MCU Model Challenge 1: Guess the manufacturer and model based on the MCU's power pins.

yang_alex

MCU Model Challenge 1: Guess the manufacturer and model based on the MCU's power pins. [Copy link]

 

I got a development board with a SOP20 MCU on it. The manufacturer model has been polished. It can be measured that Pin5 is GND and Pin16 is VCC. Can you guess which MCU it is? It would be even better if you can guess the model.

蓝雨夜

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yang_alex

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cat3902982

Guess the Masked Singer, everyone please ask more questions

蓝雨夜

Is there a reset pin or other special function pin?

yang_alex

The power pin feature of STC is GND on the lower left corner and VCC on the upper right corner. So it should not be STC. GND and VCC are usually close together on the same side. It is the first time I have seen them face to face like the picture above. (I am not very well-informed. )

yang_alex

Blue Rain Night posted on 2020-5-13 09:23 Is there a reset pin, or other special function pins?

There is no reset pin, no external crystal, there is an external I2C clock chip, but I2C can be simulated with GPIO.

The most distinctive feature is the power pins. I have never seen this kind of power pin distribution before.

天天1

This is really hard to guess.

shihuntaotie

I have seen logic devices with similar packages and pin arrangements (I have long forgotten the model ), but I have never seen a microcontroller.

rodge

Pin15 is GND

dcexpert

It looks a bit like a PIC microcontroller, or it may be a domestic microcontroller

hotsauce1861

You... it's too difficult

yang_alex

rodge posted on 2020-5-13 15:52 Pin15 is the GND

Make sure Pin 5 is GND. This pinout is weird.

yang_alex

dcexpert posted on 2020-5-13 15:56 It looks a bit like a PIC microcontroller, or it may be a domestic microcontroller

It doesn't seem to be a PIC microcontroller, but a Microchip SOP20 packaged microcontroller, GND is Pin1, Vcc is Pin 20. It's possible that it's made in China, but I haven't seen it before.

yang_alex

hotsauce1861 posted on 2020-5-13 16:25 You... are too difficult

That’s why it’s called: MCU Model Challenge.

Laspide

A little bit worse, N79E815A/814A/8132A is an enhanced 8-bit 51 microcontroller

yang_alex

Laspide posted on 2020-5-13 17:23 A little worse, N79E815A/814A/8132A is an enhanced 8-bit 51 microcontroller

Your package is not correct! The one in the original post is SOP20 package, and yours is TSSOP20 package. But it is possible for other models of Nuvoton chips.

led2015

This kind of chip guessing activity has been held several times before. It is very difficult. Many chips can only be known by people who have used them.

hjl2832

It is obviously a copycat board. The original poster is not kind. If you have something to say, just say it directly. There is no need to cover it up. The development board of the real manufacturer will not have polished characters. Just think about it, what is the purpose of the manufacturer designing the development board? Promotion... There is no need to be so stingy and polish the characters for fear that others will know and recognize it?

yang_alex

hjl2832 posted on 2020-5-14 09:29 It is obviously a copycat. The host is not honest. If you have something to say, just say it directly. There is no need to cover it up. The development board of the real manufacturer will not be polished. Just imagine that the manufacturer designs the development board...

You take it for granted. I just want to play with this board. If I copy the board, I can directly open the chip package to see the logo on the wafer. Do you still need to copy the board for a 20-pin MCU? Just draw one yourself.