INTRODUCTION

CM6317A is a highly integrated single chip USB audio solution which comprises more USB audio controller and applications. According to coming more experiences in PC USB Audio peripheral from Vendors’ recommend, Cmedia aggressively design one single chip to let vendors to come more integration products, and increase more revenues.

CM6317A contains highly performance ADC, and is extended by additional interface like I2C , SPI , allowing all kinds of Micro processor or DSP to communicate it. Especially in USB Microphone application , CM6317A could give you low noise but high quality speech input solution , thus, when it comes to conference or public speech , it would be wonderful choice for you.

Also, CM6317A integrates all essential analog, 2CH ADC, PLL, regulator, USB transceiver, with external EEPROM to customize your own product string, PID and VID , 8/11/16/22/32/44.1/48KHz sampling rate and high quality 16-bit resolution and friendly general purpose inputs and outputs(GPIO) connect the CM6317A to peripheral hardware, like LED, keypads and buttons, there are many features could be programmable with external EEPROM and MCU. External MCU/EEPROM could be easily controlled via HID software interface. 2 LED indicator pins supported provide more flexible behavior with device on / off / operation / recording mute / and controllable flash time.

PRODUCT FEATURES

USB specification 2.0 Full speed compatible and USB IF certification
USB audio device class specification 1.0 and USB HID class specification 1.1 compliant
Support control, interrupt and isochroous data transfers
USB suspend/resume and remote wake-up supported
Embedded USB transceiver and power-on reset circuit
Single 12MHz Crystal Input with On-chip PLL
High-power (500mA) and Low-power (100mA) mode options supported
Support series number string for operation system detect
Serial EEPROM programming interface supports customized VID/PID/Product string/ Manufacture string for device name changed and configuration
EEPROM interface support 24C02 data format
2CH ADC Input
ADC sampling rate 8K / 11.025K / 16K / 22.05K / 32K / 44.1K / 48K Hz, 16-bit resolution
Dynamic Range: 96db, THD+N: -89~96db
Digital Linear Microphone Gain Control function (-16db~45db)
1.0 Vrms input swing biased at 2.25V
Support Microsoft HID functions
Support I2C & SPI (Master/Slave) control interface for external controller used
I2C MCU read/write support 16 bytes data transfer bandwidth
I2C interface support extra interrupt pin (INT)
MCU / EEPROM / GPIO control via HID / Vender command interface
USB audio topology has 1 Input Terminals, 1 Output Terminals, 1 Selector Unit, and 1 Feature Unit
Support 2 LED indicator pins:
On / Off / Operation
Recording mute
Support 8 GPIO and 3GPI Pins
Isochronous transfer uses Adaptive Mode with Internal PLL for Synchronization
Embedded Power-On-Reset Block
Single 5V power supply with embedded 5V to 3.3V regulator
Industry standard LQFP-48 Pin package

Support Hardware SDK tool for third-party software development