Cirrus-logic CS8420 Manuel d'utilisateur télécharger pdf (Page 47)

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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

76543210

SRR7 SRR6 SRR5 SRR4 SRR3 SRR2 SRR1 SRR0

7654321ID3

ID3 ID2 ID1 ID0 VER3 VER2 VER1 VER0

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Cirrus-logic CS8420 Manuel d'utilisateur Page 47