The Microchip PIC series 8bit CMOS FLASH MCU has 4 KB flash memory, 192B RAM, 22 I/O ports and 28 pins. It's operating frequency is 20MHz DC and operating temperature ranges between -40°C to +125°C (Extended).

Only 35 single word instructions to learn
All single cycle instructions except for program branches which are two-cycle
Eight level deep hardware stack
Direct, Indirect and Relative Addressing modes
Power-on Reset (POR)
Power-up Timer (PWRT) and oscillator start-up timer (OST)
Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation
Programmable code protection
Power saving SLEEP mode