19 sample rate ratio (1eh) (read only), 20 c-bit or u-bit data buffer (20h - 37h), Cs8420 – Cirrus Logic CS8420 User Manual
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CS8420
10.19 Sample Rate Ratio (1Eh) (Read Only)
The Sample Rate Ratio is Fso divided by Fsi. This value is represented as an integer and a
fractional part. The value is meaningful only after the both the PLL and SRC have reached lock,
and the SRC output is being used
SRR[7:6
The integer part of the sample rate ratio
SRR[5:0]
The fractional part of the sample rate ratio
10.20 C-Bit or U-Bit Data Buffer (20h - 37h)
Either channel status data buffer E or user data buffer E (provided UBM bits are set to block mode) is ac-
cessible via these register addresses.
10.21 CS8420 I.D. and Version Register (7Fh) (Read Only)
ID[3:0]
ID code for the CS8420. Permanently set to 0001
VER[3:0]
CS8420 Revision Level:
Revision B is coded as 0001
Revision C is coded as 0011
Revision D is coded as 0100
7
6
5
4
3
2
1
0
SRR7
SRR6
SRR5
SRR4
SRR3
SRR2
SRR1
SRR0
7
6
5
4
3
2
1
ID3
ID3
ID2
ID1
ID0
VER3
VER2
VER1
VER0