I think this is the right part of the forum for this question.
I have been perfecting my code with a stock Teensy 3.5 and now wish to try and take the plunge by moving the design to its own custom board. Before I get down to finalizing the design I have a few questions about component choice and what I could effectively remove from the stock design.
Looking at the schematic posted on the site I would wish to remove the SD card connector, I cannot see an issue with this its just connected to some I/O but the other item I was wondering about was TPD3S014 connected to the USB1 port pins. Is this just protection if you use the device as HID connected to the aux pins? I don't plan to use the device as HID and would just look to program it through the standard USB0 port that the micro usb is wired to so can I safely omit this?
I have read and and understand the requirement around the crystal ground but do you have any recommendations about which crystal to use? I was thinking digikey 490-18285-1-ND fits the requirement of 8pf load and 16mhz, should the crystal case ground be connected to the same ground island as it is sat on and connected to the ground pins nearest to the MK64 chip.
Last question surrounds the bootloader, I know this is proprietary tech and I have to purchase from PJRC but is this correctly connected to an MK64FX512VLQ12 with associate power and caps all that is required to turn it into a functioning teensy.
Any advice surrounding this or other things to avoid are welcome.
I have been perfecting my code with a stock Teensy 3.5 and now wish to try and take the plunge by moving the design to its own custom board. Before I get down to finalizing the design I have a few questions about component choice and what I could effectively remove from the stock design.
Looking at the schematic posted on the site I would wish to remove the SD card connector, I cannot see an issue with this its just connected to some I/O but the other item I was wondering about was TPD3S014 connected to the USB1 port pins. Is this just protection if you use the device as HID connected to the aux pins? I don't plan to use the device as HID and would just look to program it through the standard USB0 port that the micro usb is wired to so can I safely omit this?
I have read and and understand the requirement around the crystal ground but do you have any recommendations about which crystal to use? I was thinking digikey 490-18285-1-ND fits the requirement of 8pf load and 16mhz, should the crystal case ground be connected to the same ground island as it is sat on and connected to the ground pins nearest to the MK64 chip.
Last question surrounds the bootloader, I know this is proprietary tech and I have to purchase from PJRC but is this correctly connected to an MK64FX512VLQ12 with associate power and caps all that is required to turn it into a functioning teensy.
Any advice surrounding this or other things to avoid are welcome.