Sometimes when we need to program an avr microcontroller on ISP (In System Programming ) we need a “ data cable “ ( In system programmer cable ) to transfer the compiled data to microcontroller .

This transfer of data (read or write ) can be done with many types of programming cable , but the easiest mode to program an avr chip with ISP ( like Atmega32 ) is to use a In system programmer cable like in schematic presented here .

For this avr In system programmer cable we need just : one Mother parallel port connector (DB25) ,one single in line 5 pins mother connector four 220 ohms resistors ,  5 wire cable

The configuration for this isp programming cable is: