BTheadset
Electrical
- Aug 2, 2009
- 1
I'm designing a wireless audio device. I would like to use a micro USB connector so that I can charge the battery (VBUS, GND pins) and provide access to the DSP programming pins (D+,D-,ID pins).
The programming will be done using a proprietary programmer (bit-bashed, not using USB protocol). I don't want to add a USB-UART bridge to the design because of cost.
The maximum acceptable voltage for the DSP programming pins is 2V - so can anyone suggest a compact (i.e. minimal component count), cheap, voltage clamp (circuit) that may be applicable in this design?
Thanks
The programming will be done using a proprietary programmer (bit-bashed, not using USB protocol). I don't want to add a USB-UART bridge to the design because of cost.
The maximum acceptable voltage for the DSP programming pins is 2V - so can anyone suggest a compact (i.e. minimal component count), cheap, voltage clamp (circuit) that may be applicable in this design?
Thanks