CS47048 Data Sheet

Audio SOC Processor Family

DS787A7

Copyright 2008 Cirrus Logic

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Table of Contents

FEATURES ......................................................................................................................... 1

1. Documentation Strategy .........................................................................................................6

2. Overview ..................................................................................................................................6

2.1 Licensing ............................................................................................................................................... 6

3. Code Overlays .........................................................................................................................7

4. Hardware Functional Description .........................................................................................8

4.1 DSP Core .............................................................................................................................................. 8

4.2 DSP Memory ......................................................................................................................................... 9

4.2.1 DMA Controller ......................................................................................................................... 9

4.3 On-chip DSP Peripherals ...................................................................................................................... 9

4.3.1 Analog to Digital Converter Port (ADC) .................................................................................... 9

4.3.2 Digital to Analog Converter Port (DAC) .................................................................................... 9

4.3.3 Digital Audio Input Port (DAI) .................................................................................................. 10

4.3.4 S/PDIF RX Input Port (DAI) .................................................................................................... 10

4.3.5 Digital Audio Output Port (DAO) ............................................................................................. 10

4.3.6 S/PDIF TX Output Port (DAO) ................................................................................................ 10

4.3.7 Sample Rate Converters (SRC) .............................................................................................10

4.3.9 GPIO ....................................................................................................................................... 11

4.3.10 PLL-based Clock Generator ................................................................................................. 11

4.3.11 Hardware Watchdog Timer ................................................................................................... 11

4.4 DSP I/O Description .............................................................................................................................11

4.4.1 Multiplexed Pins ..................................................................................................................... 11

4.4.2 Termination Requirements ...................................................................................................... 11

4.4.3 Pads ....................................................................................................................................... 11

4.5 Application Code Security ................................................................................................................... 12

5. Characteristics and Specifications .....................................................................................13

5.1 Absolute Maximum Ratings ................................................................................................................. 13

5.2 Recommended Operating Conditions ................................................................................................. 13

5.3 Digital DC Characteristics ................................................................................................................... 13

5.4 Power Supply Characteristics ............................................................................................................. 14

5.5 Thermal Data (100-Pin LQFP with Exposed Pad) ...............................................................................14

5.6 Digital Switching Characteristics— RESET ......................................................................................... 15

5.7 Digital Switching Characteristics — XTI .............................................................................................. 15

5.8 Digital Switching Characteristics — Internal Clock .............................................................................. 16

5.9 Digital Switching Characteristics — Serial Control Port - SPI Slave Mode ......................................... 17

5.10 Digital Switching Characteristics — Serial Control Port - SPI Master Mode ..................................... 18

5.13 Digital Switching Characteristics — Digital Audio Slave Input Port ................................................... 21

5.14 Digital Switching Characteristics — Digital Audio Output Port .......................................................... 22

5.15 Digital Switching Characteristics — S/PDIF RX Port ........................................................................23

5.16 ADC Characteristics .......................................................................................................................... 24

5.16.1 Analog Input Characteristics (Commercial) .......................................................................... 24

5.16.2 Analog Input Characteristics (Automotive) ........................................................................... 25

5.16.3 ADC Digital Filter Characteristics ......................................................................................... 27

5.17 DAC Characteristics .......................................................................................................................... 27

5.17.1 Analog Output Characteristics (Commercial) ....................................................................... 27