SPDIF receiver interface (SPDIFRX) RM0390
928/1328 RM0390 Rev 4
Bits 28:16 TLO[12:0]: Threshold LOW (TLO = 1.5 x UI / T
SPDIFRX_CLK
)
This field contains the current threshold LOW estimation. This value can be used to estimate the
sampling rate of the received stream. The accuracy of TLO is limited to a period of the
SPDIFRX_CLK. The sampling rate can be estimated as follow:
Sampling Rate = [2 x TLO x T
SPDIFRX_CLK
+/- T
SPDIFRX_CLK
] x 2/3
Note that TLO is updated by the hardware when SYNCD goes high, and then every frame.
Bits 15:13 Reserved, must be kept at reset value.
Bits 12:0 THI[12:0]: Threshold HIGH (THI = 2.5 x UI / T
SPDIFRX_CLK
)
This field contains the current threshold HIGH estimation. This value can be used to estimate the
sampling rate of the received stream. The accuracy of THI is limited to a period of the
SPDIFRX_CLK. The sampling rate can be estimated as follow:
Sampling Rate = [2 x THI x T
SPDIFRX_CLK
+/- T
SPDIFRX_CLK
] x 2/5
Note that THI is updated by the hardware when SYNCD goes high, and then every frame.
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