CM6502B Datasheet, PDF (33/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
7.8.3 I2C Slave Mode
Slave Mode Architecture
“7-bit slave address = 7’b0001000 to 7’b0001011”
CM6502 / CM6502B can serves as a slave device with bit rate up to 400Kbps (fast mode).
External MCU can write data to CM6502 / CM6502B or read data from CM6502 / CM6502B
(No Size limitation in I2C Interface). Since host side and MCU can both access to all the
internal registers.
CM6502 / CM6502B will transfer an interrupt to internal MCU until the INT bit of I2C
control Register have been clean by internal MCU. The interrupt will be trigger when write
transaction done or detect read-slave-address.
The main usage of 2-wire slave bus is to become the interface between the CM6502 / CM6502B and a
external micro control unit (EMCU).
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