About sada1400

sada1400 · 2023-10-25

Hi,I am working on a new product. For this I use the STM32H723 µC and the LAN8742Ai PHY from Microchip.Our schematics looks like this:We have a 25 MHz crystal connected to the STM32H723 (HSE). The MCO is configured to HSE. The crystal matches the clo...

sada1400 · 2023-12-11

We have tried other things with the quartz and have come to another discovery. We activated FMC to access an external SRAM. The GPIO speed was set to HIGH. Since we are accessing the SRAM cyclically, we noticed that the crystal was catching interfere...

sada1400 · 2023-11-29

A short feedback. We have found the error. Although the quartz looked good on the oscilloscope, it was due to it. We have replaced it with a more stable oscillator. Now it runs without any problems. Apparently it was so close to the limit that someti...

sada1400 · 2023-11-08

I have checked the crystal. It is within the specification. I don't see any changes when the device cools down. To be sure, I replaced the crystal and tried other types. I have replaced the capacitor and so on. No improvements.My next consideration w...

sada1400 · 2023-10-30

Hi LCE,thank you for your reply! I will check this today :)

sada1400 · 2023-10-30

Hi TDK, thank you for your reply.>> What does this entail exactly? Are you just lowering the temperature? At what point does it fail specifically?Yes, I lower the temperature to -25°C. The first errors start at -16°C. As the temperature is lowered fu...

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STMH723 and LAN8742Ai PHY

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Re: STMH723 and LAN8742Ai PHY

Re: STMH723 and LAN8742Ai PHY