In this section we will explore how to use the Microchip PIC mostly the 16F628A and the 12F683. While the previous was written in C, here I'll use only assembly language. Related YouTube Video:. Why assembly? It's produces fast and efficient coding over C for basic functions related to electronics control. This enables one to really access the powerful features of the PIC. As a RISC processor it has only 35 instructions to learn.
They operate at the register and bit levels. These were developed using MPLAB v8.88. In addition the PIC16F628A has an internal 4 mHz oscillator meaning no need for an external crystal.
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16f628a Projects
The projects concentrate on using the PIC16F628 that has the following features:. 2048 bytes of flash RAM. 224 bytes of data SRAM. 16 programmable IO pins. Three timers two 8-bit and one 16-bit. Pulse width modulation unit.
Pengertian ekonomi bisnis. Operation to 20 mHz And so much more. While 2048 bytes may not sound like much, none of the first seven demos used more than 75 bytes! That includes operating a bipolar stepper motor and reading an external analog to digital converter, which the 16F628 lacks. The 12F683 has ADC, but only six IO pins.
(8 pins total.) PICs utilize the Harvard architecture in which instructions and data operate on separate sources, which simplifies timing and microcircuit design. While they can be programmed in circuit, I used a separate programmer and a ZIP socket in my home built development board. The example demos will use all three timers, pwm unit, interrupts, etc. The idea being to present working debugged code so the novice can learn more on their own.
This is a PIC PROGRAMMER. Using a simple circuit controlled by Serial output, you can insert your source code right into your PIC16F628A. It doesn't need any other IC. The software in your PC will do all the job in sending the information via Serial cable to your PIC's memory. I made the circuit on the protoboard following the layout by Leon Heller. Circuit layout and guidance: software used: Components required: 1 Resistor 10k ohm (R1) 1 Resistor 1k5 ohm (R2) 1 Capacitor 100uF (C2) 1 Capacitor 22uF (C1) 4 Diode 1N4148 (D1,D2,D3,D4) 1 Diode Zener 5V1 (ZD1) 1 Diode Zener 8V2 (ZD2) 2 Transistor BC547 1 IC PIC16F682A (this PIC will receive the data you want) 1 DB9 Female Conector (only the 3, 4, 5, 7, 8 pins are used) No external power supply required.
This is a PIC PROGRAMMER. Using a simple circuit controlled by Serial output, you can insert your source code right into your PIC16F628A. It doesn't need any other IC. The software in your PC will do all the job in sending the information via Serial cable to your PIC's memory. I made the circuit on the protoboard following the layout by Leon Heller.
Circuit layout and guidance: software used: Components required: 1 Resistor 10k ohm (R1) 1 Resistor 1k5 ohm (R2) 1 Capacitor 100uF (C2) 1 Capacitor 22uF (C1) 4 Diode 1N4148 (D1,D2,D3,D4) 1 Diode Zener 5V1 (ZD1) 1 Diode Zener 8V2 (ZD2) 2 Transistor BC547 1 IC PIC16F682A (this PIC will receive the data you want) 1 DB9 Female Conector (only the 3, 4, 5, 7, 8 pins are used) No external power supply required.
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