CM6308 C-Media Electronics, Inc., CM6308 Datasheet - Page 19

• Manufacturer Part Number: CM6308
• Description: Cm6308 Usb Audio Chip Specification
• Manufacturer: C-Media Electronics, Inc.

Date: 09/04/2007
The figure below shows a complete data transfer. After a START, the MCU should send 7-bit
slave address (7’b0111000) first, and then the 8th bit denotes a read transfer when it’s high; or
a write transfer when it’s low. The first acknowledgement always comes from the CM6308.
In the write transfer, the MCU continues to act as the master and the transfer direction is not
changed. The following figure gives an example of a write transfer.
SDAT
SCLK
START or Repeated
START Condition
or
Sr
S
MSB
1
2
Data Transfer on the MCU Interface
7
Signal from Receiver
8
Acknowledgement
ACK
-
9
19/42 -
1
Audio and Voice Applications
2
Single-Chip USB Solution for
3 - 8
Signal from Receiver
Acknowledgment
ACK
9
STOP or Repeated
START Condition
CM6308
Version:
Sr
Sr
or
P
P