Cirrus Logic CS4970x4 - Manual (Page 138)

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.