Atmel AVR and 8051 series ISP programmer

Posted on Feb 7, 2014

This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices. The programming interface is compatible to STK200 ISP programmer hardware so the users of STK200 can also use the software which can program both the 8051 and AVR series devices. Figure 1 shows the circuit diagram

Atmel AVR and 8051 series ISP programmer
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of the in-system programmer interface, the power to the interface is provided by the target system. The 74HCT541 ic isolate and buffer the parallel port signals. It is necessary to use the HCT type ic in order to make sure the programmer should work with 3v type parallel port. Figure 2 shows the circuit diagram of the stand-alone spi programmer, the power to the interface is provided by the PC USB port which can supply a max of 100mA current. Get a cheap USB cable, cut the cable other end connector and attach a crimp shell connector to this end, red wire is 5v and black is 0v. This programmer circuit can be use to program the 89S series devices and the AVR series devices which are pin compatible to 8051, like 90S8515. For other AVR series devices the user can make an adapter board for 20, 28 and 40 pin devices. The pin numbers shown in brackets correspond to PC parallel port connector. The ISP-3v0. zip file contains the main program and the i/o port driver for windows 2000 & XP. Place all files in the same folder, for win-95/98 use the "ISP-Pgm3v0. exe" file, for win-2000 & XP use the "ISP-XP. bat" file. The main screen view of the program is shown in figure 3. Also make sure do not program the RSTDISBL fuse in ATmega8, ATtiny26 and ATtiny2313 otherwise further spi programming is disable and you will need a parallel programmer to enable the spi programming. For the fuses setting consult the datasheet of the respective...

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