The physical program memory space of the device, which is 2K for the AT89C2051. This should be the responsibil- ity of the software programmer.

AT89C2051_programmer Python & Arduino-based AT89C2051 programmer Software requirements • Python3 with pip • Arduino IDE Hardware requirements • Aruino UNO board • Optocoupler (strongly recommend MOSFET-pair output) • 12V nominal power supply (actual voltage required ~13.5V) • (recommended) ZIF socket The schematic is included as schematic/schematic.pdf. Flashing the programmer • Open AT89_prog/AT89_prog.ino in Arduino IDE • Flash onto the Arduino board Installing the programmer software • (recommended) Create a python virtualenv • python3 -m venv venv •.

Venv/bin/activate • Install from PyPI pip install at89overlord Programming • Place chip in socket • Connect the Arduino board to the computer • Connect the 12V power supply • On the computer run at89overlord -f PATH_TO_INTEL_HEX_FILE Other functionality Run at89overlord -h for the full list of commands and flags Upgrading from an older version • Check for changes in the schematic • Reflash the Arduino board • Reinstall the programming software Running on Windows It should be possible to use this programmer on Windows. • Install cygwin with python3 and pip • When running the at89overlord append -p COMn to the arguments list, where n is the number of Arduino board's serial port.

Hi people, I have two pieces of AT89C2051 which I would like to put somewhere (timer or something) but I don't have programmer for that mcu. In further, I don't want to spent big money on bying or building programmer for it. But looking for workaround. As far as I can see, software for Arduino (at the moment I have Arduino UNO R3) has 'Parallel programming' option, which is only option to program mcu like AT89C2051. Problem is that AT89C requires 12V for programming and Arduino does not has this. Has anyone tried to use Arduino for programming such mcu like AT89 and if it possible how to do that?

How to pump-up that signal level and what else is needed.? Hi people, I have two pieces of AT89C2051 which I would like to put somewhere (timer or something) but I don't have programmer for that mcu. In further, I don't want to spent big money on bying or building programmer for it. But looking for workaround. As far as I can see, software for Arduino (at the moment I have Arduino UNO R3) has 'Parallel programming' option, which is only option to program mcu like AT89C2051. Problem is that AT89C requires 12V for programming and Arduino does not has this. Has anyone tried to use Arduino for programming such mcu like AT89 and if it possible how to do that?

How to pump-up that signal level and what else is needed.? Knut Yes, it is possible. AFAIk there is no such work done.

It takes too much time and effort for a beginner. If you have enough time and try to learn some thing, you can try it out. Yes, it is possible. AFAIk there is no such work done.

It takes too much time and effort for a beginner. If you have enough time and try to learn some thing, you can try it out.

Just one question - if I understand well this programmer from above link (@santoshaxl) and looking of datasheet of AT89C2051 - this mcu requires 12V only on RST pin, other pins work on HIGH/LOW level of maximum 5V!? The idea is just this - to mix above programmer and Arudiono board. I assume, I can remove above AT89C from programmer and use Arduino instead. After that problem is programming software. Am I correct? Castle zagyg upper works cost.