PIC16F819 Microchip Technology Inc., PIC16F819 Datasheet - Page 7

• Manufacturer Part Number: PIC16F819
• Description: 18/20-pin Enhanced Flash Microcontrollers With Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

1.0
This document contains device specific information for
the operation of the PIC16F818/819 devices. Additional
information may be found in the “PICmicro
MCU Family Reference Manual” (DS33023) which may
be downloaded from the Microchip web site. The
Reference Manual should be considered a complemen-
tary document to this data sheet and is highly
recommended reading for a better understanding of the
device architecture and operation of the peripheral
modules.
The PIC16F818/819 belongs to the Mid-Range family
of the PICmicro
other in the amount of Flash program memory, data
memory and data EEPROM (see Table 1-1). A block
diagram of the devices is shown in Figure 1-1. These
devices contain features that are new to the PIC16
product line:
• Internal RC oscillator with eight selectable
• The Timer1 module current consumption has
• The amount of oscillator selections has increased.
 2004 Microchip Technology Inc.
frequencies, including 31.25 kHz, 125 kHz,
250 kHz, 500 kHz, 1 MHz, 2 MHz, 4 MHz and
8 MHz. The INTRC can be configured as the
system clock via the configuration bits. Refer to
Section 4.5 “Internal Oscillator Block” and
Section 12.1 “Configuration Bits” for further
details.
been greatly reduced from 20 A (previous PIC16
devices) to 1.8 A typical (32 kHz at 2V), which is
ideal for real-time clock applications. Refer to
Section 6.0 “Timer0 Module” for further details.
The RC and INTRC modes can be selected with
an I/O pin configured as an I/O or a clock output
(F
with an I/O pin. Refer to Section 4.0 “Oscillator
Configurations” for further details.
OSC
/4). An external clock can be configured
DEVICE OVERVIEW
®
devices. The devices differ from each
®
Mid-Range
TABLE 1-1:
There are 16 I/O pins that are user configurable on a
pin-to-pin basis. Some pins are multiplexed with other
device functions. These functions include:
• External Interrupt
• Change on PORTB Interrupt
• Timer0 Clock Input
• Low-Power Timer1 Clock/Oscillator
• Capture/Compare/PWM
• 10-bit, 5-channel Analog-to-Digital Converter
• SPI/I
• MCLR (RA5) can be configured as an Input
Table 1-2 details the pinout of the devices with
descriptions and details for each pin.
PIC16F818
PIC16F819
Device
2
C
PIC16F818/819
Program
1K x 14
2K x14
Flash
AVAILABLE MEMORY IN
PIC16F818/819 DEVICES
Memory
128 x 8
256 x 8
Data
DS39598E-page 5
EEPROM
128 x 8
256 x 8
Data