Hello,
I have recently been trying to design a custom Teensy board for my project. I've been basing it off of the Teensy 3.2 schematics, but I have a bunch of (possibly dumb) questions.
First, why was a voltage regulator added to the teensy 3.2? It seems like the MK20DX256VLH7 already had a usb voltage regulator pin (VREGIN), and that was what was used on the teensy 3.1. Second, why are the three VDD and the VOUT33 pins all connected together in the schematic?
While looking for more info on the schematics, I found this thread. A little ways down, a user named Constantin replied with an attached image of a schematic displaying how to get the MK20 (from their eagle cad library) working. In the image, they connected the VCC pins, the VOUT33, but also the VREGIN. Is this intentional, or could it be a mistake? (I presume this is where I am expected to hook up the usb power if I were to use this schematic.)
Lastly, (probably the worst question lol,) what are the 2 rectangles at the top left of the schematic..........?
This is probably longer than it needs to be..
Thanks for any help!
I have recently been trying to design a custom Teensy board for my project. I've been basing it off of the Teensy 3.2 schematics, but I have a bunch of (possibly dumb) questions.
First, why was a voltage regulator added to the teensy 3.2? It seems like the MK20DX256VLH7 already had a usb voltage regulator pin (VREGIN), and that was what was used on the teensy 3.1. Second, why are the three VDD and the VOUT33 pins all connected together in the schematic?
While looking for more info on the schematics, I found this thread. A little ways down, a user named Constantin replied with an attached image of a schematic displaying how to get the MK20 (from their eagle cad library) working. In the image, they connected the VCC pins, the VOUT33, but also the VREGIN. Is this intentional, or could it be a mistake? (I presume this is where I am expected to hook up the usb power if I were to use this schematic.)
Lastly, (probably the worst question lol,) what are the 2 rectangles at the top left of the schematic..........?
This is probably longer than it needs to be..
Thanks for any help!