MPU-6881数据手册 InvenSense-MPU-6881 datasheet

【实例简介】MPU-6881数据手册 InvenSense-MPU-6881 datasheet

【实例截图】

【核心代码】

TABLE OF CONTENTS
TABLE OF FIGURES ......................................................................................................................................... 4
TABLE OF TABLES .......................................................................................................................................... 5
1 DOCUMENT INFORMATION ...................................................................................................................... 6
1.1 R EVISION H ISTORY .............................................................................................................................. 6
1.2 P URPOSE AND S COPE .......................................................................................................................... 7
1.3 P RODUCT O VERVIEW ........................................................................................................................... 7
1.4 A PPLICATIONS ..................................................................................................................................... 7
2 FEATURES .................................................................................................................................................. 8
2.1 G YROSCOPE F EATURES ....................................................................................................................... 8
2.2 A CCELEROMETER F EATURES ............................................................................................................... 8
2.3 A DDITIONAL F EATURES ........................................................................................................................ 8
3 ELECTRICAL CHARACTERISTICS ........................................................................................................... 9
3.1 G YROSCOPE S PECIFICATIONS .............................................................................................................. 9
3.2 A CCELEROMETER S PECIFICATIONS ..................................................................................................... 10
3.3 E LECTRICAL S PECIFICATIONS ............................................................................................................. 11
3.4 I2C T IMING C HARACTERIZATION ......................................................................................................... 15
3.5 SPI T IMING C HARACTERIZATION ......................................................................................................... 16
3.6 A BSOLUTE M AXIMUM R ATINGS ........................................................................................................... 18
4 APPLICATIONS INFORMATION .............................................................................................................. 19
4.1 P IN O UT D IAGRAM AND S IGNAL D ESCRIPTION ..................................................................................... 19
4.2 T YPICAL O PERATING C IRCUIT ............................................................................................................. 20
4.3 B ILL OF M ATERIALS FOR E XTERNAL C OMPONENTS .............................................................................. 20
4.4 B LOCK D IAGRAM ............................................................................................................................... 21
4.5 O VERVIEW ........................................................................................................................................ 21
4.6 T HREE -A XIS MEMS G YROSCOPE WITH 16- BIT ADC S AND S IGNAL C ONDITIONING ................................ 22
4.7 T HREE -A XIS MEMS A CCELEROMETER WITH 16- BIT ADC S AND S IGNAL C ONDITIONING ........................ 22
4.8 I2C AND SPI S ERIAL C OMMUNICATIONS I NTERFACES .......................................................................... 22
4.9 S ELF -T EST ........................................................................................................................................ 24
4.10 C LOCKING ......................................................................................................................................... 25
4.11 S ENSOR D ATA R EGISTERS ................................................................................................................. 25
4.12 FIFO ................................................................................................................................................ 25
4.13 I NTERRUPTS ...................................................................................................................................... 25
4.14 D IGITAL -O UTPUT T EMPERATURE S ENSOR .......................................................................................... 25
MPU-6881 Product Specification
Document Number: PS-MPU-6881A-00
Revision: 1.0
Release Date: 05/22/2014
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4.15 B IAS AND LDO S ................................................................................................................................ 26
4.16 C HARGE P UMP .................................................................................................................................. 26
4.17 S TANDARD P OWER M ODES ................................................................................................................ 26
5 PROGRAMMABLE INTERRUPTS ............................................................................................................ 27
6 DIGITAL INTERFACE ............................................................................................................................... 28
6.1 I2C AND SPI S ERIAL I NTERFACES ...................................................................................................... 28
6.2 I2C I NTERFACE .................................................................................................................................. 28
6.3 I2C C OMMUNICATIONS P ROTOCOL ..................................................................................................... 28
6.4 I 2 C T ERMS ........................................................................................................................................ 31
6.5 SPI I NTERFACE ................................................................................................................................. 32
7 SERIAL INTERFACE CONSIDERATIONS ............................................................................................... 32
7.1 MPU-6881 S UPPORTED I NTERFACES ................................................................................................. 33
8 ASSEMBLY ............................................................................................................................................... 34
8.1 O RIENTATION OF A XES ...................................................................................................................... 34
8.2 P ACKAGE D IMENSIONS ...................................................................................................................... 35
9 PART NUMBER PACKAGE MARKING ................................................................................................... 36
10 RELIABILITY ............................................................................................................................................. 37
10.1 Q UALIFICATION T EST P OLICY ............................................................................................................. 37
10.2 Q UALIFICATION T EST P LAN ................................................................................................................ 37
11 REFERENCE ............................................................................................................................................. 38
MPU-6881 Product Specification
Document Number: PS-MPU-6881A-00
Revision: 1.0
Release Date: 05/22/2014
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Table of Figures
Figure 1 I2C Bus Timing Diagram .................................................................................................................... 15
Figure 2 SPI Bus Timing Diagram .................................................................................................................... 16
Figure 3 Pin out Diagram for MPU-6881 3.0x3.0x0.9mm QFN ........................................................................ 19
Figure 4 MPU-6881 QFN Application Schematic. (a) I2C operation, (b) SPI operation. ................................ 20
Figure 5 MPU-6881 Block Diagram .................................................................................................................. 21
Figure 6 MPU-6881 Solution Using I2C Interface ............................................................................................ 23
Figure 7 MPU-6881 Solution Using SPI Interface ............................................................................................ 24
Figure 8 START and STOP Conditions ............................................................................................................ 29
Figure 9 Acknowledge on the I 2 C Bus .............................................................................................................. 29
Figure 10 Complete I 2 C Data Transfer ............................................................................................................. 30
Figure 11 Typical SPI Master / Slave Configuration ......................................................................................... 32
Figure 12 I/O Levels and Connections ............................................................................................................. 33
Figure 13 Orientation of Axes Sensitivity and Polarity of Rotation ................................................................... 34
MPU-6881 Product Specification
Document Number: PS-MPU-6881A-00
Revision: 1.0
Release Date: 05/22/2014
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Table of Tables
Table 1 Gyroscope Specifications ...................................................................................................................... 9
Table 2 Accelerometer Specifications .............................................................................................................. 10
Table 3 D.C. Electrical Characteristics ............................................................................................................. 11
Table 4 A.C. Electrical Characteristics ............................................................................................................. 13
Table 5 Other Electrical Specifications ............................................................................................................. 14
Table 6 I 2 C Timing Characteristics ................................................................................................................... 15
Table 7 SPI Timing Characteristics .................................................................................................................. 16
Table 8 fCLK = 20MHz ..................................................................................................................................... 17
Table 9 Absolute Maximum Ratings ................................................................................................................. 18
Table 10 Signal Descriptions ............................................................................................................................ 19
Table 11 Bill of Materials .................................................................................................................................. 20
Table 12 Standard Power Modes for MPU-6881.............................................................................................. 26
Table 13 Table of Interrupt Sources ................................................................................................................. 27
Table 14 Serial Interface ................................................................................................................................... 28
Table 15 I 2 C Terms ........................................................................................................................................... 31