參數(shù)資料
型號(hào)： LIS3DH
廠商： STMICROELECTRONICS
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PBGA16
封裝： 3 X 3 MM, 1 MM HEIGHT, GREEN, PLASTIC, LGA-16
文件頁(yè)數(shù)： 14/42頁(yè)
文件大小： 689K
代理商： LIS3DH
LIS3DH
Digital interfaces
Doc ID 17530 Rev 1
21/42
6.1.1
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 LIS3DH is 001100xb. SDO/SA0 pad can be
used to modify less significant bit of the device address. If SA0 pad is connected to voltage
supply, LSb is ‘1’ (address 0011001b) else if SA0 pad is connected to ground, LSb value is
‘0’ (address 0011000b). This solution permits to connect and address two different
accelerometers 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
received.
The I2C embedded inside the LIS3DH behaves like a slave device and the following protocol
must be adhered to. After the start condition (ST) a slave address is sent, once a slave
acknowledge (SAK) has been returned, a 8-bit sub-address (SUB) 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 increased to allow
multiple data read/write.
The slave address is completed with a Read/Write bit. If the bit was ‘1’ (Read), a repeated
START (SR) condition must be issued after the two sub-address bytes; if the bit is ‘0’ (Write)
the Master transmit to the slave with direction unchanged. Table 12 explains how the
SAD+Read/Write bit pattern is composed, listing all the possible configurations.
Table 12.
SAD+Read/Write patterns
Command
SAD[6:1]
SAD[0] = SA0
R/W
SAD+R/W
Read
001100
0
1
00110001 (31h)
Write
001100
0
00110000 (30h)
Read
001100
1
00110011 (33h)
Write
001100
1
0
00110010 (32h)
Table 13.
Transfer when master is writing one byte to slave
Master
ST
SAD + W
SUB
DATA
SP
Slave
SAK
Table 14.
Transfer when master is writing multiple bytes to slave:
Master
ST
SAD + W
SUB
DATA
SP
Slave
SAK
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參數(shù)描述
LIS3DHHTR 功能描述:ACCELEROMETER 3-AXIS 16LGA 制造商:stmicroelectronics 系列:MEMS 零件狀態(tài):在售 類型:數(shù)字 軸:X，Y，Z 加速度范圍:±2.5g 靈敏度（LSB/g）:13157（±2.5g） 靈敏度（mV/g）:- 帶寬:235Hz ~ 440Hz 輸出類型:SPI 電壓 - 電源:1.71 V ~ 3.6 V 特性:溫度傳感器 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:16-LGA 供應(yīng)商器件封裝:16-CCLGA（5x5） 標(biāo)準(zhǔn)包裝:1
LIS3DHTR 功能描述:加速計(jì) - 板上安裝 MEMS Ultra Low-Power 3-Axes "Nano" RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C
LIS3DSH 功能描述:加速計(jì) - 板上安裝 MEMS 3-Axis Nano 1.71 to 3.6V 1.6kHz RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C
LIS3DSHTR 功能描述:加速計(jì) - 板上安裝 MEMS 3-Axis Nano 1.71 to 3.6V 1.6kHz RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C
LIS3L02AL 功能描述:加速計(jì) - 板上安裝 3-axis +/-2g Linear MEMS Intertial Sensr RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C
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