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Find one with the same series part you have 12C and start there.

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Downloading a program is similar to the Arduino process with several exceptions. Realistically, you need at least one more original “flasher” board for testing and experimentation. Here’s an “english” datasheet for a similar chip: If it 12c202ad, the bootloader process is invoked, otherwise it jumps to the user program.

The other difference is that isolation diodes are required in the rx and tx lines of the serial adapter to prevent parasitic powering of the processor which would prevent the power cycle required to dahasheet the bootloader.


STC provides demo code for using the timers, serial, PWM and ADC subsections, it’s up to you to make what you need which means you will be writing almost everything you need, from scratch.

If you don’t know thestart here: Upon wake up, the processor waits for a certain time for a serial character to appear on a predefined com port. I guarantee you the journey will be long. Hi got a flasher, I removed the case to see what’s inside. I’ve worked extensively with the STC chips and while they are decent, reliable and cheap, there is zero library support compared to Arduino.

(PDF) STC12C2052AD Datasheet download

Rather than issuing a reset to enter the bootloader code, you toggle VCC. They have had two websites in the past, sometimes it can be a challenge to find what you’re looking for. I have found adapter boards with cable jacks to be easier to deal with 12c2052ae I can use standard cables rather than the extension cable that would be required for the plug on the front of the cp board. You’ll need a logic analyzer to figure out what display driver you have.


If you’re fluent in Mandarin Chinese, there is considerably more support and code sharing since the product is sponsored by the Chinese government. This requirement is well documented in the datasheets as previously mentioned. Another starting resource is Github. If you’re someone who gives up easily, don’t start.

There are tons of STC “development 12c2052sd on Aliexpress. Outside of the domestic Chinese market there is zero, zip, nada support.

You can compile C based programs for the device with SDCC public domain and download with a serial device, these days that means a USB to serial converter plus a switch and some diodes which is well documented in the STC literature.

Is it possible to use arduino to program this chip?