TI E2E Community
Digital Signal Processors (DSP)
C5000 Ultra Low Power DSP
C5000 Ultra Low Power DSP Forum
C5535 EZDSP powering stereo mic
I have been following this thread because Ive had trouble powering a "stereo" microphone. I have made the required changes in the code to power mic using the suggestions on the wiki page... and I am only able to power half of the microphone, if that makes any sense. the microphone I am using is actually two different microphones that tie into a single TRS connector... each microphone is tied to a respective channel (left or right). The reason I am working with this microphone is because a two microphone array is required for my project and the C5535 ezdsp does not have two input jacks.
As far as the on-chip hardware is concerned, I noticed that only ONE channel is powered at all times with the default voltage is 1.25V. I looked at the schematics and it looks like IN2_L (of the codec) is the only line being powered via MICBIAS. Is the only way to power IN2_R to tie it to IN2_L? If this is the case... this might be an issue because the R&L signals would mix. Any knowledge of this issue?Sincerely,Jef
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