MMA7456L Просмотр технического описания (PDF) - Freescale Semiconductor

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Компоненты Описание

производитель

MMA7456L

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

Freescale Semiconductor 

BASIC CONNECTIONS

Pin Descriptions

Top View

INT1/DRDY

INT2

N/C

N/C

SDO

SDA/SDI/SDO

AVDD

GND

IADDR0

N/C

GND

DVDD_IO

Figure 14. Pinout Description

Table 8. Pin Descriptions

Pin # Pin Name

Description

1 DVDD_IO Digital Power for I/O pads

Pin

Status

Input

2

GND

Ground

Input

3

N/C

No internal connection. Leave

Input

unconnected or connect to Ground.

4

IADDR0 I2C Address Bit 0

Input

5

GND

Ground

Input

6

AVDD Analog Power

Input

7

CS

SPI Enable (0), I2C Enable (1)

8 INT1/DRDY Interrupt 1/ Data Ready

Input

Output

9

INT2

Interrupt 2

Output

10

N/C

No internal connection. Leave

Input

unconnected or connect to Ground.

11

N/C

No internal connection. Leave

Input

unconnected or connect to Ground.

12

SDO

SPI Serial Data Output

Output

13 SDA/SDI/SDO I2C Serial Data (SDA), SPI Serial

Data Input (SDI), 3-wire interface

Serial Data Output (SDO)

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

Clock (SPC)

Open

Drain/

Input/

Output

Input

Recommended PCB Layout for Interfacing Accelerometer to Microcontroller

Address set bit (bit 0)

VVdDdD

10uF

0.1uF

GND

10uF

0.1uF

VVddD_DIO

VdDdD

1R0k1?

VdDdD

SCL

MCU

1R0k2?

SDA

INT2

INT1/DRDY

Sensors

Freescale Semiconductor

Figure 15. I2C Connection to MCU

MMA7456L

19

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