About oscargomezf

oscargomezf · 2018-06-26

Posted on June 26, 2018 at 11:19Hi everyone,I'm working on an STM32F1 platform. I'm using this crystal ABMM2-8.000MHZ-E2-T for the HSE setting.I made of the calculation according to the application note AN2867:According to the datasheet ABMM2-8.000M...

oscargomezf · 2018-06-26

Posted on June 26, 2018 at 10:03Hi everyone,I'm working on an STM32F1 platform. I have a problem with the LSE crystal. I'm using this one ABS07-120-32.768kHz-T by Abracon. The problem is with temperatures below 5�C. I made some calculations accordin...

oscargomezf · 2015-06-04

Posted on June 04, 2015 at 14:39Hi everyone,I am trying to learn the CMSIS-RTOS RTX. I have experience in FreeRTOS. I am trying to test this example: https://www.keil.com/pack/doc/CMSIS/RTX/html/_example_r_t_x__tutorial.html&sharpRTX_Tutorial_SVCBut...

oscargomezf · 2018-07-03

Posted on July 03, 2018 at 08:03Hi STOne-32,I'm sorry for the delay. I send you all layers seperatly.TOP:L1:L2:Bottom:1. Do you think it is right the design?2. I'm working on a new design based on the STM32L4. I was doing the calculation and it seem...

oscargomezf · 2018-06-28

Posted on June 28, 2018 at 07:55Hi STOne-32,This is the footprint:And the track length:For the 32.768KHz crystal: 6.731 mm and 4.786 mmFor the 8.0MHz crystal: 8.176 mm and 9.874 mmDo you think the PCB design is good enough?Best regards.

oscargomezf · 2018-06-27

Posted on June 27, 2018 at 18:23Hi STOne-32,I tried to place 2 resistors of 10MOmh in series, because I didn't have one of 20 MOhm, but It doesn't work. I was waiting for more than 3 minutes in order to start the oscillation.Do you have any suggesti...

oscargomezf · 2018-06-26

Posted on June 26, 2018 at 11:33Hi AvaTar,You're right. I only want to try to understand If I did all the calculations in a proper way, because I think that the fact to be up to 5ÂºC, it isn't too cold to don't work.

oscargomezf · 2018-06-26

Posted on June 26, 2018 at 10:56Hi waclawek.jan,1. According to: ' It's startup of the LSE oscillator, right? Try to use a longer timeout. It's not unusual for the LSE to start tens of seconds - I wouldn't shy to be use several minutes as timeout.'I...

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