ak4145 AKM Semiconductor, Inc., ak4145 Datasheet - Page 16

• Manufacturer Part Number: ak4145
• Description: Digital Stereo Btsc Encoder
• Manufacturer: AKM Semiconductor, Inc.

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The AK4145 supports the fast-mode I
1. Data transfer
All commands are preceded by a START condition. After the START condition, a slave address is sent. After the
AK4145 recognizes the START condition, the device interfaced to the bus waits for the slave address to be transmitted
over the SDA line. If the transmitted slave address matches an address for one of the devices, the designated slave device
(receiver) pulls the SDA line to LOW (ACKNOWLEDGE). The data transfer is always terminated by a STOP condition
generated by the master device.
1-1. Data validity
The data on the SDA line must be stable during the HIGH period of the clock. The HIGH or LOW state of the data line
can only be changed when the clock signal on the SCL line is LOW except for the START and the STOP condition.
1-2. START and STOP condition
A HIGH to LOW transition on the SDA line while SCL is HIGH indicates a START condition. All sequences start from
the START condition. A LOW to HIGH transition on the SDA line while SCL is HIGH defines a STOP condition. All
sequences end by the STOP condition.
Rev. 0.3
Serial Control Interface
SCL
SDA
SCL
SDA
START CONDITION
2
C-bus system (max: 400kHz).
Figure 8. START and STOP conditions
DATA VALID
DATA LINE
STABLE :
Figure 7. Data transfer
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CHANGE
OF DATA
ALLOWED
STOP CONDITION
[AK4145]
2007/11