CM106-L+ C-Media Electronics, CM106-L+ Datasheet - Page 19

• Manufacturer Part Number: CM106-L+
• Description: USB Audio I/O Controller
• Manufacturer: C-Media Electronics

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6. FUNCTION DESCRIPTION
The internal registers of CM106F+/L+ can be divided to two parts. Some of them (REG0, REG1,
REG2 and REG3) are 16-bit width and can be accessed via HID interface. The others are 8-bit
width and can be accessed by vendor requests. To access registers via HID interface, users
should issue a “Set Output Report” HID request. The four bytes of output report data is organized
as below:
In addition to internal registers, users can also access external serial EEPROM by the same
way:
When users intend to read register / EEPROM by “Set Output Report”, the returned data will be
transferred to USB host via HID input report through interrupt pipe. The three bytes of input
report data is organized as below:
Date: 08/19/2005
4
6.1 INTERNAL REGISTER
Byte [0]
Byte [1]
Byte [2]
Byte [3]
Byte [0]
Byte [1]
Byte [2]
Byte [3]
Byte [0]
Byte [1]
Byte [2]
Read: 8’d48
Write: 8’d32
DATAL
Read: 8’d80
Write: 8’d64
DATAL
DATAL from MCU when MCUIN = 1
DATAL from EEPROM when EEIN = 1
DATAL from Register when REGIN = 1
DATAH from MCU when MCUIN = 1
DATAH from EEPROM when EEIN = 1
DATAH from Register when REGIN = 1
DATAH
Register address (0, 1, 2, 3)
DATAH
EEPROM address (0 ~ 8’d63)
MCUIN
EEIN
High End 8CH DAC and 2CH ADC Integrated Solution
REGIN HEADPON
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CM106-F+/L+
Version： 1.01
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