Hello!

Using the datasheets for the atsamd21 and with some datasheets for the mpu9150 and USBC i put together my first schematic (half completed). Have I missed anything or is there something wrong with this design? Can’t figure out what to do with the VLOGIC port on the MPU.

 

Just a quick look. Why is there a GND on the VDDANA?



Always check the pin number to layout on possible pinout-incompatible variants of the same device.

 

Isn’t the VDDANA supposed to be connected to GNDANA through the decoupling capacitors? Thanks! how about VLOGIC on the mpu?

 

The spec sheet states 'VDD = 2.375V-3.465V, VLOGIC= 1.8V±5% or VDD"
That appears to be a Kicad7 schematic, if taking it further to board production, you will need power flags also.
And any unconnected pins flagged.

 

Added some power flags to wherever it says it wasn’t driven. Ignore the unclosed circuits, but otherwise should this be fine?

 

Isn’t the VDDANA supposed to be connected to GNDANA through the decoupling capacitors? Thanks! how about VLOGIC on the mpu?

Look at your pin 5 and 6 on the controller and my power supply image to see what should be connected to what and how.

For VLOGIC
https://cdn.sparkfun.com/datasheets/Sensors/IMU/mpu-9150_breakout.pdf

 

Look at your pin 5 and 6 on the controller and my power supply image to see what should be connected to what and how.

For VLOGIC
https://cdn.sparkfun.com/datasheets/Sensors/IMU/mpu-9150_breakout.pdf

Thanks. Why are the SDA and SCL pins connected to VCC and what is SJ? Solder junction?

 

BTW, you can show a power flag once for all occurrences.

 

Thanks. Why are the SDA and SCL pins connected to VCC and what is SJ? Solder junction?

Those are just standard pull-up resistor connections. Yes, it's a solder junction to select GND or VCC on the address pin.


Example on a PCB.

 

Those are just standard pull-up resistor connections. Yes, it's a solder junction to select GND or VCC on the address pin.

View attachment 302869
Example on a PCB.

Thanks! Figured it out. How about the USB schematics? Are those okay?

 

This is what i’ve made so far. Do let me know whether its okay now. I followed a schematic for a breakout board (https://cdn.sparkfun.com/datasheets/Sensors/IMU/mpu-9150_breakout.pdf) for the atsamd21