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参数资料
| 型号： | LIS35DETR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PBGA14 |
| 封装： | 3 X 5 MM, 0.92 MM HEIGHT, 0.80 MM PITCH, GREEN, PLASTIC, LGA-14 |
| 文件页数： | 10/39页 |
| 文件大小： | 650K |
| 代理商： | LIS35DETR |
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Digital interfaces
LIS35DE
18/39
Doc ID 15594 Rev 1
5.1.1
I2C operation
The transaction on the bus is started through a START (ST) signal. A START condition is
defined as a HIGH to LOW transition on the data line while the SCL line is held HIGH. After
this has been transmitted by the Master, the bus is considered busy. The next byte of data
transmitted after the start condition contains the address of the slave in the first 7 bits and
the eighth bit tells whether the Master is receiving data from the slave or transmitting data to
the slave. When an address is sent, each device in the system compares the first seven bits
after a start condition with its address. If they match, the device considers itself addressed
by the Master.
The Slave ADdress (SAD) associated to the LIS35DE is 001110xb. SDO pad can be used to
modify less significant bit of the device address. If SDO pad is connected to voltage supply
LSb is ‘1’ (address 0011101b) else if SDO pad is connected to ground LSb value is ‘0’
(address 0011100b). This solution permits to connect and address two different
accelerometer to the same I2C lines.
Data transfer with acknowledge is mandatory. The transmitter must release the SDA line
during the acknowledge pulse. The receiver must then pull the data line LOW so that it
remains stable low during the HIGH period of the acknowledge clock pulse. A receiver which
has been addressed is obliged to generate an acknowledge after each byte of data has
been received.
The I2C embedded inside the LIS35DE behaves like a slave device and the following
protocol must be adhered to. After the start condition (ST) a salve address is sent, once a
slave acknowledge (SAK) has been returned, a 8-bit sub-address is transmitted: the 7 LSb
represent the actual register address while the MSB enables address auto increment. If the
MSb of the SUB field is 1, the SUB (register address) is automatically incremented to allow
multiple data read/write.
The slave address is completed with a Read/Write bit. If the bit is ‘1’ (Read), a repeated
START (SR) condition must be issued after the two sub-address bytes; if the bit is ‘0’ (Write)
the Master will transmits to the slave with direction unchanged.
Table 10 explains how the
SAD+Read/Write bit pattern is composed, listing all the possible configurations.
Table 10.
SAD+Read/Write patterns
Command
SAD[6:1]
SAD[0] = SDO
R/W
SAD+R/W
Read
001110
0
1
00111001 (39h)
Write
001110
0
00111000 (38h)
Read
001110
1
00111011 (3Bh)
Write
001110
1
0
00111010 (3Ah)
Table 11.
Transfer when Master is writing one byte to slave
Master
ST
SAD + W
SUB
DATA
SP
Slave
SAK
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相关代理商/技术参数 |
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| LIS-3-6 | 制造商:TDK-Lambda Corporation 功能描述:15W AC To DC Switching Power Supply - 95-132V/187-265V in - 6V 2.5A out |
| LIS3DETR | 制造商:STMicroelectronics 功能描述: 制造商:STMicroelectronics 功能描述:SADA_MEMS digital output motion sensor, ultra low-power high performance 3-axes |
| LIS3DH | 功能描述:加速计 - 板上安装 MEMS Ultra Low-Power 3-Axes "Nano" RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| LIS3DHHTR | 功能描述:ACCELEROMETER 3-AXIS 16LGA 制造商:stmicroelectronics 系列:MEMS 零件状态:在售 类型:数字 轴:X，Y，Z 加速度范围:±2.5g 灵敏度（LSB/g）:13157（±2.5g） 灵敏度（mV/g）:- 带宽:235Hz ~ 440Hz 输出类型:SPI 电压 - 电源:1.71 V ~ 3.6 V 特性:温度传感器 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:16-LGA 供应商器件封装:16-CCLGA（5x5） 标准包装:1 |
| LIS3DHTR | 功能描述:加速计 - 板上安装 MEMS Ultra Low-Power 3-Axes "Nano" RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
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