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參數(shù)資料
| 型號： | TS4956 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Stereo audio amplifier system with I2C bus interface |
| 中文描述： | 立體聲與I2C總線接口，音頻放大器系統(tǒng) |
| 文件頁數(shù)： | 5/51頁 |
| 文件大?。?/td> | 1506K |
| 代理商： | TS4956 |
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TS4956
Typical application schematic
5/51
2.1
I
2
C interface
The TS4956 uses a serial bus, which conforms to the I2C protocol (the TS4956 must be
powered when it is connected to I2C bus), to control the chip’s functions via two wires: Clock
and Data.
The Clock line and the Data line are bidirectional (open-collector) with an external chip pull-
up resistor (typically 10 k
). The maximum clock frequency in fast-mode specified by the I2C
standard is 400kHz, 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 I
2
C interface. The voltage
connected to this pin must be equal or less than the TS4956 power supply voltage V
CC
. The
minimum value of the I2CVCC voltage is 2.7V.
When the I2CVCC pin is connected to an I
2
C voltage, the TS4956 is ready to communicate
via the I
2
C 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 I
2
C command from the I
2
C bus.
In both cases, pins SDA and SCL must respect logic HI or logic LOW thresholds (not
floating) presented in
Table 3 on page 2
, in order for the circuit to function properly.
Table on page 5
summarizes the pin descriptions for the I2C bus interface.
Table 5.
2.1.1
I2C 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.
The 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 I2C 7-bit slave address and with the R/W bit set low
send the data (control register setting)
●
●
All bytes are sent with MSB bit first. The transfer of written data ends with a “stop” message.
When transmitting several data, the data can be written with no need to repeat the “start”
message and addressing byte with the slave address.
I2C bus interface: pin descriptions
Pin
Functional description
SDA
This is the serial data pin
SCL
This is the clock input pin
I2CVCC
I
2
C interface power supply
A6
A5
A4
A3
A2
A1
A0
Rw
1
0
1
1
1
0
1
X
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS4956EIJT | Stereo audio amplifier system with I2C bus interface |
| TS4962 | 3W Filter-free Class D Audio Power Amplifier |
| TS4962EIJT | 3W Filter-free Class D Audio Power Amplifier |
| TS4962EKIJT | 3W Filter-free Class D Audio Power Amplifier |
| TS4962IJT | 3W Filter-free Class D Audio Power Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS4956EIJT | 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| 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(fēng)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(fēng)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 |
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