CM6646X1
CM6646X1 is USB 2.0 High Speed Audio Codec manufactured by C-Media.
- Part of the CM6646X1-C comparator family.
- Part of the CM6646X1-C comparator family.
DESCRIPTION
The CM6646X1 is a USB 2.0 high-speed audio codec with 2-channel DAC and 2-channel ADC for Gaming Headset applications. It supports two playback audio devices with independent volume control for game and chat. It also supports mixing function for two playback audio devices. Moreover, the CM6646X1 supports I2C, SPI, UART and GPIOs to municate with external device. There are 5 bands EQ for both playback and recording interface to pensate the frequency response of speaker or MIC unit or to fulfill personal listening experience.
The CM6646X1 is embedded with 8051 MCU and 512KB flash makes it is very flexible to change the USB topology or municate with external device by changing internal flash code. It also integrates 6 PWM LED drivers for status indication.
BLOCK DIAGRAM
FEATURES
- USB specification 2.0 full-speed/high-speed pliant
- USB audio class 2.0 pliant
- USB human interface device (HID) class 1.1 pliant
- Support USB suspend/resume/reset functions
- Support control, interrupt and isochronous data transfers
- Integrate 2-channel DAC and 2-channel ADC
- True Cap-less/zero-ground headphone driver with patent applied anti-pop technology
- Embedded oscillator for Crystal-less design
- Embedded 7-bits SAR ADC supports bo jack and Google button detection
- 2 stereo I2S serial audio output/input interfaces
- 1 I2C master, 1 I2C slave, 1 SPI master and 22
GPIOs
- Integrate 6 PWM LED drivers
- Support 5 bands playback and recording EQ
- Support 2 output end-points audio stream mixing function
USB Interface
Control Bus
-16 ~ +12d B 1d B/Step
-60 ~ +6d B 1d B/Step
HP_L HP_R
-60 ~ +6d B 1d B/Step
Chat_L Chat_R
HP_L Chat_L HP_R Chat_R
4KB SRAM
8051 MCU 512KB Flash
5-Band EQ 5-Band EQ
ADC1 ADC2
-15 ~ +33d B (1d B/step)
DAC1 DAC2
Mic_A_L Mic_A_R
Mic_A_L -15 ~ +33d B
(1d B/step)
Mic_A_R
Microphone...
