[LASMO] External clocks, and XLR architectures

For the two processors STM32F7 and the STM32F1, we need to use externals clocks. Indeed, for the STM32f7, the processor can use a 16MHz internal clocks, but in order to have the best performance STM32F7 can provide, we will add an external clock of 26 MHz. We will do the same for the STM32F1, but with an external clock of 16 MHz.

Also, we will use two XLR connections in order to have a sound signal wich the animation will be synchronize with. After find out about XLR connection and signals, I understood that a connector XLR has 3 pins, carry at 24 V, and receive two symetrics signals but out-of-phase. So, we have to desymetrize the sygnal. To this end, we will use an instrumentation amplifier: 


2 Replies to “[LASMO] External clocks, and XLR architectures”

    1. According to the datasheet, we can use an external clock between 4 and 26 MHz for the STM32F7 in order to generate an internal frequency of 216 MHz. We can use a 26 MHz external clock but finaly, after talking with Alexis, I anderstood that using a 8MHz external clock is better because of the consumption.

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