CRD-49530-USB Cirrus Logic Inc, CRD-49530-USB Datasheet - Page 10

• Manufacturer Part Number: CRD-49530-USB
• Description: Audio Modules & Development Tools Eval Bd 32-Bit Aud Dcdr & Prgrmble DSP
• Manufacturer: Cirrus Logic Inc

Specifications of CRD-49530-USB

• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CRD49530-USB System Description
CRD49530-USB User’s Manual
1-5
1.3.7 CS8416 S/PDIF RX
1.3.8 CS42448 Audio Codec
1.3.9 Memory
Audio input data to the DSP can come from any of the following sources:
The CS4953xx has many applications stored in internal ROM, but a host is still required to configure the
application for a particular system. The CRD49530 allows the PC to act as a host to boot and configure
the DSP through the GUI software.
The CS4953xx can also be booted from external serial flash for custom applications that are not stored in
the DSP’s ROM.
The CS8416 (U3) is a 192 kHz S/PDIF receiver with an integrated input multiplexer. All of the S/PDIF
input jacks (RX0-RX3) are connected to the CS8416. The active S/PDIF jack is selected by changing the
internal mux through the serial host port of the CS8416. This selection is controlled through the Audio In
configuration within DSP Composer (see
When S/PDIF audio is being processed, the CS8416 must master MCLK for the system (see
Clocking" on page 1-6
The CS42448 (U4) is a high-performance, multi-channel audio codec capable of supporting sample rates
up to 192 kHz on its 6 ADCs and 8 DACs. This device is used for all analog-to-digital and digital-to-analog
conversions on the CRD49530.
All analog inputs (AIN1-AIN6) and all analog outputs (AOUT1-AOUT8) are connected to the CS42448.
The microphone input shares the AIN5 ADC with the AIN5 RCA jack. When the microphone is in use, the
AIN5 RCA jack is ignored.
When analog audio is being processed, the 24.576 MHz crystal for the CS4953xx must master MCLK for
the system (see
The CRD49530 is populated with a 4 Mbit serial flash. There are 2 footprints (U11, U13) on the board for
compatibility with both standard 8-pin serial flash pinouts. The serial control lines are shared by both
footprints. Only one serial flash chip can be populated.
The CS4953xx can use external SDRAM (U7) to implement features such as large multi-channel audio
delays. A 64 Mbit SDRAM (166 MHz) is connected to the 150 MHz memory bus of the CS4953xx.
There is an additional unpopulated footprint for a parallel flash (U6) memory device. This device was
routed on the board as an example of how to route the memory bus when using a parallel flash memory,
Note: The 144-pin footprint on this board is also compatible with the CS495xx family of DSPs. The
• CS8416 (U3)
• CS42448 (U4)
• CRD USB Master (feature not currently supported)
• Audio output data from the DSP can be sent to the following destinations:
• CS42448 for conversion to Analog Output (AOUT1 - AOUT8)
• Optical S/PDIF Out (SPDIF_TX), this option disables AOUT7 and AOUT8
CRD49530 can support any CS495xx chip if the alternate stuffing options shown on the DSP
schematic page have been followed.
"Audio Clocking" on page 1-6
for details).
Copyright 2008 Cirrus Logic
Chapter 4
for details).
for details).
"Audio
DS705RD3