CS4272-DZZ View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS4272-DZZ

24-Bit, 192 kHz Stereo Audio CODEC

Cirrus Logic 

CS4272

itored and implemented for each channel. See Table 14 on page 41.

Soft Ramp and Zero Cross Enable

Soft Ramp and Zero Cross Enable dictate that signal level changes, either by attenuation changes or

muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB level

change will occur after a time-out period between 512 and 1024 sample periods (10.7 ms to 21.3 ms

at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is

independently monitored and implemented for each channel. See Table 14 on page 41.

Table 14. Soft Cross or Zero Cross Mode Selection

Soft

ZeroCross

Mode

0

0

Changes to affect immediately

0

1

Zero Cross enabled

1

0

Soft Ramp enabled (default)

1

1

Soft Ramp and Zero Cross enabled

8.3.3 ATAPI Channel Mixing and Muting (Bits 3:0)

Function:

The CS4272 implements the channel mixing functions of the ATAPI CD-ROM specification. See

Table 15 on page 42

Left Channel

Audio Data

A Channel

Volume

Control

AoutA

Σ

Right Channel

Audio Data

B Channel

Volume

Control

Figure 20. ATAPI Block Diagram

AoutB

DS593F1

41

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