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PDF CM108 Data sheet ( Hoja de datos )
| Número de pieza | CM108 | |
| Descripción | USB Audio I/O Controller | |
| Fabricantes | C-Media Electronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CM108 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
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SS
Best USB Audio I/O Controller for
Headset and Multi-Media Devices
CM108 High Integrated
USB Audio I/O Controller
DataSheet 1.5
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 [email protected]
TU UT
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CM108
Integration Dual DAC, Earphone Driver, ADC,
Microphone Booster, PLL, Regulator, and USB Transceiver
1. DESCRIPTION AND OVERVIEW
CM108 is a highly integrated single chip USB audio solution. All essential analog modules
are embedded in CM108, including dual DAC and earphone driver, ADC, microphone booster,
PLL, regulator, and USB transceiver. It is very suitable for USB headset, USB earphone or
USB audio interface box application. Many features are programmable with jumper pins or
external EEPROM. In addition, audio adjustment can be easily controlled via specific HID
compliant volume control pins. For value added application, external codec or audio DSP can
be connected to CM108 via I2S pin for further processing. 4 GPIO pins can be accessed with
customer application software for additional value added application.
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 Mixer Unit Enable / Disable under Headset Mode
For Speaker Mode, USB Audio Function Topology has 1 Input Terminal, 1 Output
Terminal, and 1 Feature Unit
Support One Control Endpoint, One Isochronous Out Endpoint, One Isochronous In
Endpoint, and One Interrupt In Endpoint
Date: Nov/01/2004
-4-
Version: 1.5
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CM108
Integration Dual DAC, Earphone Driver, ADC,
Microphone Booster, PLL, Regulator, and USB Transceiver
4. I²S INTERFACE
CM108 provide I2S interface for both playback and recording. External ADC, DAC, or DSP
PP
can be added to provide additional function in the USB audio system. CM108 sends out the
master clock (fixed at x256), LRCK (fixed at x64), and data clock. Therefore external ADC,
DAC, or DSP should be set at slave mode for I2S interface. Left channel of I2S bus is used for
PP
PP
CM108 mono recording. Both I2S buses use 5V tolerant pad so they can be easily interfacing
PP
with 5V or 3.3V devices. Playback data is simultaneously sent to both DAC and I2S bus.
PP
Recording source (from ADC or from I2S bus) can be selected by ADSEL jumper pin.
PP
LRCK
SCLK
SDATA
Left Channel
MSB -1 -2
+2 +1 LSB
Right Channel
MSB -1 -2
+2 +1 LSB
Date: Nov/01/2004
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Version: 1.5
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet CM108.PDF ] | |
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