Cirrus Logic CS4970x4 - Manual (Page 139)

8-29 Copyright 2013 Cirrus Logic, Inc. DS810UM6
Host Activity
CS4953x4/CS4970x4 System Designer’s Guide
Figure 8-21. Changing Concurrency Modes
Note: To perform Host Writes / Reads, follow the steps in Figure 2-3 on page 2-5 (Writes) and Figure
2-4 on page 2-6 (Reads).
§§
Host Sends Input Source Change Commands
to Change Input Source to One Other
than the Default)
Send DSP Manager API commands
for concurrency mode change
Master Boot
Host Reads all unsolicited messages,
including:
--Boot message
--Autodetect message
--ACCN message (if not silence/PCM)
Host Sets System to Mute
Success?
Yes
No
Success?
Yes
No
Host Reads all unsolicited messages,
including:
--Autodetect message
--ACCN message (if not silence/PCM)
Host Reads all unsolicited messages,
including:
--Autodetect message
--ACCN message (if not silence/PCM)
Host Sends PPM
Commands
Host Sets System
to Unmute
Note: Current firmware does not support changing input source from HDMI/Multichannel source
to SPDIF source using DSP Manager API commands. Cirrus Logic recommends using
SPDIF as the default input source in the flash_image.xml file and toggling the DSP Reset to
switch to SPDIF source from HDMI/Multichannel source.
See Note
below this
flow chart.