參數(shù)資料
型號(hào)： AK4140VF
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： Digital BTSC Decoder
中文描述： 數(shù)字BTSC解碼器
文件頁數(shù)： 31/43頁
文件大小： 538K
代理商： AK4140VF
ASAHI KASEI
[AK4140]
Control Interface (I
2
C-bus)
AK4140 supports a fast-mode I
2
C-bus system (max : 400kHz).
1. Data transfer
All commands are preceded by a START condition. After the START condition, a slave address is sent. After the
AK4140 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
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 change when the clock signal on the SCL line is LOW except for the START and the STOP condition.
SCL
SDA
DATA LINE
STABLE :
DATA VALID
CHANGE
OF DATA
ALLOWED
Figure 16. Data transfer
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.
SCL
SDA
STOP CONDITION
START CONDITION
Figure 17. START and STOP conditions
MS0547-E-01
2007/03
- 31 -
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