PIC microcontroller description

　

　

　

PIC Microcontroller :

　

　

History:

The PIC microcontroller was developed by General Instruments in 1975. Although

The PIC controller was used to offload the I/O the tasks from CPU to improve the overall performance of the system.

In 1985, General Instruments converted their Microelectronics Division to Microchip Technology. In 1993, Microchip Technology launched the 8-bit PIC16C84 with EEPROM which could be programmed using serial programming method.　now PIC is improved to use flash ROM .

note: any pic rom which contain f in its name that mean flash rom for example pic16f201.

        PIC types:

       1- 8bit pic microcontroller .

       2-16 bit

       3-32 bit
  The PIC architectures have these advantages:

• Small instruction set to learn
• Built in oscillator with selectable speeds
• Easy entry level, in circuit programming plus in circuit debugging PICKit units available for less than $50.
• RISC architecture
• Inexpensive microcontrollers