Hi, I am investigating a streamlined approach for integration of a Teensy4.1 as a daugther board inside an enclosure, that would also integrate a single board computer (SBC) inside.
Using a Teensy4.1 footprint on the mainboard and then mating the Teensy 4.1 using pin headers is straightforward.
The only remaining issue is to exploit the USB1_OTG data without the use of the micro B usb port.
The SBC has a 9 pin header USB 2.0 port. I will use it since i want to expose all the mainboard connections to the outside of the enclosure.
Having a USB cable, even a flat ribbon one from the T4.1 to the SBC would be awkward as for routing and aesthetics, as it would need to go outside and back on the SBC USB external port.
On the other hand, I could not find any flat ribbon low profile USB cables with micro B usb on one side and pin headers on the other end, that would be adequate for an internal USB cable connection
Which brings me to the idea of using SMD pogo pins, 2.54mm pitch under the USB T4.1 D+ and D- test pins to make the connection to the motherboard traces, and then a pin header 9 pins breakout on the project motherboard, So that I can use a readily available 9pin to 9pin USB cable to connect the project motheboard to the SBC internal USB connector.
The overall connection length would remain as short as possible (10 to 15 cm)
Plus, the T4.1 would be powered through VIN only, and using the D+ and D- test pads would take care of the requirement to cut the tie between VIN and VUSB.
Would it be considered a robust approach mechanically and electrically speaking ?
Using a Teensy4.1 footprint on the mainboard and then mating the Teensy 4.1 using pin headers is straightforward.
The only remaining issue is to exploit the USB1_OTG data without the use of the micro B usb port.
The SBC has a 9 pin header USB 2.0 port. I will use it since i want to expose all the mainboard connections to the outside of the enclosure.
Having a USB cable, even a flat ribbon one from the T4.1 to the SBC would be awkward as for routing and aesthetics, as it would need to go outside and back on the SBC USB external port.
On the other hand, I could not find any flat ribbon low profile USB cables with micro B usb on one side and pin headers on the other end, that would be adequate for an internal USB cable connection
Which brings me to the idea of using SMD pogo pins, 2.54mm pitch under the USB T4.1 D+ and D- test pins to make the connection to the motherboard traces, and then a pin header 9 pins breakout on the project motherboard, So that I can use a readily available 9pin to 9pin USB cable to connect the project motheboard to the SBC internal USB connector.
The overall connection length would remain as short as possible (10 to 15 cm)
Plus, the T4.1 would be powered through VIN only, and using the D+ and D- test pads would take care of the requirement to cut the tie between VIN and VUSB.
Would it be considered a robust approach mechanically and electrically speaking ?
Last edited:
