Which programmer are you using?
This programmer is based on Thomas Fischl's USBasp design and connects to your computer's USB port. Not only is it quite compact, but the design is really elegent. The USB interface is achieved by using an atmega processor and the rest is done in firmware. For those interested, the firmware source code can be downloaded from the USBasp website.
Some of the features include:
* Support for AVRDude from version 5.2 onwards
* Allows you to to read or write the microcontroller EEPROM, firmware, fuse bits and lock bits
* Support for Linux, Mac OS X and Windows (will work on vista)
* 5 KB/sec maximum write speed
* Software controlled SCK option to support targets with low clock speed (< 1.5MHz)
* 10 pin ISP interface
These programmers are a perfect companion to the Protostack 28 pin AVR Development Board or the Protostack ATMEGA8 Development Kit.
Supported microcontrollers include:
ATmega8 ATmega48 ATmega88 ATmega168 ATmega328
ATmega103 ATmega128 ATmega1280 ATmega1281 ATmega16
ATmega161 ATmega162 ATmega163 ATmega164 ATmega169
ATmega2560 ATmega2561 ATmega32 ATmega324 ATmega329
ATmega3290 ATmega64 ATmega640 ATmega644 ATmega649
ATmega6490 ATmega8515 ATmega8535
ATtiny12 ATtiny13 ATtiny15 ATtiny25 ATtiny26
ATtiny45 ATtiny85 ATtiny2313
AT90S1200 AT90S2313 AT90S2333 AT90S2343 AT90S4414
AT90S4433 AT90S4434 AT90S8515