Best High Integration/Low Cost USB Audio Controller
for PC Internet Phone
CM109 USB I/O Controller
DataSheet
Version 1.3a
C-MEDIA ELECTRONICS INC.
TEL: 886-2-8773-1100 FAX: 886-2-8773-2211
6F, 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106, R.O.C.
For detailed product information, please contact
sales@cmedia.com.tw
CM109
High Integration / Low Cost USB Audio Controller
for PC Internet Phone
Date: 08/Sep/2005 Version: 1.3a
- 1 -
NOTICES
THIS DOCUMENT IS PROVIDED "AS IS" WITH NO WARRANTIES WHAT SO EVER,
INCLUDING ANY WARRANTY OF MERCHANT ABILITY, NONINFRINGEMENT, FITNESS FOR
ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY
PROPOSAL, DOCUMENT OR SAMPLE.
ALL RIGHTS RESERVED. NO PART OF THIS DOCUMENT MAY BE REPRODUCED OR
TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL,
INCLUDING INFORMATION STORAGE AND RETRIEVAL SYSTEMS, WITHOUT
PERMISSION IN WRITING FROM C-MEDIA ELECTRONICS, INC.
COPYRIGHT
Copyright (c) 2003-2006 C-Media Electronics Inc.
All rights reserved. All content included on this document, such as text, graphics, logos, button
icons, images, audio clips, digital downloads, data compilations, and software, is either the
exclusive property of C-Media Electronics Inc., its affiliates (collectively, "C-Media"), its content
suppliers, or its licensors and protected by Republic of China and international copyright laws.
TRADEMARKS
C-Media, the C-Media Logo, Xear 3D, Xear 3D Logo, Speaker Shifter, Smart Jack, and Smart
Audio Jack are trademarks of C-Media Electronics Inc. in Republic of China and/or other
countries. All other brand and product names listed are trademarks or registered trademarks of
their respective holders and are hereby recognized as such.
*C-Media reserves the right to
modify the specifications without further notice*
CM109
High Integration / Low Cost USB Audio Controller
for PC Internet Phone
Date: 08/Sep/2005 Version: 1.3a
- 2 -
TABLE OF CONTENTS
1.
DESCRIPTIONS
AND
OVERVIEW 4
2.
FEATURES
4
3.
PIN DESCRIPTIONS
6
3.1
PIN
ASSIGNMENT
BY
PIN
NUMBER
6
3.2
PIN-OUT DIAGRAM
6
3.3
PIN SIGNAL DESCRIPTIONS
7
4.
MCU INTERFACE
9
5.
BLOCK DIAGRAM
9
6.
ORDERING INFORMATION
10
7.
FUNCTION DESCRIPTIONS
11
7.1
USB INTERFACE
11
7.1.1
DEVICE DESCRIPTOR
11
7.1.2
CONFIGURATION
DESCRIPTOR
12
7.1.3
CONTENT FORMAT FOR 94C46
12
7.1.4
USB
AUDIO
TOPOLOGY
DIAGRAM
13
7.2
JUMPER
PINS
AND
MODE
SETTING
13
7.3
HID FEATURE
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
16
7.4.2
ACCESS VIA ENTERNAL INTERFACE
BY
MCU
19
CM109
High Integration / Low Cost USB Audio Controller
for PC Internet Phone
Date: 08/Sep/2005 Version: 1.3a
- 3 -
7.4.3
INDIRECT
ACCESSED
REGISTERS
22
7.5
MCU INTERFACE
23
7.6
BUZZER OUTPUT
28
8.
ELECTRICAL
CHARACTERISTICS
29
8.1
ABSOLUTE
MAXIMUM
RATING
29
8.2
OPERATION CONDITIONS
29
8.3
ELECTRICAL PARAMETERS
30
9.
FREQUENCY RESPONSE GRAPHS
31
9.1
DIGITAL PLAYBACK FOR LINE OUTPUT FREQUENCY (10K OHM LOADING)
31
9.1.1
FREQUENCY
RESPONSE
48KS/SEC
31
9.1.2
FREQUENCY
RESPONSE
44.1KS/SEC
31
9.2
DIGITAL PLAYBACK FOR LINE OUTPUT FREQUENCY (32 OHM LOADING)
32
9.2.1
FREQUENCY
RESPONSE
48KS/SEC
32
9.2.2
FREQUENCY
RESPONSE
44.1KS/SEC
32
9.3
DIGITAL RECORDING FOR LINE OUTPUT FREQUENCY
33
9.3.1
FREQUENCY
RESPONSE
48KS/SEC
33
9.3.2
FREQUENCY
RESPONSE
44.1KS/SEC
33
10.
APPLICATION
CIRCUIT
REFERENCE
34
CM109
High Integration / Low Cost USB Audio Controller
for PC Internet Phone
Date: 08/Sep/2005 Version: 1.3a
- 4 -
1.DESCRIPTIONS AND OVERVIEW
CM109 is a highly integrated single chip USB audio controller specifically for VoIP (Voice
over internet protocol) application. All essential analog modules are embedded in CM109,
including dual DAC and earphone driver, ADC, microphone booster, PLL, regulator, and
USB transceiver. 8 GPIO pins can constitute a 24 key matrix directly support keypad
control function without MCU. It's also support 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 customized unique USB VID/PID to EEPROM for VoIP software authentication.
Moreover, individual unique phone number for each device is possible via serial number
stored in external EEPROM. Moreover, CM109 provided I2C interface with MCU
application for LCM integrated and advanced functions.
VoIP applications are becoming increasing popular as VoIP can provide free or low-cost
calling worldwide. To provide a VoIP experience that is the same as using a regular phone
and eliminate the poor call quality that results from using the PC audio, C-Media has
developed CM109 USB Controller that enables a regular phone, handset, or headset
which is interfaced to the USB port on the PC. With the C-Media OEMs can quickly bring
to market a family of low cost high quality VoIP products.
2. 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
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