Accelerometer
The 3-dimensional accelerometer measures the static acceleration of gravity in tilt-sensing applications, as
well as dynamic acceleration resulting from motion or shock.
The features using accelerometer in RM-356 are:
•
Turn-to-mute (ringing tone & alarm)
•
UI auto rotate
•
Gaming control
The accelerometer (N6501) is connected to I2C. One GENIO is reserved for interrupt.
Figure 58 Accelerometer schematics
I/O Expander
I/O Expander is used for control signals that are not time critical, such as for keyboard inputs, enable & reset
signals etc. It is connected to the I2C bus, and has its own interrupt. PURX is used as I/O Expander’s reset. I/
O Expander is powered from VIO 1.8V.
RM-356
System Module and User Interface
Issue 1 COMPANY CONFIDENTIAL Page 6 –15
Copyright © 2008 Nokia. All rights reserved.
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