MMA8652FC datasheet(20/65 Pages) NXP

20 / 65 page

MMA8652FC

Sensors

Freescale Semiconductor, Inc.

Figure 11. Multiple Byte Read timing (I2C)

5.11.3

Single byte write

To start a write command, the Master transmits a start condition (ST) to the MMA8652FC, slave address ($1D) with the

R/W bit set to “0” for a write,

The MMA8652FC sends an acknowledgement.

Next the Master (MCU) transmits the address of the register to write to, and the MMA8652FC sends an

acknowledgement.

Then the Master (or MCU) transmits the 8-bit data to write to the designated register, and the MMA8652FC sends an

acknowledgement that it has received the data. Because this transmission is complete, the Master transmits a stop

condition (SP) to the data transfer. The data sent to the MMA8652FC is now stored in the appropriate register.

Figure 12. Single Byte Write timing (I2C)

5.11.4

Multiple byte write

(See Table 11 for next auto-increment address.)

After a write command is received, the MMA8652FC automatically increments the received register address

commands.

Therefore, after following the steps of a single byte write, multiple bytes of data can be written to sequential registers

after each MMA8652FC acknowledgment (ACK) is received.

Figure 13. Multiple Byte Write timing (I2C)

Master

Device Address[7:1]

SR Device Address[7:1] R

Slave

Data[7:0]

Master

NAK

Slave

Data[7:0]

Master

ST Device Address[7:1]

Data[7:0]

Slave

Master

Device Address[7:1]

Data[7:0]

Slave

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