looking for a microccontroller for a pcb project can anyone help??

[ElectroNex]

im looking for an stm32 chip that can do 3 i2C connections, usb-c, 3 UART, 65 I/O's minimum and a 512kb program storage size, has to be suitable for new designs and smd

[isometrik]

https://www.st.com/en/development-tools/st-mcu-finder-pc.html
or
https://www.st.com/en/development-tools/stm32-finder.html?icmp=tt15133_gl_pron_apr2020

[voltsandjolts]

Beware, this poster has previously started a very similar thread which got 6 replies, but OP didn't respond at all.
https://www.eevblog.com/forum/beginners/what-microcontroller-should-i-use-365315/msg4709534/#msg4709534
Prepare to be stonewalled if posting here

[Doctorandus_P]

I recommend you buy a stm32 chip with at least 3 i2C connections, usb-c, 3 UART, 65 I/O's minimum and a 512kb program storage size, and suitable for new designs and smd

Also, what does "USB-C" have to do with your uC? It's just a mechanical connector, and it is supposed to be used with many different signalling protocols.

[liaifat85]

I think you can choose  STM32F767. It has 4 I2C interfaces and 4 UARTS, 512KB SRAM. No. of I/O pin is also matching with what you want: https://www.st.com/resource/en/datasheet/stm32f765bi.pdf

You can make multi-channel data loggers like this with STM32F4 MCUs:

https://www.pcbway.com/project/shareproject/10_channel_NTC_thermistor_based_temperature_logger_b1c5cdfe.html

If you use STM32F767 in such projects, it can more advanced.

[Microdoser]

Beware, this poster has previously started a very similar thread which got 6 replies, but OP didn't respond at all.
https://www.eevblog.com/forum/beginners/what-microcontroller-should-i-use-365315/msg4709534/#msg4709534
Prepare to be stonewalled if posting here

And they are only on their second post too

[Infraviolet]

That huge number of IO pins could always be done using GPIO expander chips, or something like a shift register of the relevant type if you know certain pins will always be acting onlyas outputs or inputs.

The i2c bus count could always be done by bit-banging software I2C on some pairs of pins, depending on your chips' clock rate the speed might not be as high as built-in I2C peripherals could be, but for many devices this slower speed won't be a problem. Same goes for UART if necessary.