2 ©Copyright 2005 Cirrus Logic, Inc. DS651UM23
Version 2.3
CobraNet Hardware User’s Manual
Table of Contents
Table of Contents
List of Figures.........................................................................................................................................4
1.0 .Introduction .....................................................................................................................................5
2.0 Features........................................................................................................................................... 6
2.1 CobraNet.............................................................................................................................6
2.2 CobraNet Interface..............................................................................................................6
2.3 Host Interface......................................................................................................................7
2.4 Asynchronous Serial Interface ............................................................................................7
2.5 Synchronous Serial Audio Interface....................................................................................7
2.6 Audio Clock Interface ..........................................................................................................7
2.7 Audio Routing and Processing............................................................................................7
3.0 Hardware..........................................................................................................................................8
4.0 Pinout and Signal Descriptions ........................................................................................................9
4.1 CS1810xx & CS4961xx Package Pinouts......................................................................... 10
4.1.1 CS1810xx/CS4961xx Pinout.............................................................................10
4.1.2 CM-2 Connector Pinout.....................................................................................11
4.2 Signal Descriptions ...........................................................................................................12
4.2.1 Host Port Signals ..............................................................................................12
4.2.2 Asynchronous Serial Port (UART Bridge) Signals ............................................12
4.2.3 Synchronous Serial (Audio) Signals..................................................................13
4.2.4 Audio Clock Signals .......................................................................................... 13
4.2.5 Miscellaneous Signals.......................................................................................14
4.2.6 Power and Ground Signals ...............................................................................14
4.2.7 System Signals .................................................................................................15
4.3 Characteristics and Specifications ....................................................................................16
4.3.1 Absolute Maximum Ratings ..............................................................................16
4.3.2 Recommended Operating Conditions ............................................................... 16
4.3.3 Digital DC Characteristics ................................................................................. 16
4.3.4 Power Supply Characteristics ...........................................................................16
5.0 Synchronization..............................................................................................................................17
5.1 Synchronization Modes.....................................................................................................17
5.1.1 Internal Mode ....................................................................................................18
5.1.2 External Word Clock Mode ............................................................................... 18
5.1.3 External Master Clock Mode .............................................................................18
6.0 Digital Audio Interface ....................................................................................................................19
6.1 Digital Audio Interface Timing ...........................................................................................20
6.1.1 Normal Mode Data Timing ................................................................................21
6.1.2 I
2
S Mode Data Timing....................................................................................... 21
6.1.3 Standard Mode Data Timing .............................................................................22
7.0 Host Management Interface (HMI).................................................................................................23
7.1 Hardware........................................................................................................................... 23
7.4 Protocol and Messages..................................................................................................... 28
7.4.1 Messages..........................................................................................................28
7.4.1.1. Translate Address .................................................................................29
7.4.1.2. Interrupt Acknowledge........................................................................... 29
7.4.1.3. Goto Packet...........................................................................................29
7.4.1.4. Goto Translation.................................................................................... 29
7.4.1.5. Packet Received ...................................................................................30
7.4.1.6. Packet Transmit ....................................................................................30
7.4.1.7. Goto Counters ....................................................................................... 30
7.4.2 Status ................................................................................................................31
