Cirrus Logic CS4384 - Manual (Page 42)

42 DS620F1
CS4384
Function:
Auto mute polarity detect (00)
See Section 4.11 on page 28 for the description.
Active low mute polarity (10)
When RST is low the outputs are high impedance and will need to be biased active. Once reset has been
released and after this bit is set, the MUTEC output pins will be active low polarity.
Active high mute polarity (11)
At reset time the outputs are high impedance and will need to be biased active. Once reset has been re-
leased and after this bit is set, the MUTEC output pins will be active high polarity.
6.9 Mute Control (Address 09h)
6.9.1 Mute (MUTE_xx)
Default = 0
0 - Disabled
1 - Enabled
Function:
The Digital-to-Analog converter output will mute when enabled. The quiescent voltage on the output will
be retained. The muting function is affected, similarly to attenuation changes, by the Soft and Zero Cross
bits. The MUTE pins will go active during the mute period according to the MUTEC bit.
6.10 Mixing Control (Address 0Ah, 0Dh, 10h, 13h)
6.10.1 De-Emphasis Control (PX_DEM1:0)
Default = 00
00 - Disabled
01 - 44.1 kHz
10 - 48 kHz
11 - 32 kHz
Function:
Selects the appropriate digital filter to maintain the standard 15
µs/50 µs digital de-emphasis filter re-
sponse at 32, 44.1 or 48 kHz sample rates. ( Figure 20 on page 25 )
De-emphasis is only available in Single-Speed Mode.
7 6 5 4 3 2 1 0
MUTE_B4 MUTE_A4 MUTE_B3 MUTE_A3 MUTE_B2 MUTE_A2 MUTE_B1 MUTE_A1
0 0 0 0 0 0 0 0
7 6 5 4 3 2 1 0
Reserved Px_DEM1 Px_DEM0 PxATAPI4 PxATAPI3 PxATAPI2 PxATAPI1 PxATAPI0
0 0 0 0 1 0 0 1