14-12-2012, 06:48 PM
STUDY OF PIC MICROCONTROLLER
[attachment=43861]
AIM:
To study the architecture of PIC16F887 microcontroller and mikroC pro compiler software.
DESCRIPTION:
There are four devices in PIC16F8X family. They are (1) PIC16F873 (2) PIC16F84 (3) PIC16F86 (4) PIC16F877. The PIC16F876/873 devices come in 28 pin packages and PIC16F877/874 devices come in 40 pin packages. The parallel slave port is not implemented on the 28 pin devices.
PIC microcontroller is RISC processor and use Harvard Architecture. This is different than INTEL 8051 and most of the general purpose processors use Von Neumann Architecture. Harvard Architecture is a newer concept and came out of the requirement to speed up the processor. This has two different effects. The first one is that the data and address bus are separated allowing increased data flow to and from the CPU. Secondly there can be different widths of these buses. There are only 35 PIC instructions which is easier for the programmer to remember by practice.
The functions supported by PIC devices include analog to digital converter(ADC) function built in power on reset and brown out reset features. Watch dog timer is a simple timer circuit which looks after the continuous functionality of the system with respect to time.
HIGH-PERFORMANCE RISC CPU:
Only 35 Instructions to Learn:
All single-cycle instructions except branches
Operating Speed:
DC – 20MHz oscillator/clock input
DC – 200ns instruction cycle
Interrupt Capability
8-level Deep Hardware Stack
Direct, Indirect and Relative Addressing modes.
[attachment=43861]
AIM:
To study the architecture of PIC16F887 microcontroller and mikroC pro compiler software.
DESCRIPTION:
There are four devices in PIC16F8X family. They are (1) PIC16F873 (2) PIC16F84 (3) PIC16F86 (4) PIC16F877. The PIC16F876/873 devices come in 28 pin packages and PIC16F877/874 devices come in 40 pin packages. The parallel slave port is not implemented on the 28 pin devices.
PIC microcontroller is RISC processor and use Harvard Architecture. This is different than INTEL 8051 and most of the general purpose processors use Von Neumann Architecture. Harvard Architecture is a newer concept and came out of the requirement to speed up the processor. This has two different effects. The first one is that the data and address bus are separated allowing increased data flow to and from the CPU. Secondly there can be different widths of these buses. There are only 35 PIC instructions which is easier for the programmer to remember by practice.
The functions supported by PIC devices include analog to digital converter(ADC) function built in power on reset and brown out reset features. Watch dog timer is a simple timer circuit which looks after the continuous functionality of the system with respect to time.
HIGH-PERFORMANCE RISC CPU:
Only 35 Instructions to Learn:
All single-cycle instructions except branches
Operating Speed:
DC – 20MHz oscillator/clock input
DC – 200ns instruction cycle
Interrupt Capability
8-level Deep Hardware Stack
Direct, Indirect and Relative Addressing modes.