CS42518 Datasheet, PDF (55/91 Pages) Cirrus Logic – 110 dB, 192 kHz 8-Ch Codec with S/PDIF Receiver

CS42518
6.8 OMCK/PLL_CLK Ratio (address 07h) (Read Only)
7
RATIO7(2¹)
6
RATIO6(2⁰)
5
RATIO5(2^-1)
4
RATIO4(2^-2)
3
RATIO3(2^-3)
2
RATIO2(2^-4)
1
RATIO1(2^-5)
0
RATIO0(2^-6)
6.8.1 OMCK/PLL_CLK RATIO (RATIOX)
Default = xxxxxxxx
Function:
This register allows the user to find the exact absolute frequency of the recovered MCLK coming from
the PLL. This value is represented as an integer (RATIO7:6) and a fractional (RATIO5:0) part. For
example, an OMCK/PLL_CLK ratio of 1.5 would be displayed as 60h.
6.9 RVCR Status (address 08h) (Read Only)
7
Digital Silence
6
AES Format2
5
AES Format1
4
AES Format0
3
Active_CLK
2
RVCR_CLK2
1
RVCR_CLK1
0
RVCR_CLK0
6.9.1 DIGITAL SILENCE DETECTION (DIGITAL SILENCE)
Default = x
0 - Digital Silence not detected
1 - Digital Silence detected
Function:
The CS42518 will auto-detect a digital silence condition when 1548 consecutive zeros have been de-
tected.
6.9.2 AES FORMAT DETECTION (AES FORMATX)
Default = xxx
Function:
The CS42518 will auto-detect the AES format of the incoming S/PDIF stream and display the infor-
mation according to the following table.
AES
Format2
0
0
0
0
1
1
1
1
AES
Format1
0
0
1
1
0
0
1
1
AES
Format0
0
1
0
1
0
1
0
1
Linear PCM
DTS-CD
DTS-LD
HDCD
IEC 61937
Reserved
Reserved
Reserved
Description
Table 13. AES Format Detection
DS584PP5
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