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TAS5508BPAGR Datasheet(PDF) 3 Page - Texas Instruments |
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TAS5508BPAGR Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 106 page  www.ti.com Contents TAS5508B 8-Channel Digital Audio PWM Processor SLES162B – DECEMBER 2005 – REVISED APRIL 2006 1 Introduction ....................................................................................................................... 11 1.1 Features ..................................................................................................................... 11 1.2 Overview ..................................................................................................................... 12 1.3 Changes From the TAS5508A to the TAS5508B ...................................................................... 14 1.4 TAS5508B System Diagrams ............................................................................................. 15 2 Description ........................................................................................................................ 17 2.1 Physical Characteristics ................................................................................................... 17 2.1.1 Terminal Assignments .......................................................................................... 17 2.1.2 Ordering Information ............................................................................................ 17 2.1.3 Terminal Descriptions ........................................................................................... 18 2.2 TAS5508B Functional Description ....................................................................................... 20 2.2.1 Power Supply .................................................................................................... 20 2.2.2 Clock, PLL, and Serial Data Interface ........................................................................ 20 2.2.3 I 2C Serial-Control Interface .................................................................................... 21 2.2.4 Device Control ................................................................................................... 21 2.2.5 Digital Audio Processor (DAP) ................................................................................. 21 2.3 TAS5508B DAP Architecture ............................................................................................. 23 2.3.1 TAS5508B DAP Architecture Diagrams ...................................................................... 23 2.3.2 I 2C Coefficient Number Formats .............................................................................. 26 2.4 Input Crossbar Mixer ....................................................................................................... 30 2.5 Biquad Filters ............................................................................................................... 30 2.6 Bass and Treble Controls ................................................................................................. 31 2.7 Volume, Automute, and Mute ............................................................................................. 32 2.8 Automute and Mute Channel Controls .................................................................................. 33 2.9 Loudness Compensation .................................................................................................. 34 2.9.1 Loudness Example .............................................................................................. 35 2.10 Dynamic Range Control (DRC) ........................................................................................... 35 2.10.1 DRC Implementation ............................................................................................ 38 2.10.2 Compression/Expansion Coefficient Computation Engine Parameters ................................. 39 2.11 Output Mixer ................................................................................................................ 41 2.12 PWM ......................................................................................................................... 41 2.12.1 DC Blocking (High-Pass Filter Enable/Disable) ............................................................. 42 2.12.2 De-Emphasis Filter .............................................................................................. 42 2.12.3 Power-Supply Volume Control (PSVC) ....................................................................... 43 2.12.4 AM Interference Avoidance .................................................................................... 44 3 TAS5508B Controls and Status ............................................................................................ 45 3.1 I2C Status Registers ....................................................................................................... 45 3.1.1 General Status Register (0x01) ................................................................................ 45 3.1.2 Error Status Register (0x02) ................................................................................... 45 3.2 TAS5508B Pin Controls ................................................................................................... 45 3.2.1 Reset (RESET) .................................................................................................. 45 3.2.2 Power Down (PDN) ............................................................................................. 47 3.2.3 Back-End Error (BKND_ERR) ................................................................................. 47 3.2.4 Speaker/Headphone Selector (HP_SEL) ..................................................................... 48 3.2.5 Mute (MUTE) ..................................................................................................... 48 3.3 Device Configuration Controls ............................................................................................ 49 3.3.1 Channel Configuration Registers .............................................................................. 49 3.3.2 Headphone Configuration Registers .......................................................................... 50 3.3.3 Audio System Configurations .................................................................................. 50 3.3.4 Recovery from Clock Error ..................................................................................... 51 Contents 3 |
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