BASIC CONNECTIONS
Pin Descriptions
Top View
DVDD_IO
GND
N/C
IADDR0
GND
AVDD
SDA/SDI/SDO
SDO
N/C
N/C
INT2
INT1/DRDY
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
Figure 15. I2C Connection to MCU
Sensors
Freescale Semiconductor
MMA7455L
19