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Diffstat (limited to 'ac97/analog_devices_ad1981a/README')
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diff --git a/ac97/analog_devices_ad1981a/README b/ac97/analog_devices_ad1981a/README new file mode 100644 index 0000000..02e105e --- /dev/null +++ b/ac97/analog_devices_ad1981a/README @@ -0,0 +1,39 @@ +------------------------------------------------------------------------------- +Analog Devices AD1981A: AC'97 data +------------------------------------------------------------------------------- + +This is set of example captures of the AC'97 data on an Analog Devices +AD1981A AC'97 2.2 audio codec. + +Details: +https://en.wikipedia.org/wiki/AC%2797 +https://www.analog.com/en/products/ad1981a.html + + +Logic analyzer setup +-------------------- + +The logic analyzer used was a Saleae Logic16 (at 50/100 MHz): + + Probe AD1981A + ------------------- + 0 BIT_CLK + 1 SDATA_IN + 2 SYNC + 3 RESET# (only in the 50MHz captures) + +SDATA_OUT never toggled, so it was omitted. + + +ac97_ad1981a_powerup1*.sr +------------------------- + +The data is the first chunk of traffic that occurs on an random mainboard +(which contains the AD1981A) during BIOS power-up. + + +ac97_ad1981a_powerup2*.sr +------------------------- + +Same as above, but this is a snippet of the second chunk of data that occurs +a few seconds after the first chunk. |