CM6302
USB High-Quality Dolby® Headphone Solution
TABLE OF CONTENTS
1
2
3
Description and Overview ..............................................................................................4
Features ...................................................................................................................4
Pin Descriptions ..........................................................................................................7
3.1
3.2
3.3
Pin Assignment by Pin Number...............................................................................7
Pin-Out Diagram................................................................................................7
Pin Signal Description .........................................................................................8
4
5
6
7
Block Diagram .......................................................................................................... 10
Ordering Information.................................................................................................. 11
Introduction to Dolby Headphone Technology .................................................................... 12
USB Audio Topology and Descriptors................................................................................ 14
7.1
7.2
7.3
7.4
7.5
7.6
USB Topology.................................................................................................. 14
Device Descriptors ........................................................................................... 15
Configuration Descriptors................................................................................... 16
Standard HID Interface Descriptors....................................................................... 17
Class-specific HID Interface Descriptors ................................................................. 17
Standard HID Interrupt In Endpoint Descriptors ........................................................ 17
8
Function Block Descriptions.......................................................................................... 18
8.1
8.2
8.3
I2C Interface................................................................................................... 18
8.1.1
8.1.2
Master Mode......................................................................................... 18
Slave Mode .......................................................................................... 18
Square S Interface (I2S I/F) ................................................................................ 22
8.2.1
8.2.2
I2S Mode ............................................................................................. 22
Left Justified Mode ................................................................................ 22
Serial Peripheral Interface ................................................................................. 22
8.3.1
the SPI Design Goal and SPI Transactions ...................................................... 23
2-bit Leading Mode ................................................................................ 27
The Serial Interface ............................................................................... 27
8.3.2
8.3.3
8.4
8.5
LED Behavior and Software Control....................................................................... 29
EEPROM Content Data Format ............................................................................. 30
9
Electrical Characteristics............................................................................................. 31
9.1
9.2
9.3
Absolute Maximum Rating .................................................................................. 31
Operation Conditions........................................................................................ 31
Electrical Parameters ....................................................................................... 32
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