CS42435-CMZ Cirrus Logic Inc, CS42435-CMZ Datasheet - Page 30

• Manufacturer Part Number: CS42435-CMZ
• Description: IC,Soundcard Circuits,CMOS,QFP,52PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

30
5.3.3
5.3.4
5.3.3.1
DAC Volume Control and Mute are not accessible in Hardware Mode.
5.3.3.2
Digital Volume Control
Each DAC’s output level is controlled via the Volume Control registers operating over the range of 0 to
-127.5 dB attenuation with 0.5 dB resolution. See
page
trolled by the SZC[1:0] bits in the Digital Volume Control register. See
on page
Each output can be independently muted via mute control bits in the register
dress 07h)” on page
maximum value (-127.5 dB). When the AOUTx_MUTE bit is disabled, the corresponding DAC returns to
the attenuation level set in the Volume Control register. The attenuation is ramped up and down at the
rate specified by the SZC[1:0] bits.
De-Emphasis Filter
The CS42435 includes on-chip digital de-emphasis optimized for a sample rate of 44.1 kHz. The filter re-
sponse is shown in
that utilize 50/15 μs pre-emphasis equalization as a means of noise reduction.
De-emphasis is only available in Single-Speed Mode. Please see
(DAC_DEM)” on page 42
45. Volume control changes are programmable to ramp in increments of 0.125 dB at the rate con-
43.
5.0 V
Hardware Mode
Software Mode
VA
Figure
44. When enabled, each AOUTx_MUTE bit attenuates the corresponding DAC to its
AOUTx+
AOUTx-
for de-emphasis control.
12. The de-emphasis feature is included to accommodate audio recordings
Figure 11. Full-Scale Output
(AOUTx+) - (AOUTx-) = 6.5 V
Full-Scale Differential Output Level =
“AOUTX Volume Control (Addresses 08h- 0Fh)” on
PP
= 2.3 V
RMS
“Transition Control (Address 06h)”
2.5 V
2.5 V
4.125 V
0.875 V
4.125 V
0.875 V
“DAC De-Emphasis Control
“DAC Channel Mute (Ad-
CS42435
DS685F2