AK4687 AKM [Asahi Kasei Microsystems], AK4687 Datasheet - Page 24

• Manufacturer Part Number: AK4687
• Description: Asynchronous Stereo CODEC with Capless Stereo Selector
• Manufacturer: AKM [Asahi Kasei Microsystems]

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The AK4687 supports fast-mode I
1. Data Transfer
In order to access any IC devices on the I
includes the device address. IC devices on the BUS compare this slave address with their own addresses and the IC device
which has an identical address with the slave-address generates an acknowledgement. The IC device with the identical
address executes either a read or a write operation. After the command execution, input a stop condition.
1-1. Data Change
Change the data on the SDA line while SCL line is “L”. SDA line condition must be stable and fixed while the clock is
“H”. Change the Data line condition between “H” and “L” only when the clock signal on the SCL line is “L”. Change the
SDA line condition while SCL line is “H” only when the start condition or stop condition is input.
1-2. Start Condition and Stop Condition
A start condition is generated by the transition of “H” to “L” on the SDA line while the SCL line is “H”. All instructions
are initiated by a start condition. A stop condition is generated by the transition of “L” to “H” on SDA line while SCL line
is “H”. All instructions end by a stop condition.
MS1307-E-00
Serial Control Interface
SCL
SDA
SCL
SDA
START CONDITION
2
C-bus system (max: 400kHz).
Figure 12. START and STOP Conditions
2
C BUS, input a start condition first, followed by a single slave address which
DATA VALID
DATA LINE
STABLE :
Figure 11. Data Transfer
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CHANGE
OF DATA
ALLOWED
STOP CONDITION
[AK4687]
2011/05