CM119A
High Integration/Low Cost USB Audio Controller
TABLE OF CONTENTS
1 Description and Overview ..................................................................... 3
2 Features .......................................................................................... 3
3 Pin/Signal Description .......................................................................... 5
3.1 Pin Assignment by Pin Number ................................................................................. 5
3.2 Pin-Out Diagram .................................................................................................. 5
3.3 Pin Signal Description ........................................................................................... 6
4 MCU Interface.................................................................................... 8
5 Block Diagram ................................................................................... 8
6 Ordering Information ........................................................................... 9
7 Function Description...........................................................................10
7.1 USB Interface ....................................................................................................10
7.1.1
Device Descriptor .............................................................................................. 10
7.1.2
Configuration Descriptor...................................................................................... 11
7.1.3
Content Format for 93C46 .................................................................................... 12
7.1.4
USB Audio Topology Diagram ................................................................................. 13
7.2 Jumper Pins and Mode Setting: ...............................................................................14
7.3 HID Feature and Descriptions .................................................................................14
7.3.1
HID Descriptor .................................................................................................. 15
7.3.2
Windows Software Architecture for HID .................................................................... 16
7.4 Internal Registers ...............................................................................................16
7.4.1
Access via HID Class Command:.............................................................................. 17
7.4.2
Access via External Serial Interface by MCU: .............................................................. 20
7.4.3
Indirect Accessed Registers: .................................................................................. 22
7.5 MCU Interface....................................................................................................23
7.6 Buzzer Output ...................................................................................................27
8 Electrical Characteristics .....................................................................28
8.1 Absolute Maximum Rating .....................................................................................28
8.2 Operation Conditions ...........................................................................................28
8.3 Electrical Parameters...........................................................................................29
9 Frequency Response Graphs ..................................................................30
9.1 Line Out Freq Response @ 48KHz Sample Rate (10K Ohm Loading) ....................................30
9.2 Line Out THD+N @ 48KHz sample rate (10K Ohm Loading) ..............................................30
9.3 Microphone Input Freq Response @ 48KHz Sample Rate .................................................31
9.4 Microphone InP put THD+N @ 48KHz Sample Rate ........................................................31
Reference.............................................................................................32
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