joepasquariello
Well-known member
I'm a software person trying to learn more about hardware design. I want to build an adapter to use T41 in place of another processor module. The adapter will have a socket for T41, and it will plug into a socket on an existing application board. The adapter will mostly map T41 pins onto pins of the larger socket, but it would be useful to also be able to add a CAN transceiver or other I/O on the adapter.
My question is how to power the T4.1 via the 3.3V from the application board, which has a 3.3V supply. The module being replaced is 3.3V, and all of the I/O on the application board is 3.3V, including UART, I2C, SPI, digital I/O.
We could take 3.3V from the application board, boost to 5V on the adapter to power T41, but some threads here say it's okay to use the 3.3V pin to power the T41. Is that okay? If we use the boost option, do we create issues by having T41 doing I/O with devices that are powered by a "different" 3.3V on the application board?
This is one thread that seems to say it's okay to power T41 via the 3.3V pin.
https://forum.pjrc.com/threads/5887...l-power-supply?p=226095&viewfull=1#post226095
My question is how to power the T4.1 via the 3.3V from the application board, which has a 3.3V supply. The module being replaced is 3.3V, and all of the I/O on the application board is 3.3V, including UART, I2C, SPI, digital I/O.
We could take 3.3V from the application board, boost to 5V on the adapter to power T41, but some threads here say it's okay to use the 3.3V pin to power the T41. Is that okay? If we use the boost option, do we create issues by having T41 doing I/O with devices that are powered by a "different" 3.3V on the application board?
This is one thread that seems to say it's okay to power T41 via the 3.3V pin.
https://forum.pjrc.com/threads/5887...l-power-supply?p=226095&viewfull=1#post226095