MMA7455L(2007) Просмотр технического описания (PDF) - Freescale Semiconductor

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MMA7455L
(Rev.:2007)

±2g/±4g/±8g Three Axis Low-g Digital Output Accelerometer

Freescale Semiconductor 

BASIC CONNECTIONS

Pin Descriptions

Top View

INT1/DRDY

INT2

N/C

Reserved

SDO

SDA/SDI/SDO

AVdd

GND

IADDR0

N/C

GND

DVdd_IO

Figure 14. Pinout Description

PIN DESCRIPTIONS

1 DVDD_IO Digital Power for I/O pads

Input

2

GND

Ground

Input

3

N/C

No Connection or Connect to

Ground

4

IADDR0 I2C Address Bit 0

5

GND

Ground (optional)

Input

Input

Input

6

AVDD

Analog Power

Input

7

CS

SPI Enable (0), I2C Enable (1)

Input

8

INT1/

Interrupt 1/ Data Ready

Output

DRDY

9

INT2

Interrupt 2

Output

10

N/C

Rev 1: No Connection or Ground Input

11 Reserved Ground

Input

12

SDO

SPI Serial Data Output

Output

13 SD(A/I/O) I2C Serial Data (SDA), SPI Serial Open

Data Input (SDI), 3-wire interface Drain/

Serial Data Output (SDO)

Input/

Output

14 SCL/SPC I2C Serial Clock (SCL), SPI Serial Input

Clock (SPC)

Recommended PCB Layout for Interfacing Accelerometer to Microcontroller

Address set bit (bit 0)

Vdd

10uF

0.1uF

GND

10uF

0.1uF

Vdd_IO

Vdd

1R0k1?

Vdd

SCL

MCU

1R0k2?

SDA

INT2

INT1/DRDY

Figure 15. I2C Connection to MCU

MMA7455L

12

Sensors

Freescale Semiconductor

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