CM6500B Datasheet, PDF(3/36 Page) C-Media Electronics

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CM6500B Datasheet, PDF (3/36 Pages) C-Media Electronics – USB Audio Sound Chip

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CM6500 / CM6500B

USB Audio Sound Chip

TABLE OF CONTENTS

1 Description and Overview ............................................................................................................... 5

2 Features ............................................................................................................................................ 5

3 Applications ..................................................................................................................................... 7

4 Block Diagram ................................................................................................................................. 8

5 Pin Assignment ................................................................................................................................ 9

5.1 Pin-Out Diagram .............................................................................................................................. 9

5.2 Pin Description............................................................................................................................... 11

6 USB Audio Topology ..................................................................................................................... 13

6.1 Headset Topology........................................................................................................................... 13

6.2 Speaker Topology........................................................................................................................... 14

6.3 Docking Topology.......................................................................................................................... 16

6.4 Microphone (Stereo) Topology ...................................................................................................... 17

7 Function Description...................................................................................................................... 19

7.1 Recording AGC.............................................................................................................................. 19

7.2 HID Function ................................................................................................................................. 21

7.2.1 HID interrupt in............................................................................................................. 21

7.2.2 HID Get_Input_report................................................................................................... 21

7.2.3 HID Set_Output_report................................................................................................. 22

7.3 Vendor Command Definition ......................................................................................................... 23

7.3.1 Vender Command Read ................................................................................................ 23

7.3.2 Vender Command Write................................................................................................ 24

7.4 SPDIF Control Description ............................................................................................................ 24

7.4.1 SPDIF Frame Description ............................................................................................. 24

7.4.2 SPDIF Out Channel Status............................................................................................ 26

7.5 Digital Mic ..................................................................................................................................... 27

7.6 I2C Interface .................................................................................................................................. 28

7.6.1 I2C Master Mode .......................................................................................................... 28

7.6.2 I2C-Master Read with clk_sync mode.......................................................................... 28

7.6.3 I2C Slave Mode ............................................................................................................ 29

8 Electrical Characteristics................................................................................................................ 30

8.1 Absolute Maximum Ratings .......................................................................................................... 30

8.2 Recommended Operation Conditions ............................................................................................ 30

8.3 Power Consumption ....................................................................................................................... 30

8.4 DC Characteristics ......................................................................................................................... 30

8.5 Audio Performance ........................................................................................................................ 32

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