C-Media CM6533 - Description and Overview; Features; Applications; Pin Assignment

CM6533,CM6533N,CM6533X1,CM6533DH
USB Audio Chip
Page 3 / 60 www.cmedia.com.tw
Rev.1.7 Copyright© C-Media Electronics Inc.
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