Cirrus Logic CS4970x4 - Manual (Page 137)

8-27 Copyright 2013 Cirrus Logic, Inc. DS810UM6
DSP Response after Master Boot.
CS4953x4/CS4970x4 System Designer’s Guide
# DSP Flash status messages
word 2: ef000020
word 3: 00008002
4. Issue the commands directly to put the DSP in update mode, described in the
DSP_CFG_AUDIO_SRC variable in Table 7-4, "DSP_CFG_xxx Firmware Configuration Registers"
on page 7-7 . This step is not necessary if flash.img is not already programmed.
Ef00000000000100
Ef00000600000007
Ef00001300000100
Ef00000000000001
read status messages
word 0: ef000020
word 1: 00008002
5. Play the flash_update.wav file using a bit-exact sound card or a player to the S/PDIF input
(SPDIF_RX0) of the CRD49700 evaluation board or the S/PDIF input port of target system.
6. Read the unsolicited mesg
c2000003 # SF status
40000000 # Found sync packets, Serial Flash update process
# starts
c2000006
xxxxxxx #current address/packet
7. After update is over, read the unsolicited messages:
c2000003 # SF status
80000000 # SF update process finish
c2000006
xxxxxxx #current address/packet
Refer to the application note, AN288MPF for detailed information about the messages in steps 6 and 7
8.8 DSP Response after Master Boot.
The DSP response after a successful Master Boot is shown in Figure 8-20 .
Figure 8-20. DSP Response after Successful Master Boot
The messages starting with “EF” correspond to the DSP Manager API in Section 7.4 “CS4953x4/
CS4970x4 DSP Manager API Description”on page 7-6 , and the messages in Figure 8-20 beginning with