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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.
- CS4953x4/CS4970x4 1
- Contents 3
- P.2.1 Chip Features 13
- CS4953x4 14
- P.4 Firmware Overview 17
- P.4.2 DSP Condenser 18
- P.5.1 Power and Ground 18
- P.5.2 PLL Filter 19
- P.5.3 Clocking 20
- P.5.4 Control 21
- P.6 CS4970x4 Pin Assignments 22
- CS4970x4 Pin Assignments 23
- P.7 CS4953x4 Pin Assignments 30
- CS4953x4 Pin Assignments 31
- Chapter 1 39
- Operational Modes 39
- 1.1 Overview 39
- Operational Mode Selection 40
- Table 1-1. Operation Modes 40
- 1.3.1.1 Master Boot Protocol 45
- SPI Port 48
- 2.4.2 SPI Bus Dynamics 49
- 2.4.3 SPI Messaging 50
- 2.4.3.2 SPI Write Protocol 51
- 2.4.3.4 SPI Read Protocol 52
- 2.4.3.5 SCP1_IRQ Behavior 55
- 2.5.1 I 56
- C System Bus Description 56
- 2.5.2 I 57
- C Bus Dynamics 57
- I2C Port 58
- Figure 2-10. I 58
- C Address with ACK and NACK 58
- Figure 2-14. I 61
- C Write Flow Diagram 61
- Figure 2-15. I 63
- C Read Flow Diagram 63
- M S S M S M S M S M M 65
- 3.2.1 DAI Pin Description 67
- 3.2.3 BDI Port 69
- 3.2.4 Digital Audio Formats 69
- DAI Hardware Configuration 70
- 3.4.1 DSD Pin Description 73
- 4.2.1 DAO Pin Description 75
- Figure 4-2. I 77
- 4.2.6 S/PDIF Transmitter 83
- SDRAM Controller 86
- S, HCLK = 10 MHz 89
- S*150MHz)/16 = 146.44 = 0x93 89
- 6.1.1.1 SPDIF Clocking 92
- 6.1.2.1 HDMI Clocking 92
- 7.2.1 Firmware Modules 94
- 7.2.2 Overlay Architecture 94
- Firmware Messaging 95
- 7.3 Firmware Messaging 95
- 7.4.2 DSP_CFG_xxx Registers 100
- 7.4.3 Status Registers 105
- Legacy API Still in Use 106
- 7.5 Legacy API Still in Use 106
- Index Variable Description 107
- 7.6.1 Overview 109
- OS Firmware Module 110
- Overview 111
- Development Flow 112
- 8.2 Development Flow 112
- Elements of a Project 114
- 8.3 Elements of a Project 114
- Creating a Flash Image 125
- 8.5 Creating a Flash Image 125
- Using DSP Condenser 127
- 8.6 Using DSP Condenser 127
- 8.7 Creating a Flash Image 130
- Figure 8-19. CDM Window 134
- Host Activity 138
- 8.9 Host Activity 138
- 9.1.1 Usage 140
- Figure 9-4. Run Runtime GUI 141
- Runtime GUI Current Project 142
- Figure 9-7. Connection Group 142
- Figure 9-8. Command Group 143
- Figure 9-9. DSP Status Group 144
- Introduction 150
- List of Questions and Answers 151
- C.1.1 DTS 96/24 154
- and DTS-ES 154
- Revision History 162
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