review of home security systems
The PIC has an overall of 40 pins. These pins include input/output ports
such as PORTA, PORTB, PORTC, PORTD, PORTE and two Vdd ports for input voltage. The PIC architecture is characterized by its multiple attributes:Separate code and data spaces Harvard architecture. A small number of fixed length instructions. Most instructions are single cycle
execution, with one delay cycle on branches and skips. All RAM locations function as registers as both source and destination of math and other functions.