PIC16F819 (8-Bit Microcontrollers)

20 MHz Max. CPU Speed
35 Instructions
8 Level Hardware Stack
8 MHz Internal Oscillator – Selectable Frequencies 8 MHz to 31 kHz
16 I/O Pins
Power-On Reset (POR)
Brown-Out Reset (BOR)
Power-Up Timer (PWRT)
Oscillator Start-Up Timer (OST)
Watchdog Timer (WDT)
In-Circuit Serial Programming (ICSP)
In-Circuit Debug (ICD)

Peripherals

5 Channel 10-bit Analogue-to-Digital Converter (ADC)
Capture, Compare, PWM (CCP) Module
Two 8-bit Timers
One 16-bit Timer
Synchronous Serial Port (SSP) with SPI and I2C