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C-MEDIA

CM119A Datasheet Preview

CM119A Datasheet

High Integration/Low Cost USB Audio Controller

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CM119A
High Integration/Low Cost USB Audio Controller
DESCRIPTION
CM119A is a highly integrated single chip USB audio
controller specifically for VoIP (Voice over internet
protocol) application. All essential analog modules
are embedded in CM119A, including dual DAC and
earphone driver, ADC, microphone booster, PLL,
regulator, and USB transceiver. It’s also support
8GPIO pins and buzzer output pin for VoIP
application. In addition, audio adjustment can be
easily controlled via specific HID compliant volume
control pins. Many features are programmable with
jumper pins or external EEPROM. Vender can
customize unique USB VID / PID / Product_String /
Manufacture_String to EEPROM for VoIP software
authentication. Moreover, individual unique phone
number for each device is possible via serial
number stored in external EEPROM.
FEATURES
Compliant with USB 2.0 Full Speed Operation
Compliant with USB Audio Device class
specification v1.0
Supports USB Suspend/Resume Mode and remote
Wakeup with Volume Control pins
Single 12MHz Crystal input with on-chip PLL and
embedded USB transceiver
Jumper Pin for Speaker Mode (Playback Only) or
Headset Mode (Playback + Recording)
For Headset Mode, USB audio function topology
has 2 Input Terminals, 2 Output Terminals, 1
Mixer Unit, 1 Selector Unit, and 3 Feature Units
Jumper Pin for Operation System Mixer Unit
Enable/Disable under Headset Mode
BLOCK DIAGRAM
REGV
PWRSEL
MODE
PDSW SEL pins
VOLUP
VOLDN
MUTER LEDO MCU
MUTEP LEDR I/F GPIO BUZZ SPDIFO
CS
SK
DW
DR
USBDP
USBDM
XI
XO 12 MHz
5- > 3. 3
regulator
USB interrupt
processing with4
byte FIFO
3.3V
EEPROM
interface
USB
TRX
USB
interface
4 byte
FIFO
USB control
processing
ISO out
processing
( with x2 mod)
12. 288/11. 2896 MHz
with adjustment
48 MHz
PLL1
PLL2
ISO in
processing
PLL3 12.288/
11. 2896MHz
TEST
interface logics
ROM
300 x 16 SRAM
High-Pass Filter
VREF
(2.25V)
bandgap
reset power on
reset
16 bit
DAC
sync by
VPR_ CLK
0 ~-45dB
38 steps
voltage linear
+
Vref
+
Vref
+
Vref
16 bit
DAC
16 bit Sigma-
Delta ADC
Vref +
0 ~-45dB
38 steps
sync by voltage linear
VPL_ CLK
+ Vref
+
Vref
+22.5~ - 0 dB
16 steps
+ Vref
4.5 V( drive typ4mA)
+22. 5 ~ 0 dB
16 steps
BOOST
+20 dB boost enable
LOR
LOBS
LOL
MICIN
VREF
VBIAS
www.cmedia.com.tw
Copyright © C-Media Electronics Inc.
Rev. 2.1 Page 1/33




C-MEDIA

CM119A Datasheet Preview

CM119A Datasheet

High Integration/Low Cost USB Audio Controller

No Preview Available !

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
www.cmedia.com.tw
Copyright © C-Media Electronics Inc.
Rev. 2.1 Page 2/33


Part Number CM119A
Description High Integration/Low Cost USB Audio Controller
Maker C-MEDIA
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CM119A Datasheet PDF






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