Keyboard Interface; Accelerometer - Nokia 500 Service Manual

RM-750
System Module

Keyboard interface

MENU key (Home key), Volume-up and Volume-down key, Lock key, Send key and Camera Capture key are
directly connected to RAPU BB ASIC.

Accelerometer

Accelerometer is a geometric type component which can be configured either to generate an inertial wake-
up interrupt signal when a programmable acceleration threshold is exceeded along one of the three axes (x,
y, and z), or to detect a free-fall event. Each axis has its own sensor and those can measure positive and
negative directions.
The 3D accelerometer (N6502) Ahti_A sensor is connected to RAPU via two GENIOs ie Genio12 and Genio44
and I2C_0 bus. Power supply voltage is provided from VIO & VAUX2 output of EM ASIC.
It has the following features:
• 2.16V to 3.6V supply voltage
• 1.8V compatible IOs
• Low power consumption
• ±2g/±8g dynamically selectable scale
• I
2
C/SPI digital output interface
• Embedded self test
• 10000g high shock survivability
• Pb free/RoHS compliancy
Figure 31 Accelerometer
Issue 1 COMPANY CONFIDENTIAL Page 6 – 23
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