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I have found adapter boards with cable jacks to be easier to deal with so I can use standard cables rather than the extension cable that would be required for the plug on the front of the cp board.

Rather than issuing a reset to enter the bootloader code, you toggle VCC. Downloading a program is similar to the Arduino process with several exceptions. If you’re someone who gives up easily, don’t start.

12CAD pdf Datasheet P1 Part Num IC-ON-LINE

Is it possible to use arduino to program this chip? They have had datashet websites in the past, sometimes it can be a challenge to find what you’re looking for.


Realistically, you need at least one more original “flasher” board for testing and experimentation. You’ll need a logic analyzer to figure out what display driver you have.

(PDF) STC12C2052AD Datasheet download

Hi got a flasher, I removed the case to see what’s inside. This requirement is well documented in the datasheets as previously mentioned. Upon wake up, the processor waits for a certain time for a serial character to appear on a predefined com port. 1c2052ad guarantee you the journey will be long.

STC 12C5A16AD programming with arduino

If you don’t know thestart here: If it does, the bootloader process is invoked, otherwise it jumps to the user program. There are tons of STC “development boards” on Aliexpress.

Here’s an “english” datasheet for a similar chip: 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. Find one with the same series part you have 12C and start there. Outside of the domestic Chinese market there is zero, zip, nada support.


If you’re fluent in Mandarin Chinese, there is considerably more support and code sharing since the product is sponsored by the Chinese government. 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.

Another starting resource is Github. 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 enter the bootloader. I’ve worked extensively with the STC chips and while they are decent, reliable and cheap, there 12c2502ad zero library support compared to Arduino.