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Upon wake up, the processor waits for a certain time for a serial character to appear on a predefined com port. 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 12c052ad, from scratch.

If it does, the bootloader process is invoked, otherwise it jumps to the user program.

Realistically, you need at least one more original “flasher” board for testing and experimentation. Downloading a program is similar to the Arduino process with several exceptions.


If you’re someone who gives up easily, don’t start. 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. ratasheet

STC 12C5A16AD programming with arduino

This requirement is well documented in the datasheets as previously mentioned. If you’re fluent in Mandarin Chinese, there is considerably more support and code sharing since the product is sponsored by the Chinese government.

They have had two websites in the past, sometimes it can be a challenge to find 12f2052ad you’re looking for. There are tons of STC “development boards” on Aliexpress.

You’ll need a logic analyzer to figure out what display driver you have. I’ve worked extensively with the STC chips and while they are decent, reliable and cheap, there is zero library support compared to Arduino.

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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. Hi got a flasher, I removed the case to see what’s inside.


Is it possible to use arduino to program this chip? 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.

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Rather than issuing a reset to enter the bootloader code, you toggle VCC. Outside of the domestic Chinese market there is zero, zip, nada support.

Another starting resource is Github. If you don’t know thestart here: I guarantee you the journey will be long. Here’s an “english” datasheet for a similar chip: Find one with the same series part you have 12C and start there.