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參數(shù)資料
| 型號： | LM8342SD |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | Programmable TFT VCOM Calibrator with Non-Volatile |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, DSO10 |
| 封裝： | LLP-10 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 951K |
| 代理商： | LM8342SD |
Application Section
(Continued)
The timing diagram shows the major aspect of the commu-
nication protocol and represents a typical data stream. In
case a master wants to setup a data transfer, it tests if “the
bus is busy.” If it is not busy, then the master starts the data
transfer by creating a “start data transfer” situation. Accord-
ingly the corresponding receiver is selected by sending the
appropriate “slave address.” This receiver gives an “ac-
knowledge” on recognizing its address on the bus. The
master continues the data transfer by sending the data
stream. Again the receiver gives an “acknowledge” after
receipt. Depending on the amount of data the master will
continue or create a “stop data transfer” situation.
Table 2
gives a more detailed description of the I
2
C compatible
communication.
TABLE 2. Detailed Description of I
2
C compatible
Communication Definitions
Bus not busy
The I
2
C compatible bus is not busy
when both data (SDA) and clock
(SCL) lines remain HIGH. The
controller can initiate data transfer
only when the bus is not busy.
Starting from an idle state (bus not
busy) a START condition consists
of a HIGH to LOW transition of
SDA while SCL is HIGH. All
commands must start with a START
condition.
After generating a start condition,
the master transmits a 7-bit slave
address. (The LM8342 uses the 8th
bit for selecting the R/W operation,
but this does not affect the
address.) The address for the
LM8342 is 9E
HEX
.
If the value of the R/W bit is HIGH,
the data is read from the register of
the LM8342. Otherwise the current
DAC setting is written to the
LM8342.
Start Data Transfer
Slave address
R/W-bit
Acknowledge
A receive device, when addressed,
is obliged to generate an
“acknowledge” after the reception of
each byte. The master generates
an extra clock cycle that is
associated with this acknowledge
bit. The receiver has to pull down
the SDA line during the
acknowledge clock pulse so that
the SDA line is stable LOW during
the HIGH period of SCL, with
respect to the SCL timing
specifications.
A data byte consists of 8 bits. 7 bits
are used for the DAC setting of the
LM8342. The 8th bit is known as
the P-bit.
The function of the P-bit depends
on the Read/Write operation
(R/W-bit). During a Read operation
of the LM8342, the P-bit indicates
the programming state of the
EEPROM. During a Write operation,
the register or both the register and
the EEPROM of the LM8342 can
be selected as destination. A more
detailed description of the P-bit is
given in
Table 3
.
A STOP condition consists of a
LOW to HIGH transition of SDA
while SCL is HIGH. All operations
must be ended with a STOP
condition.
Data byte
P-bit
Stop Data Transfer
20139204
FIGURE 6. Timing Diagram
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM8342SD/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM8342SDX | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM8342SDX/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM8360 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM8361 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:P-MOS LSI LM8361 |
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