CM6327A
USB Single-Chip Audio Solution for Mono Microphone
DESCRIPTION
The CM6327A is C-Media’s new Audio SOC IC
designed for advanced VoIP applications. It boasts
a high-performance mono ADC, as well as I2C
interface, that allows for communication with
various microprocessors and DSPs. The CM6327A
offers low-noise, high-quality speech input,
important when it comes to recording or
broadcasting conference calls or public speeches.
Also, the CM6327A integrates all essential analog
modules, including 1-ch ADC, PLL, regulator and
USB transceiver modules, along with an EEPROM
that allows you to customize the product string,
PID and VID. Sampling rates of 8/11.025/16/22.05/
32/44.1 and 48 KHz, high-quality 16-bit resolutions
and user-friendly general purpose inputs and
outputs for customized functions are supported. In
addition, many features can be programmed using
an external EEPROM and MCU, which are easily
controlled via the HID software interface.
FEATURES
USB specification 2.0 full speed-compliant and
USB IF-certified
USB audio device specification 1.0- and USB HID
specification 1.1-compliant
Supports control/interrupt/isochroous data
transfers
USB suspend/resume and remote wake-up
support
Embedded USB transceiver and power-on reset
circuit
Single 12MHz crystal input with on-chip PLL
Supports series number string for operation
system detection
Serial EEPROM programming interface supports
customized VID/PID/product and manufacture
strings
EEPROM interface supports 24C02 data format
BLOCK DIAGRAM
CM6327A
GPIO/LED
PC
USB host
USB
interface
Interface controller &
signal processing
16-bit
48KHz
ADC
PGA
Regulator
ROM
Register
Internal PLL
PLL
www.cmedia.com.tw
Copyright© C-Media Electronics Inc.
I2C
Rev. 2.0
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