CRD-49530-USB Cirrus Logic Inc, CRD-49530-USB Datasheet - Page 33

• 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

DS705RD3
4.4.2 Changing Serial Control Protocol (I
4.5 Programming the On-board Serial Flash
This dialog allows the user to set the following parameters for the CS4953xx Audio Output:
The CRD49530 is designed to communicate using either I
communication mode in DSP Composer go to the menu bar and select File
the Project Properties dialog. To configure Memory usage click on the Advanced button, as illustrated in
Figure
The CRD49530 is populated with 4 Mbits of serial Flash that can be used to store custom DSP firmware
or run-time firmware configuration options. In order to emulate a system that boots the DSP from Flash,
the serial flash can be programmed in system with the desired DSP firmware. The host (the PC in this
case) can be used to perform a host-controlled master boot (HCMB) to boot the CS4953xx.
A special .uld file is loaded into the CS4953xx which provides the programming interface to the system
host. Programming then becomes a sequence of messages to the CS4953xx.
Please contact your local Cirrus representative for the Flash programming .uld file and the associated
application note.
• LRCLK polarity - Select the phase of LRCLK when the left-sample will be shifted out.
• SCLK polarity - Select which edge of SCLK for which the output data will be valid.
• DAO1/DAO2 - Select independent or unified clock domains for the DAO1 and DAO2 audio output
• MCLK/SCLK Ratios - Select the ratio of LRCLK to MCLK, and LRCLK to SCLK.
ports.
4-10; Max memory allocation and external memory can be enabled from this panel.
Figure 4-10. CRD49530 Comm Mode / Memory Usage
Copyright 2008 Cirrus Logic
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2
C
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2
C or SPI protocols. In order to change the
or SPI
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Programming the On-board Serial Flash
) / Memory Usage
Properties, which brings up
CRD49530-USB User’s Manual
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