描述 Description

DEVICE OVERVIEW
This document contains device specific information for the operation of the PIC16F818/819 devices. Additional information may be found in the “PICmicro? Mid-Range MCU Family Reference Manual” (DS33023) which may be downloaded from the Microchip web site. The Reference Manual should be considered a complementary document to this data sheet and is highly recommended reading for a better understanding of the device architecture and operation of the peripheral modulesLow-Power Features:
? Power-Managed modes:
?? - Primary Run: XT, RC oscillator, 87 μA, 1 MHz, 2V
?? - INTRC: 7 μA, 31.25 kHz, 2V
?? - Sleep: 0.2 μA, 2V
? Timer1 oscillator: 1.8 μA, 32 kHz, 2V
? Watchdog Timer: 0.7 μA, 2V
? Wide operating voltage range:
?? - Industrial: 2.0V to 5.5VOscillators:
? Three Crystal modes:
?? - LP, XT, HS: up to 20 MHz
? Two External RC modes
? One External Clock mode:
?? - ECIO: up to 20 MHz
? Internal oscillator block:
?? - 8 user selectable frequencies: 31 kHz, 125 kHz, 250 kHz, 500 kHz, 1 MHz, 2 MHz, 4 MHz, 8 MHz
??
Peripheral Features:
? 16 I/O pins with individual direction control
? High sink/source current: 25 mA
? Timer0: 8-bit timer/counter with 8-bit prescaler
? Timer1: 16-bit timer/counter with prescaler, can be incremented during Sleep via external crystal/clock
? Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler
? Capture, Compare, PWM (CCP) module:
?? - Capture is 16-bit, max. resolution is 12.5 ns
?? - Compare is 16-bit, max. resolution is 200 ns
?? - PWM max. resolution is 10-bit
? 10-bit, 5-channel Analog-to-Digital converter
? Synchronous Serial Port (SSP) with SPI? (Master/Slave) and I2C? (Slave)Special Microcontroller Features:
? 100,000 erase/write cycles Enhanced Flash program memory typical
? 1,000,000 typical erase/write cycles EEPROM data memory typical
? EEPROM Data Retention: 40 years
? In-Circuit Serial ProgrammingTM (ICSPTM) via two pins
? Processor read/write access to program memory
? Low-Voltage Programming
? In-Circuit Debugging via two pins