CM6533-N Datasheet, PDF (3/60 Pages) C-Media Electronics – USB 2.0 Full-Speed compliant

CM6533,CM6533N,CM6533X1,CM6533DH
USB Audio Chip
TABLE OF CONTENTS
Release Notes .................................................................................................. 2
TABLE OF CONTENTS........................................................................................... 3
1 Description and Overview ............................................................................... 6
2 Features.................................................................................................... 6
2.1
USB Compliance................................................................................ 6
2.2
Integrated 8051 Microprocessor ............................................................. 6
2.3
Control Interface .............................................................................. 6
2.4
General.......................................................................................... 6
2.5
Audio I/O........................................................................................ 7
2.6
General Firmware Volume Setting Value ................................................... 8
2.7
CM6533/CM6533N/CM6533X1/CM6533DH Compared Table .............................. 8
3 Applications ............................................................................................... 9
4 Pin Assignment ...........................................................................................10
4.1
CM6533 Pin-out Diagram (LQFP48) .........................................................10
4.2
CM6533N Pin-out Diagram (QFN48) ........................................................11
4.3
CM6533X1 Pin-out Diagram (LQFP48) ......................................................12
4.4
CM6533DH Pin-out Diagram (LQFP48)......................................................13
4.5
Pin Description ................................................................................14
4.6
Pin Circuit Diagrams ..........................................................................17
5 USB Audio Topology......................................................................................18
5.1
CM6533N/CM6533 Headset Topology.......................................................18
5.2
CM6533X1/CM6533DH Headset Topology ..................................................19
6 Function Description ....................................................................................20
6.1
Playback Equalizer ...........................................................................20
6.1.1 5-band equalizer ........................................................................20
6.1.2 Four (4) Preset EQ Mode................................................................22
6.2
Recording Equalizer ..........................................................................23
6.3
Recording AGC.................................................................................23
6.4
HID Function...................................................................................25
6.4.1 HID Interrupt in ..........................................................................25
6.4.2 HID get_input_report ...................................................................26
6.4.3 HID set_output_report..................................................................27
6.5
Vendor Command Definition ................................................................28
6.5.1 Vendor Command Read .................................................................28
6.5.2 Vendor Command Write ................................................................28
6.5.3 USB Vendor Requests....................................................................28
6.5.4 Simple Process of Firmware Update ..................................................29
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Rev.1.6
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