Cirrus Logic CS4382 - Manual (Page 21)

DS514F2 21
CS4382
Selects the appropriate digital filter to maintain the standard 15 ms/50 ms digital de-emphasis filter re-
sponse at 32, 44.1 or 48 kHz sample rates. (see
Figure 39 )
De-emphasis is only available in Single-Speed Mode.
4.4.3 Soft Ramp-Down Before Filter Mode Change (RMP_DN)
Default = 0
0 - Disabled
1 - Enabled
Function:
A mute will be performed prior to executing a filter mode change. When this feature is enabled, this mute
is effected, similar to attenuation changes, by the Soft and Zero Cross bits in the Mode Control 3 register.
When disabled, an immediate mute is performed prior to executing a filter mode change.
Note: For best results, it is recommended that this feature be used in conjunction with the RMP_UP bit.
4.5 Invert Control (Address 05h)
4.5.1 Invert Signal Polarity (INV_XX)
Default = 0
0 - Disabled
1 - Enabled
Function:
When enabled, these bits will invert the signal polarity of their respective channels.
4.6 Mixing Control Pair 1 (Channels A1 & B1)(Address 06h)
Mixing Control Pair 2 (Channels A2 & B2)(Address 09h)
Mixing Control Pair 3 (Channels A3 & B3)(Address 0Ch)
Mixing Control Pair 4 (Channels A4 & B4)(Address 0Fh)
4.6.1 Channel A Volume = Channel B Volume (A=B)
Default = 0
0 - Disabled
1 - Enabled
Function:
The AOUTAx and AOUTBx volume levels are independently controlled by the A and the B Channel Vol-
ume Control Bytes when this function is disabled. The volume on both AOUTAx and AOUTBx are deter-
mined by the A Channel Attenuation and Volume Control Bytes (per A-B pair), and the B Channel Bytes
are ignored when this function is enabled.
7 6 5 4 3 2 1 0
INV_B4 INV_A4 INV_B3 INV_A3 INV_B2 INV_A2 INV_B1 INV_A1
0 0 0 0 0 0 0 0
7 6 5 4 3 2 1 0
Px_A=B PxATAPI4 PxATAPI3 PxATAPI2 PxATAPI1 PxATAPI0 PxFM1 PxFM0
0 0 1 0 0 1 0 0