About AJ_1

AJ_1 · 2024-09-23

Hello,I'm planning to use an STM32WL5X microcontroller in an upcoming project, and I found myself confused on the recommended impedance for external 32MHz oscillators. Please see the attached image for a screenshot from the datasheet.The datasheet sa...

AJ_1 · 2024-09-23

Hi All,When dealing with RF transmitters, it's common advice to always put a load on a transmitter before turning it on, because running it with no load can break it. I'm curious if that applies to STM32WL microcontrollers as well. If I transmitted a...

AJ_1 · 2024-09-23

Hello,If I have a design where I am not using the RF pins, is there a recommended way to terminate them? Can you just ground them all?Thanks

AJ_1 · 2024-08-04

Hello,I have been developing a program on the NUCLEO-WL55JC1 development board, and I found a bug in the IRTIM module. The reference manual says that, when enabled, the IRTIM module will NAND the outputs of TIM16 and TIM17 and output the signal on a ...

AJ_1 · 2024-05-14

On the STM32WL55 MCUs, is it possible to have the ADC interrupt go only to the Cortex-M0+(CPU2)? I have a situation where I would like to trigger CPU2 with interrupts from the ADC, but I don't want to trigger the ADC interrupt for CPU1. Is this pos...

AJ_1 · 2024-10-21

Hi @STTwo-32,In my design, I am only using the low-power transmitter. Since I don't need the high-power transmitter, I'm planning to leave that pin open and disconnected. If the microcontroller code accidentally transmits using RFO_HP instead of RFO_...

AJ_1 · 2024-09-25

Hi Leah,I don't know if you'll get a response from an official ST employee, but in case you don't, I wanted to pass along my knowledge.If you have no need to ever transmit, the TX pins don't need to be connected. Section 29.3.7 of the reference manua...

AJ_1 · 2024-09-24

The datasheet shows the resistor and capacitor in series with the HSE32 input pin. But when I simulate that circuit with a 0.8V amplitude AC source, there's only 366mV on the OSC_IN pin at 32MHz.

AJ_1 · 2024-05-23

Hi @STTwo-32,When I said "I figured out how to fix the code in the initial reply.", I meant it as "I figured out how to format the code properly in the initial reply". When I initially pasted my code, it formatted incorrectly and I could not figure o...

AJ_1 · 2024-04-19

Hi STTwo-32,Okay, I started a new thread here, feel free to check it out.Thank you for answering my initial question

User statistics

User Activity

STM32WL: TCXO series impedance calculation

STM32WL: Can you damage the microcontroller by transmitting without a load?

How to terminate unused RF pins

STM32WL5x: Undocumented Bug in IRTIM Module

STM32WL55: interrupting CPU2

Re: STM32WL: Can you damage the microcontroller by transmitting without a load?

Re: Matching network for antenna design for STM32WL33

Re: STM32WL: TCXO series impedance calculation

Re: Weird behavior when breaking in an interrupt

Re: Can someone explain the function of SX_FREQ_TO_CHANNEL?