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VT1702S Datasheet

High Definition Audio Codec

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VT1702S pdf
Data Sheet
VT1702S
High Definition Audio Codec
November 13, 2009
(Released under Creative Commons License)
Preliminary Revision 1.0



VIA
VIA

VT1702S Datasheet Preview

VT1702S Datasheet

High Definition Audio Codec

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VT1702S pdf
Data Sheet
VT1702S High Definition Audio Codec
ii
Table of Contents
Table of Contents ..................................................................................................................... ii
List of Figures..........................................................................................................................iii
List of Tables ...........................................................................................................................iii
1 Product Features ................................................................................................................... 1
1.1 Hardware Features ........................................................................................................ 1
1.2 Software Features ......................................................................................................... 2
2 Overview.............................................................................................................................. 3
3 Pinout .................................................................................................................................. 4
4 Pin List................................................................................................................................. 5
5 Pin Description...................................................................................................................... 6
5.1 Digital I/O Pins ............................................................................................................. 6
5.2 Analog I/O Pins ............................................................................................................ 7
5.3 Power and Ground ........................................................................................................ 7
6 High Definition Audio Link Protocol .......................................................................................... 8
6.1 Link Signaling............................................................................................................... 8
6.2 Signal Definitions .......................................................................................................... 8
6.3 Signaling Topology ...................................................................................................... 10
6.4 Frame Composition ..................................................................................................... 10
6.5 Output Frame ............................................................................................................. 12
6.6 Input Frame ............................................................................................................... 13
6.7 Reset and Initialization ................................................................................................ 14
6.8 Handling Stream Independent Sample Rates .................................................................. 18
6.9 Power Management ..................................................................................................... 19
6.10 Unsolicited Response Behavior Description ................................................................... 19
7 Widget Description .............................................................................................................. 20
7.1 Node ID List ............................................................................................................... 20
7.2 Root Node (Node ID = 00) ........................................................................................... 21
7.3 Audio Function Group (Node ID = 01) ........................................................................... 22
7.4 Audio Analog Output Converter Widget (Node ID = 10h, 1Dh) .......................................... 26
7.5 Audio Digital Output Converter (S/PDIF TX) Widget (Node ID = 11h, 1Bh) ......................... 30
7.6 Audio Analog Input Converter Widget AIW0(Node ID = 12h) ............................................ 33
7.7 Selector Widget SW0 (Node ID = 13h) .......................................................................... 37
7.8 Pin Widget PW1, PW5 (Node ID = 14h, 18h) .................................................................. 39
7.9 Pin Widget PW2 (Node ID = 15h).................................................................................. 42
7.10 Pin Widget PW3 (Node ID =16h) ................................................................................. 45
7.11 Pin Widget PW4 (Node ID =17h) ................................................................................. 49
7.12 Pin Widget PW6 (Node ID = 19h) S/PDIF TX Pin ........................................................... 54
7.13 Mixer Widget (Node ID = 1Ah).................................................................................... 57
7.14 Pin Widget PW7 (Node ID = 1Ch) HDMI Audio Output Pin .............................................. 60
7.15 Pin Widget PW8 (Node ID = 1Eh) ................................................................................ 63
7.16 Audio Analog Input Converter Widget AIW1 (Node ID = 1Fh) ......................................... 66
7.17 Audio Analog Input Converter Widget AIW2 (Node ID = 20h) ......................................... 70
8 Functional Descriptions ........................................................................................................ 74
8.1 Clock Control.............................................................................................................. 74
8.2 Interpolation / Decimation ........................................................................................... 74
8.3 HPF for ADC DC Removal ............................................................................................. 74
8.4 Audio Jack Detection Circuits........................................................................................ 75
8.5 Internal Loop-back and Peak Detection for Low Cost Production Test ................................. 75
8.6 Digital Microphone Implementation ............................................................................... 75
8.7 GPIO Implementation .................................................................................................. 76
9 Electrical Specification ......................................................................................................... 77
10 Mechanical Specification ..................................................................................................... 79
11 Application Circuit.............................................................................................................. 80
11.1 The System with Front Panel Design ............................................................................ 80
11.2 The System without Front Panel Design ....................................................................... 80


Part Number VT1702S
Description High Definition Audio Codec
Maker VIA
Total Page 30 Pages
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