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pic without the programmer?

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asic1984

asic1984

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hi all

may be this is a strange question ...................... 8O

is it possible to program pic or avr without using programmer hardware

i heared that there are some programs that do that ...........is this true?

and what are these programs and how they work

thanks for help
 

Salam,

Did you mean without any hardware , just direct link from the serial port or parallel port to the mcu !!!!!

Of course NO you can't

becuse in the case of the PIC or AVR you need at least RS232 <--> TTL converter (two transistor min. with few resistors )

There are bootloader that receive a hex code from serial port and update the mcu code but you also need a simple serial interface too

Bye
 

Yes you're right .. mafacturers have embedded a IN CIRCUIT PROGRAMMING interface .. that allows with a simple cable to progarm those chips .. the AVR accept ISP and JTAG programmers .latest microchip also have a similar interface .. See the manufacturers app notes and also consult the chip data sheet to see what is recomended
Most manufacturers will give the schematic of the cable .so you can make it. As a matter i have a colection of cables for all kinds of cpus ..
most cables work with the PARALLEL PORT/LPT1

Cheer
 

Salam eltonjohn,

The prgramming cable is not pure cable but it contain small serial\parallel interface hardware.

Asic1984

you can make your cable for program AT89S and AVR

**broken link removed**

Bye
 

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