9 Serial Interfaces ............................................................................................................................................ 34
9.1 UART Interface .................................................................................................................................... 34
9.1.1 UART Configuration While Reset is Active ............................................................................ 35
9.1.2 UART Bypass Mode ............................................................................................................... 36
9.1.3 Current Consumption in UART Bypass Mode ........................................................................ 36
9.2 USB Interface ...................................................................................................................................... 36
9.3 Serial Peripheral Interface ................................................................................................................... 37
9.3.1 Instruction Cycle ..................................................................................................................... 37
9.3.2 Writing to the Device .............................................................................................................. 37
9.3.3 Reading from the Device ........................................................................................................ 37
9.3.4 Multi-slave Operation ............................................................................................................. 38
9.4 I
2
C Interface ......................................................................................................................................... 38
9.4.1 Software I
2
C Interface ............................................................................................................ 38
9.4.2 Bit-serialiser Interface ............................................................................................................ 38
10 Audio Interface .............................................................................................................................................. 39
10.1 Audio Input and Output ........................................................................................................................ 39
10.2 Stereo Audio Codec Interface .............................................................................................................. 40
10.2.1 Stereo Audio Codec Block Diagram ....................................................................................... 40
10.2.2 Stereo Codec Set-up .............................................................................................................. 40
10.2.3 ADC ........................................................................................................................................ 41
10.2.4 ADC Sample Rate Selection .................................................................................................. 41
10.2.5 ADC Digital Gain .................................................................................................................... 41
10.2.6 ADC Analogue Gain ............................................................................................................... 42
10.2.7 DAC ........................................................................................................................................ 42
10.2.8 DAC Sample Rate Selection .................................................................................................. 42
10.2.9 DAC Digital Gain .................................................................................................................... 42
10.2.10 DAC Analogue Gain ............................................................................................................... 44
10.2.11 Microphone Input ................................................................................................................... 45
10.2.12 Line Input ............................................................................................................................... 47
10.2.13 Output Stage .......................................................................................................................... 48
10.2.14 Mono Operation ..................................................................................................................... 48
10.2.15 Side Tone ............................................................................................................................... 49
10.2.16 Integrated Digital Filter ........................................................................................................... 49
10.3 PCM Interface ...................................................................................................................................... 50
10.3.1 PCM Interface Master/Slave .................................................................................................. 50
10.3.2 Long Frame Sync ................................................................................................................... 51
10.3.3 Short Frame Sync .................................................................................................................. 51
10.3.4 Multi-slot Operation ................................................................................................................ 52
10.3.5 GCI Interface .......................................................................................................................... 52
10.3.6 Slots and Sample Formats ..................................................................................................... 52
10.3.7 Additional Features ................................................................................................................ 53
10.3.8 PCM Timing Information ........................................................................................................ 53
10.3.9 PCM_CLK and PCM_SYNC Generation ................................................................................ 57
10.3.10 PCM Configuration .....................................................................................................
............ 57
10.4 Digital Audio Interface (I²S) .................................................................................................................. 59
11 Power Control and Regulation ...................................................................................................................... 64
11.1 Power Control and Regulation ............................................................................................................. 64
11.2 Power Sequencing ............................................................................................................................... 64
11.3 External Voltage Source ...................................................................................................................... 65
11.4 Switch-mode Regulator ....................................................................................................................... 65
11.5 High-voltage Linear Regulator ............................................................................................................. 65
11.6 Low-voltage Linear Regulator .............................................................................................................. 65
11.7 Low-voltage Audio Linear Regulator .................................................................................................... 66
Contents
CS-110309-DSP5
Production Information
This material is subject to CSR's Non-Disclosure Agreement
© Cambridge Silicon Radio Limited 2008
Page 5 of 98
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Prepared for peng liu - neusoft.com - Wednesday, August 17, 2011
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