC
I
TTL
ST
ST
ST⁽²⁾
Interrupt-on-change pin.
Timer1 Oscillator output.
Timer1 clock input.
In-circuit debugger and ICSP programming
clock pin.
RB7/T1OSI/PGD
RB7
T1OSI
PGD
13 14 16
I/O
I
I
TTL
ST
ST⁽²⁾
Interrupt-on-change pin.
Timer1 oscillator input.
In-circuit debugger and ICSP programming
data pin.
VSS
5 5, 6 3, 5 P
–
Ground reference for logic and I/O pins.
VDD
14 15, 16 17, 19 P
–
Positive supply for logic and I/O pins.
Legend: I = Input
– = Not used
O = Output
TTL = TTL Input
I/O = Input/Output
ST = Schmitt Trigger Input
P = Power
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.
3: This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise.
DS39598E-page 8
 2004 Microchip Technology Inc.