projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 6d9897ba UH |
1 | ------------------------------------------------------------------------------- |
| 2 | Analog Devices AD1981A: AC'97 data | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is set of example captures of the AC'97 data on an Analog Devices | |
| 6 | AD1981A AC'97 2.2 audio codec. | |
| 7 | ||
| 8 | Details: | |
| 9 | https://en.wikipedia.org/wiki/AC%2797 | |
| 10 | https://www.analog.com/en/products/ad1981a.html | |
| 11 | ||
| 12 | ||
| 13 | Logic analyzer setup | |
| 14 | -------------------- | |
| 15 | ||
| 16 | The logic analyzer used was a Saleae Logic16 (at 50/100 MHz): | |
| 17 | ||
| 18 | Probe AD1981A | |
| 19 | ------------------- | |
| 20 | 0 BIT_CLK | |
| 21 | 1 SDATA_IN | |
| 22 | 2 SYNC | |
| 23 | 3 RESET# (only in the 50MHz captures) | |
| 24 | ||
| 25 | SDATA_OUT never toggled, so it was omitted. | |
| 26 | ||
| 27 | ||
| 28 | ac97_ad1981a_powerup1*.sr | |
| 29 | ------------------------- | |
| 30 | ||
| 31 | The data is the first chunk of traffic that occurs on an random mainboard | |
| 32 | (which contains the AD1981A) during BIOS power-up. | |
| 33 | ||
| 34 | ||
| 35 | ac97_ad1981a_powerup2*.sr | |
| 36 | ------------------------- | |
| 37 | ||
| 38 | Same as above, but this is a snippet of the second chunk of data that occurs | |
| 39 | a few seconds after the first chunk. |