I'm designing a special purpose carrier for a Teensy Micromod. I've been poring over the Micromod schematic, and I want to make sure I haven't missed something. Can someone check me on these?
I can power the Micromod via the 3.3V pins from the carrier board without special considerations. The D2/D3/D4 circuit ensures that VDD_SNVS_IN will be powered first, as is required by the MIMXRT part, and is configured so 3.3V, VUSB, & VBATT won't backfeed into one another.
USB_VIN on the micromod can connect directly to the 5V pin on a USB programming connector on the carrier. Unlike a regular Teensy, USB_VIN does not power 3.3V internally to the Micromod. It only powers the USB LDOs internal to the IMXRT, and VDD_SNVS_IN.
The GPIO/28/3.3V_EN pin is just Pin 28 GPIO and doesn't actually do anything to 3.3V.
Is this all correct?
Thanks?
I can power the Micromod via the 3.3V pins from the carrier board without special considerations. The D2/D3/D4 circuit ensures that VDD_SNVS_IN will be powered first, as is required by the MIMXRT part, and is configured so 3.3V, VUSB, & VBATT won't backfeed into one another.
USB_VIN on the micromod can connect directly to the 5V pin on a USB programming connector on the carrier. Unlike a regular Teensy, USB_VIN does not power 3.3V internally to the Micromod. It only powers the USB LDOs internal to the IMXRT, and VDD_SNVS_IN.
The GPIO/28/3.3V_EN pin is just Pin 28 GPIO and doesn't actually do anything to 3.3V.
Is this all correct?
Thanks?