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| 型号： | AT73C240C |
| 厂商： | Atmel |
| 文件页数： | 14/38页 |
| 文件大小： | 0K |
| 描述： | IC NGD MONOLITHIC NUMERIC 32-QFN |
| 标准包装： | 6,000 |
| 应用： | 手持/移动设备 |
| 电流 - 电源： | 6mA |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 托盘 |
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9. TWI Interface
9.1
TWI Architecture
The two-wire interface interconnects components on a unique two-wire bus, made up of one
clock line and one data line with speeds up to 400 Kbits per second, based on a byte oriented
transfer format. The TWI is slave only and has single byte access.
The TWI adds flexibility to the power supply solution, enabling LDO regulator and Audio func-
tionnalities and paths to be controlled depending on the instantaneous application requirements.
The AT73C240 has the following 7-bit address: 1001000 .
Attempting to read data from register addresses not listed in this section results in 0xFF being
read out.
? TWCK is an input pin for the clock
? TWD is an open-drain pin driving or receiving the serial data
The data put on TWD line must be 8 bits long. Data is transferred MSB first. Each byte must be
followed by an acknowledgement.
Each transfer begins with a START condition and terminates with a STOP condition.
? A high-to-low transition on TWD while TWCK is high defines a START condition.
? A low-to-high transition on TWD while TWCK is high defines a STOP condition..
Figure 9-1.
TWI Start and Stop conditions
TWD
TWCK
S t a rt
S top
Figure 9-2.
TWI transfert format
TWD
TWCK
S t a rt
Addre ss
R/W
Ack
D a t a
Ack
D a t a
Ack
S top
After the host initiates a START condition, it sends the 7-bit slave address defined above to
notify the slave device. A read/write bit follows (read = 1, write = 0).
The device acknowledges each received byte. The first byte sent after the device address and
the R/W bit, is the address of the device register the host wants to read or write.
For a write operation the data follows the internal address. For a read operation a repeated
START condition needs to be generated followed by a read on the device.
14
AT73C240
6464A–PMAAC–28-Apr-09
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT73C240-EK1 | 功能描述:音频 IC 开发工具 AT73C240 EVALUATION KIT RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| AT73C246 | 功能描述:多媒体杂项 NGD MONOLITHIC NUMERIC IC RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| AT73C246-EK1 | 功能描述:电源管理IC开发工具 COMPLETE EVALUATION KIT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| AT73C260B | 功能描述:多媒体杂项 NGD MONOLITHIC NUMERIC IC RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| AT73C500 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Chip Set Solution for Watt-Hour Meters |
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