2016-08-10 07:51 AM
On the 64-pin STM32F401RCT6 there are two USARTs:
2016-08-10 08:48 AM
I'd assume only USART1 PA9/PA10 would be viable, and design accordingly.
You can use whatever USART and pins for your own application implementation2016-08-10 10:37 AM
Thanks for the reply.
Yes, we have planned for that. It just seemed more likely to me that it was a failure to update documentation from the 100 pin package to the 64 pin package rather than an obtuse decision to limit the number of boot options in the 64-pin package.Maybe we will build with some test points to verify that USART is truly not available for serial boot loader.2016-08-10 12:28 PM
I think it is more a function of having one ROM Boot loader for the die regardless of what package it ends up in. You pick a lower pin count package, your escape options diminish.
I'd go with the premise that it functions as documented, and PA2/PA3 isn't an option.2017-02-17 12:41 AM
Hi,
Can somebody explain what this line means?
''The USART2 uses its remapped pins.''
I'm using STM32L151CCU6 which doesn't have PD6/7. The bootloader isn't ack'ing when PA2/PA3 is used. Shouldn't the PA2/PA3 be the ''remapped pins'' for this case?