Cirrus Logic CS485xx - Manual (Page 65)

5-1 Copyright 2009 Cirrus Logic, Inc. DS734UM7
Digital Audio Input Port Description
CS485xx Hardware User’s Manual
Chapter 5
Direct Stream Data (DSD) Input Interface
CS48560 is capable of accepting DSD audio data directly. DSD data differs from PCM in that audio is
provided as a contiguous stream of 1’s and 0’s on a single line. There is no framing clock (LRCLK), and
there is only one channel per line. The CS48560 supports internal conversion of DSD data to PCM which
can then be processed by the DSP.
Note: If DSD functionality is needed in a system design, contact your Cirrus Logic FAE.
5.1 Digital Audio Input Port Description
The CS48560 DSD port is designed to accept DSD audio data from up to 6 pins simultaneously (6 channels
total).
DSD features include:
• Up to Six DSD Input Pins
• One Shared DSD_CLK for All Data Pins
• Supports 44.1 kHz and 88.2 kHz Sample Rates
5.1.1 DSD Pin Description
Table 5-1 shows the mnemonic and pin description of the pins associated with the DSD port on CS48560.
5.1.2 Supported DSD Functional Blocks
Figure 5-1 below shows the functional block diagram of the features currently supported with the CS48560
DSD Port.
Table 5-1. DSDl Audio Input Port
Pin Name Pin Description
LQFP-48
Pin #
Pin Type
DSD_CLK
Bit clock used for latching the DSD audio
data. This clock is shared by DSD[5:0].
8 Input
DSD0 DSD Audio Input 0 10 Input
DSD1 DSD Audio Input 1 11 Input
DSD2 DSD Audio Input 2 13 Input
DSD3 DSD Audio Input 3 14 Input
DSD4 DSD Audio Input 4 15 Input
DSD5 DSD Audio Input 5 6 Input