參數(shù)資料
型號(hào)： TDA7439
廠商： STMICROELECTRONICS
元件分類(lèi)： 音頻控制
英文描述： 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP30
封裝： 0.400 INCH, SDIP-30
文件頁(yè)數(shù)： 3/23頁(yè)
文件大?。?/td> 296K
代理商： TDA7439
TDA7439
I2C bus interface
11/23
4
I2C bus interface
Data transmission from the microprocessor to the TDA7439 and vice versa takes place
through the 2-wire I2C bus interface. This consists of the data and clock lines, SDA and SCL.
Pull-up resistors to the positive supply voltage must be used (there are no internal pull-ups).
4.1
Data validity
The data on the SDA line must be stable during the high period of the clock as shown in
Figure 12. SDA is allowed to change only when SCL is low.
4.2
Start and stop conditions
As shown in Figure 13 a start condition is a high to low transition of SDA while SCL is high.
The stop condition is a low to high transition of SDA while SCL is high.
4.3
Byte format
Every byte transferred on the SDA line must contain 8 bits. The MSB is transferred first.
There is also provision for an acknowledge bit to follow each byte to indicate that the data
has been received.
4.4
Acknowledge
The master (P) puts a resistive high level on SDA during the acknowledge clock pulse (see
Figure 14). The peripheral (audio processor) that acknowledges has to pull down (low) the
SDA line during this clock pulse.
The audio processor which has been addressed has to generate an acknowledge after the
reception of each byte, otherwise the SDA line remains at the high level during the ninth
clock pulse time. In this case the master transmitter can generate the STOP information in
order to abort the transfer.
4.5
Transmission without acknowledge
Suppressing the audio processor acknowledge detection enables the P to use a simpler
transmission: it simply waits for one clock, without checking the slave acknowledging, and
then sends the new data.
This approach has, of course, less protection from transmission errors.
相關(guān)PDF資料
PDF描述
TDA7440D 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
TDA7440D013TR 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
TDA7442D 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
TDA7442 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP32
TDA7442D013TR 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7439_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Three-band digitally-controlled audio processor
TDA7439B 功能描述:音頻 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TDA7439D 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR
TDA7439DS 功能描述:音頻 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TDA7439DS_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Three-band digitally-controlled audio processor
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