IP PortfolioAnalog and mixed-signalaudio
of_ams_pdm_mic_iface
PDM microphone decimator
Maturity simulatedTargets FPGA + ASICDifficulty EasyPriority 1
CIC and half-band decimation chain that converts one or two PDM microphone bitstreams to PCM samples.
Simulated. The RTL is lint clean and passes its self-checking testbench against a reference model in simulation. It has not been run on an FPGA board or in silicon.
Interfaces
| Port | Direction | Kind | Width | Notes |
|---|---|---|---|---|
| ctrl | in/out | APB control bus | 32 | Control and status registers, including ID, VERSION and STATUS |
| irq | out | interrupt | 1 | Interrupt request |
| pdm | in | serial | 1 | |
| pdm_clk | out | clock | 1 | |
| pcm | out | AXI4-Stream | 24 |
Standards
No external standard applies.
More in audio
| ID | Block | Maturity |
|---|---|---|
| of_ams_classd | Class-D audio amplifier | planned |
| of_ams_hp_driver | Headphone driver | planned |
| of_ams_audio_codec_afe | Audio codec analog front end | planned |