CM6571 Datasheet, PDF (34/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

8.5.1.2 I2C-master read with clk_sync mode
CM6571
USB Audio Sound Chip
8.5.2 I2C slave mode
8.5.2.1 slave mode architecture
“7-bit slave address = 7’b0001000 to 7’b0001011”
The CM6571 can serve as a slave device with a bit rate of up to 400Kbps (in fast mode). An external MCU can write data
to or read from the CM6571 with no size limitation in the I2C Interface. Furthermore, both the host side and the MCU
have access to all the internal registers.
The CM6571 will transfer an interrupt to the internal MCU until the INT bit of the I2C control register has been cleared
by the internal MCU. The interrupt is triggered when a write transaction is done, or when a slave address read is
detected.
The main function of the two-wire slave bus is to be in the interface between the CM6571 and an external micro control
unit (EMCU).
Revised: Nov. 2012
Page 34 / 63
www.cmedia.com.tw
Copyright© C-Media Electronics Inc.