MPU-6000 and MPU-6050 Product Specification Revision 1.0

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MPU-6000/MPU-6050 Product SpecificationDocument Number: PS-MPU-6000A-00Revision: 1.0Release Date: 11/24/201010.5 SPI Interface (MPU-6000 only)SPI is a 4-wire synchronous serial interface that uses two control and two data lines. The MPU-6000 alwaysoperates as a Slave device during standard Master-Slave SPI operation. With respect to the Master, theSerial Clock output (SCLK), the Data Output (SDO) and the Data Input (SDI) are shared among the Slavedevices. The Master generates an independent Chip Select (/CS) for each Slave device; /CS goes low at thestart of transmission and goes back high at the end. The Serial Data Output (SDO) line remains in a highimpedance(high-z) state when the device is not selected so it does not interfere with any active devices.SPI Operational Features1. Data is delivered MSB first and LSB last2. Data is latched on rising edge of SCLK3. Data should be transitioned on the falling edge of SCLK4. SCLK frequency is 1MHz max5. SPI read and write operations are completed in 16 or more clock cycles (two or more bytes). Thefirst byte contains the SPI Address, and the following byte(s) contain(s) the SPI data. The firstbit of the first byte contains the Read/Write bit and indicates the Read (1) or Write (0) operation.The following 7 bits contain the Register Address. In cases of multiple-byte Read/Writes, data istwo or more bytes:SPI Address formatMSBLSBR/W A6 A5 A4 A3 A2 A1 A0SPI Data formatMSB6. Supports Single or Burst Read/Writes.LSBD7 D6 D5 D4 D3 D2 D1 D0SCLKSDISPI Master SDO SPI Slave 1/CS1/CS/CS2SCLKSDISDO/CSSPI Slave 2Typical SPI Master / Slave ConfigurationEach SPI slave requires its own Chip Select (/CS) line. SDO, SDI and SCLK lines are shared. Only one /CSline is active (low) at a time ensuring that only one slave is selected at a time. The /CS lines of other slavesare held high which causes their respective SDO pins to be high-Z.CONFIDENTIAL & PROPRIETARY 36 of 53
MPU-6000/MPU-6050 Product SpecificationDocument Number: PS-MPU-6000A-00Revision: 1.0Release Date: 11/24/201011 Serial Interface Considerations (MPU-6050)11.1 MPU-6050 Supported InterfacesThe MPU-6050 supports I 2 C communications on both its primary (microprocessor) serial interface and itsauxiliary interface.11.2 Logic LevelsThe MPU-6050 I/O logic levels are set to be either VDD or VLOGIC, as shown in the table below.I/O Logic Levels vs. AUX_VDDIOAUX_VDDIOMICROPROCESSOR LOGIC LEVELS(Pins: SDA, SCL, AD0, CLKIN, INT)AUXILLARY LOGIC LEVELS(Pins: AUX_DA, AUX_CL)0 VLOGIC VLOGIC1 VLOGIC VDDNote: The power-on-reset value for AUX_VDDIO is 0.VLOGIC may be set to be equal to VDD or to another voltage, such that at all times VLOGIC is ≤ VDD.When AUX_VDDIO is set to 0 (its power-on-reset value), VLOGIC is the power supply voltage for both themicroprocessor system bus and the auxiliary I 2 C bus, as shown in the figure of Section 10.2.1. WhenAUX_VDDIO is set to 1, VLOGIC is the power supply voltage for the microprocessor system bus and VDD isthe supply for the auxiliary I 2 C bus, as shown in the figure of Section 10.2.2.CONFIDENTIAL & PROPRIETARY 37 of 53
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MPU-6000 and MPU-6050 Product Specification Revision 1.0

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