參數(shù)資料
型號： TS4956EIJT
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 1.055 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA18
封裝： ROHS COMPLIANT, FCP-18
文件頁數(shù)： 53/55頁
文件大?。?/td> 1711K
代理商： TS4956EIJT
TS4956
Typical application schematic
7/55
2.1
I2C interface
The TS4956 uses a serial bus, which conforms to the I2C protocol (the TS4956 must be
powered when it is connected to the I2C bus), to control the chip’s functions via two wires:
clock and data.
The clock and data lines are bidirectional (open-collector) with an external chip pull-up
resistor (typically 10 k
Ω). The maximum clock frequency in fast-mode specified by the I2C
standard is 400 kHz, and this frequency is supported by the TS4956. In this application, the
TS4956 is always the slave device and the controlling MCU is the master device.
The I2CVCC pin determines the power supply of the TS4956’s I2C interface. The voltage
connected to this pin must be equal to or less than the TS4956 power supply voltage VCC.
The minimum value of the I2CVCC voltage is 2.7 V.
When the I2CVCC pin is connected to an I2C voltage, the TS4956 is ready to communicate
via the I2C bus.
When the I2CVCC pin is connected to the ground, the TS4956 is in total standby mode, with
an ultra-low standby current on the order of a few nanoamperes. In this condition the
TS4956 cannot receive I2C commands from the I2C bus.
In both cases, pins SDA and SCL must respect logic HI or logic LOW thresholds (not
floating) presented in Table 3 on page 4, in order for the circuit to function properly.
Table 5 summarizes the pin descriptions for the IC bus interface.
2.1.1
IC operation description
The host MCU can write into the TS4946 control register to control the TS4956 and read
from the control register to get the current configuration of the TS4956. The TS4956 is
addressed by a single byte consisting of a 7-bit slave address and an R/W bit. The TS4956
control register address is $5Dh.
Table 6.
First byte after the START message for addressing the device
In order to write data into the TS4956 control register, after the "start" message the MCU
must send the following data:
●
send byte with the IC 7-bit slave address and with the R/W bit set low.
●
send the data (control register setting).
All bytes are sent with the MSB bit first. The transfer of written data ends with a "stop"
message. When transmitting several bits of data, the data can be written without having to
repeat the "start" message or address byte with the slave address.
Table 5.
IC bus interface: pin descriptions
Pin
Functional description
SDA
Serial data pin
SCL
Clock input pin
I2CVCC
I2C interface power supply
A6
A5
A4
A3
A2
A1
A0
Rw
101
1
0
1
X
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS4956EIKJT 功能描述:音頻放大器 Stereo Audio Amp System RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4961TIQT 功能描述:音頻放大器 MONO CLASS D AUDIO PWR AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4962 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.8W filter-free mono class D audio power amplifier
TS4962_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.8W filter-free mono class D audio power amplifier
TS4962_10 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.8 W filter-free mono class D audio power amplifier
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