CM6533-N Datasheet, PDF (29/60 Pages) C-Media Electronics – USB 2.0 Full-Speed compliant

CM6533,CM6533N,CM6533X1,CM6533DH
USB Audio Chip
6.5.4 Simple Process of Firmware Update
Host
1. Get register 0x3E
2. Modify CS_SEL to CS2, then write back to register 0x3E
Device
3. When CS_SEL is changed to CS2, firmware will erase the whole flash automatically
4. Send vendor command 0x06 to check if the erase process finished
5. Use vendor command 0x03 with auto-verify option to write flash
If the data verification fails, the device will stall the vendor command
Repeat writing flash ……
6. Firmware update complete
Page 29 / 60
Rev.1.6
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