Cirrus-logic CS4970x4 Manual do Utilizador Página 138

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Host Activity
CS4953x4/CS4970x4 System Designer’s Guide
DS810UM6 Copyright 2013 Cirrus Logic, Inc 8-28
'81' correspond to the autodetection messages/response. For a description of autodetect messages, see
Section 7.3.7 “DSP_AUTODETECT_MSG”on page 7-4. Figure 8-21 shows the autodetect message for
silence.
8.9 Host Activity
The host carries out the following activities after a successful boot.
1. Flush the DSP message buffer by reading all outstanding messages.
2. Retrieve status information from the DSP using the DSP manager read commands set out in Table
7-5.
3. Send DSP Manager write commands to change concurrency mode if required. See examples of
write commands in Section 7.4.2.1 “Using DSP Condenser to Change/Load Firmware Modules”on
page 7-10 and in Appendix C, "Loading/Unloading Firmware Modules"
.
See the process flow for changing concurrency
1
modes in Figure 8-21.
1. Concurrency mode is the combination of firmware modules active at any one point in time.
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