Novasom M7 Hardware User Manual
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Contents
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NOVAsomM7 Hardware User ManualN.M7-250518-HUM-M7-V1.2 Page 19 of 25www.novasomindustries.comEurope | Asia | Americacard is in the slot, thus allowing the boot process to read the boot loader from the uSD slot.If the card is not found when the power is applied the boot process will look in eMMC chip ( if present ) fora valid boot loader code, but remember that the presence of the qSPI chip depends on the NOVAsom M7board configuration.6.4 : Connections to J9J9 sports a lot of signals, and most of them are connected at the processor level without buffering orprotection.Although the processor is quite protected on over and under voltages, care should be taken in order toavoid to stress the processor outside the recommended operating conditions, or permanent damages willresult on the processor itself.It’s quite common to overtake a ringing digital signal that stresses the processor outside the recommendedoperating conditions, so if you are in doubt use dump series resistors in the order of 1 KΩ for input signals.In the table 2 the signals are named as the standard DTB factory functions, and the colored functions arethe functions provided by the standard DTB factory functions.You can find all the information on how to change a pin function visiting thewww.novasomindustries.com page in the NOVAsom M7 dedicated section, where you can find a lot ofapplication notes and already developed tools and examples.6.5 : Connecting an external battery to the NOVAsom M7 boardThe connector J12 is minded to connect a 3.7V external battery.The external battery will be used on systems that need to be powered by an external battery.On the other hand, the battery can be of a rechargeable type ( LiIon or Lithium coin cell ) and will becharged with 450 mA from the 5V supply.Care should be taken to connect the correct battery ( a 3.7V battery is requested, higher voltages willimmediately destroy your NOVAsom M7 board ) and connect the battery in the correct way, where the pin1 of J2 is the positive and the pin 2 is the negative. A power inversion can permanently damage the batteryor, worst, damage your NOVAsom M7 board. |
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