Arduino for STM32

there are also clock generator chips for this sort of things. TI, OnSemi, and SI for example.

you may also look into PIC32 chips that has very sophisticated REFO modules.

a few suggestions. 1. using invertors is a good way. you want to use non-schmitt / non-bufferred gates. most people recommend single input single gate but I prefer nand gates myself - the other input can be used as on/off switch. 2. you may look into dividers as well - hc4060 for example. easy way t...

I know that I can dump them correctly if I write A0-11 first and then immediately A12

I would say that you found your solution already.

1. you do NOT need to write to two different ports at the same time;
2. you do need to write to numerous pins *sufficiently* fast.

For my use-case (writing addresses to an Atari 2600 cartridge), writing to the BSRR registers of the two ports in immediate sequence may not be fast enough.

maybe you should first explore if that assumption is correct - i find it hard to believe.

Is there an easy way to synchronize writes to GPIOs on two different ports so they happen at the same time? unless in some highly-specialized cases, the answer is no. two ways that I can think of: 1. you can use timer output compares to output up to 4 pin states. those OC pins can be on different p...

that pricing makes more sense.

seems to come down to HSE vs. LSE: if you need HSE, pick 002a; and if you need LSE, pick 002b.

for tssop20 only.

The 002b seemed like a G0 competitor. Sacrificing osc32_out for osc_out is t a good tradoff.

And at 50c/1, it isn't price competitive vs the G0, and definitely not vs the 002a part..

PY32 got it right I think.

an unscientific comparison of the PY32 vs. G030: https://dannyelectronics.wordpress.com/ ... stm32g030/

I think the PY32 is hard to beat for its value proposition.

stm makes a led1642 - 16 channel pwm generator. probably a mcu in its heart.

TI has an almost identical part as well. in tssop packaging so more user friendly.

I wonder if there are dedicated pwm chips that you can use for something like this.

wonder no more - the first return from google suggests LT8500: 48-channels, 12-bit resolution, spi interface, ...