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MMA8491Q Datasheet(PDF) 5 Page - Freescale Semiconductor, Inc

Part No. MMA8491Q
Description  Xtrinsic MMA8491Q 3-Axis Multifunction Digital Accelerometer
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MMA8491Q Datasheet(HTML) 5 Page - Freescale Semiconductor, Inc

 
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MMA8491Q
Sensors
Freescale Semiconductor, Inc.
5
1.4
Pin descriptions
MMA8491Q is hosted in a 12-pin 3 mm x 3 mm QFN package. Ten pins are used for functions; two pins are unconnected. Refer
to Table 1 for complete pin descriptions and functions.
Figure 4. Pin connections (top view)
Table 1. Pin descriptions
Pin #
Pin Name
Function
Description
Pin Status
1Byp
Internal regulator output
capacitor connection
The internal regulator voltage of 1.8V is present on this pin. Connect to
external 0.1
μF bypass capacitor.
Output
2VDD
Power Supply
Device power is supplied through the VDD line. Power supply
decoupling capacitors should be placed as near as possible to pin 1 of
the device.
Input
3SDA
I2C Data
I2C Slave Data Line
•7-bit I2C device address is 0x55.
• The SDA and SCL I2C connections are open drain, and therefore
usually require a pullup resistor
Input/Output
4EN
Enable Pin
The Enable pin fully turns on the accelerometer system when it is
pulled up to logic high. The accelerometer system is turned off when
the Enable pin is logic low.
Input
5SCL
I2C Clock
I2C Slave Clock Line
Input
6Gnd
Ground
Ground
7Gnd
Ground
Ground
8
Zout
Push-pull Z-Axis Tilt Detection
Output
• Output is high when acceleration is > 0.688g (axis is |
φ| > 45°).
• Output is low when acceleration is
≤ 0.688g (axis is |φ| ≤ 45°).
These pins are push-pull.
Output
9
Yout
Push-pull Y-Axis Tilt Detection
Output
Output
10
Xout
Push-pull X-Axis Tilt Detection
Output
Output
11
NC
No internal connection
12
NC
No internal connection
1
2
3
4
10
9
8
7
Xout
Yout
Zout
Gnd
Byp
VDD
SDA
EN
56
12
11
SCL
Gnd
NC
NC


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