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Commit | Line | Data |
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1 | ------------------------------------------------------------------------------- | |
2 | TDM Audio | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is a set of captures of TDM audio. | |
6 | ||
7 | Details: | |
8 | https://hackaday.io/project/2984-teensy-audio-library/log/57537-tdm-support-for-many-channel-audio-io | |
9 | https://www.analog.com/media/en/technical-documentation/technical-articles/MS-2275.pdf | |
10 | ||
11 | ||
12 | Logic analyser setup | |
13 | -------------------- | |
14 | ||
15 | The logic analyser used was a Saleae Logic16 (at 50MHz): | |
16 | ||
17 | Probe TDM Audio | |
18 | --------------------- | |
19 | 3 Bitclk | |
20 | 2 Framesync | |
21 | 1 Data | |
22 | ||
23 | ||
24 | tdm-4ch-16bit-cap1.sr | |
25 | --------------------- | |
26 | ||
27 | 4 channels, 16 bits per sample. | |
28 | Data is set of 0x1100 0x3322 0x5544 0x7766 0x9988 0xbbaa 0xddcc 0xffee. | |
29 | ||
30 | ||
31 | tdm-8ch-16bit-cap1.sr | |
32 | --------------------- | |
33 | ||
34 | 8 channels, 16 bits per sample | |
35 | Data is byte 0x12 repeated. |