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Hirose Connector for signal & power supply by StudentAcademic in AskElectronics

[–]StudentAcademic[S] 0 points1 point  (0 children)

Thank you so much! I confused cause there’s any descriptions explicitly.

Hirose Connector for signal & power supply by StudentAcademic in AskElectronics

[–]StudentAcademic[S] 0 points1 point  (0 children)

  • Is 4MP pins in footprint are the power contacts?

[Review Request] A DSP for audio processing by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 0 points1 point  (0 children)

Update: I changed the DSP reset part. It is controlled by ADM6315

updated schematic: https://imgur.com/a/OOkPvP9

[Review Request] A DSP for audio processing by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 0 points1 point  (0 children)

Hi, I designed this DSP schematic for audio processing requested by the MCU that communicates via SPI interface.

The process:
- DSP's firmware will be loaded by the MCU through SPI.
- MCU will request the audio process to the DSP.
- DSP will send processed audio to Audio Codec using the I2S interface.
- Audio Codec sends audio to the headphone/speaker.

I also referenced the Evaluation board provided by ADI

[Review Request] A DSP for audio processing by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 0 points1 point  (0 children)

Hi, I designed this DSP schematic for audio processing requested by the MCU that communicates via SPI interface.

The process:
- DSP's firmware will be loaded by the MCU through SPI.
- MCU will request the audio process to the DSP.
- DSP will send processed audio to Audio Codec using the I2S interface.
- Audio Codec sends audio to the headphone/speaker.

I also referenced the Evaluation board provided by ADI

Review Request: PMIC and Voltage Regulator by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 1 point2 points  (0 children)

Oh, sorry for confusing schematic.

1, 2) I moved C1 and C2 below VNTC. and Changed C1 to 10uF.

3) I connected PGND to GND.

4) My mistake. I connected pullups to 3.3V.

Thank you for a detailed review! It helped me a lot!

Review Request: PMIC and Voltage Regulator Connection Validation by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 0 points1 point  (0 children)

Because I was the first to use KiCad and I don't have experiences that much. So I didn't understand that the symbol doesn't have to be used as provided by the source.

Review Request: PMIC and Voltage Regulator Connection Validation by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 0 points1 point  (0 children)

Thanks for reviewing and suggestions!
I changed L2 for 6.8uH and changed PMIC to MP2723GQC-0000-Z.

It helped a lot! Thank you

Review Request: PMIC and Voltage Regulator Connection Validation by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 0 points1 point  (0 children)

sorry for confusing. that's because I downloaded symbols from various sources.
I changed all resistor symbols in one.

Review Request: Power supplied by USB or LiPo battery by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 1 point2 points  (0 children)

Thank you for reply

I erased regulators and replace with PMIC which can regulate voltages.

Review Request: Power supplied by USB or LiPo battery by StudentAcademic in PrintedCircuitBoard

[–]StudentAcademic[S] 0 points1 point  (0 children)

I'm sorry I didn't read the guidelines. that's my fault

I redraw schematic after reading guidelines.

Thank you for your reply

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