MMA7455LT Freescale Semiconductor, MMA7455LT Datasheet - Page 17

• Manufacturer Part Number: MMA7455LT
• Description: Board Mount Accelerometers 3-AXIS DIGITAL 2 4 8G
• Manufacturer: Freescale Semiconductor

Specifications of MMA7455LT

• Sensing Axis: X, Y, Z
• Acceleration: 2 g, 4 g, 8 g
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.4 V
• Supply Current: 400 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Sensitivity: 64 LSB/g
• Package / Case: LGA-14
• Output Type: Digital
• Acceleration Range: ± 2g, ± 4g, ± 8g
• No. Of Axes: 3
• Sensor Case Style: LGA
• No. Of Pins: 14
• Supply Voltage Range: 2.4V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Ic Interface Type: I2C, SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SINGLE BYTE WRITE
To start a write command, the Master transmits a start condition (ST) to the MMA7455L, slave address ($1D) with the R/W bit set
to “0” for a write, the MMA7455L sends an acknowledgement. Then the Master (MCU) transmits the 8-bit address of the register
to write to, and the MMA7455L sends an acknowledgement. Then the Master (or MCU) transmits the 8-bit data to write to the
designated register and the MMA7455L sends an acknowledgement that it has received the data. Since this transmission is com-
plete, the Master transmits a stop condition (SP) to the data transfer. The data sent to the MMA7455L is now stored in the ap-
propriate register. See
MULTIPLE BYTES WRITE
The MMA7455L automatically increments the received register address commands after a write command is received. Therefore,
after following the steps of a single byte write, multiple bytes of data can be written to sequential registers after each MMA7455L
acknowledgment (ACK) is received. See
Sensors
Freescale Semiconductor
Figure 10. Multiple Byte Writes - The Master (MCU) is writing to multiple sequential registers of the MMA7455L
Figure 8. Multiple Bytes Read - The Master is reading multiple sequential registers from the MMA7455L
Figure 9. Single Byte Write - The Master (MCU) is writing to a single register of the MMA7455L
Figure 7. Single Byte Read - The Master is reading one address from the MMA7455L
Figure
9.
Figure
10.
MMA7455L
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