C-Media CM6533 Manual

DESCRIPTION
The CM6533/CM6533N/CM6533X1/CM6533DH is a
USB 2.0 audio chip built-in 8051 for flexible
applications. With integrated Tri-Colors PWM LED
driver and two (2)-channel ADC/DAC and S/PDIF
interface that makes it suitable for headset,
docking, speaker and microphone applications.
The internal 8051 can also be developed to a lot of
different applications, such as Microsoft™ Lync /
Skype/VoIP device, Android Phone or Tablet/Slate
docking device. The CM6533 /CM6533N /CM6533X1
/CM6533DH is compatible with USB Audio Class 1.0
and USB 2.0 Full-Speed, thus it can plug & play
without any additional software installation on
major operating systems. The internal DAC and
ADC support from 8 ~ 96 KHz sampling rate and
16/24 bits resolution.
The CM6533/CM6533N/CM6533X1/CM6533DH
integrates equalizer on both playback and
recording paths to compensate the frequency
response of microphone and headphone.
The CM6533/CM6533N/CM6533X1/CM6533DH also
integrates 256K Byte flash (Including 32KB F/W
programming size) and crystal but requires few
passive components to make a finish product.
Thus, it can save the total BOM cost and PCB area
can be smaller.
BLOCK DIAGRAM
USB
Interface
Page 1 / 60
Rev.1.7
CM6533,CM6533N,CM6533X1,CM6533DH
Digital Gain
-16 ~ 12dB
(1dB/step)
AGC
ADC
5-Band EQ
32KB SRAM
Internal Clock
ROM(4KB)
Digital Gain
MCU with
-62 ~ 0dB
256KB Flash
(1dB/step)
DAC
5-Band EQ
FEATURES
 USB 2.0 Full-Speed compliant
 USB Audio Class 1.0 compliant
 USB Human Interface Device (HID) Class 1.11 compliant
 Two (2)-channel DAC for audio output interface
 Two (2)-channel ADC for audio input interface
 Supports Digital Microphone interface
 Built-in S/PDIF transmitter
 Built-in Equalizer on both playback and recording paths
 Built-in AGC (Auto Gain Control) on recording path
 Supports dual tone generator
 Supports USB suspend/resume/reset functions
 Supports control, interrupt, bulk, and isochronous data
transfers
 Embedded 1T 8051 with 32K Byte SRAM and 256K Byte
flash(Including 32KB F/W programming size)
 Supports OMTP and CTIA auto switch on a 4-pole jack
 Integrated Tri-Colors PWM LED driver
 Master/Slave H/W I2C/SPI/UART control interface for
external audio devices or FLASH access
 Supports embedded oscillator without external crystal
 Built-in 30mW @ R=32 headphone amplifier
 On chip watchdog timer
Analog Gain
-18 ~ 45dB
(1dB/step)
Mux
Analog Gain
-30 ~ 33dB
(1dB/step)
+12dB
-44 ~ 0dB (1dB/step)
Copyright© C-Media Electronics Inc.
USB Audio Chip
Microphone In
Analog Gain
-15 ~ 32dB
(1dB/step)
Analog Gain
Speaker/
Heaphone
SPDIF Out
GPIO x 12
PWM LED X 3
Uart, I2C, SPI
www.cmedia.com.tw