Robomart AT89sXX USB Programmer

AT89sXX USB programmer is an in-circuit programmer for Atmel AVR controllers. The programmer uses a firmware-only USB driver; no special USB controller is needed. USBASP is a very useful programmer for AVR microcontrollers. Though originally this programmer was made to program only AVR microcontrollers, the firmware of this programmer can be modified to program AT89Sxx chips.The huge benefit of this modified programmer is that it works both for AVR and AT89Sxx chips and AVR and being a USB based programmer it can be used both with desktop and with laptops. The original code of the USBasp was modified by some Chinese and put up. All have done is compiled the scattered information at one place for people to use and build this useful programmer. It is complete solution for programming popular AT89sXX series of micro controllers with ease. This is a USB based programmer. Many new computers and almost all laptops doesn't have a serial or parallel port, so hobbyist face a lot of problems because all easy to make programmers are either serial or parallel port based. Moreover, it is faster than those programmers so programming big MCUs is now a whole lot of fun. It can be used with Low Cost 8051 development board for quick and economical startup with AVR micros.6 pins from USBASP (MOSI, MISO, SCK, RST, Gnd, Vcc) go to corresponding pins of AT89Sxx chip. Features of USBASP Programmer:-? Works under multiple platforms. Linux, Mac OS X and Windows are tested.? No special controllers or smd components are needed.? Programming speed is up to 5kBytes/sec.? SCK option to support targets with low clock speed (< 1,5MHz).? Planned: serial interface to target (e.g. for debugging).