640 PDM Correlator
640 : PDM Correlator
- Author: Armaan Gomes
- Description: A chip that performs either cross or auto correlatiion on PDM microphone inputs
- GitHub repository
- Clock: 0 Hz
How it works
It performs an XOR on two input bitstreams and sums the result. The lower this value is the higher correlation. Explain how your project works
How to test
Connect microphones to pins and stuff Explain how to use your project
External hardware
Micrrophones,clockgenerator, spi port List external hardware used in your project (e.g. PMOD, LED display, etc), if any
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | Bit Clock (3.072 Mhz) | PCM Out Mic 0 | Delay Select 0 |
| 1 | LR Clock (48Khz) | PCM Out Mic 1 | Delay Select 1 |
| 2 | PDM Input Mics 0,1 | PCM Out Mic 2 | Delay Select 2 |
| 3 | PDM Input Mics 2,3 | PCM Out Mic 3 | Delay Select 3 |
| 4 | PDM Input Mics 4,5 | PCM Out Mic 4 | Delay Select 4 |
| 5 | PDM Input Mics 6,7 | PCM Out Mic 5 | Beamformed PCM Output |
| 6 | PCM Out Mic 6 | Mic Clock | |
| 7 | PCM Out Mic 7 |