First connection

Interface by using Visual Basic6 program

RS232 connection

PIC 16F877 General using circuit

Reset circuit
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Oscillator circuit
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PIC16F877 Pin Diagram

PIC16F877 Microcontroller

Parameter Name	Value
Program Memory Type	Enhanced Flash
Program Memory Size (Kbytes)	14
RAM (bytes)	368
Data EEPROM (bytes)	256
I/O	33
Packages	40 pin/PDIP

• This powerful (200 nanosecond instruction execution) yet easy-to-program (only 35 single word instructions) CMOS FLASH-based 8-bit microcontroller packs Microchip's powerful PIC® architecture into an 40 package and is upwards compatible with the PIC16C5X, PIC12CXXX and PIC16C7X devices.

• PIC16F877 features 256 bytes of EEPROM data memory, self programming, an ICD, 8 channels of 10-bit Analog-to-Digital (A/D) converter, 2 additional timers, 2 capture/compare/PWM functions, the synchronous serial port can be configured as either 3-wire Serial Peripheral Interface (SPI™) or the 2-wire Inter-Integrated Circuit (I²C™) bus and a Universal Asynchronous Receiver Transmitter (USART). All of these features make it ideal for more advanced level A/D applications in automotive, industrial, appliances and consumer applications.

How to interface?