User Guide

CCS Technical Documentation System Module

RH-48

used to control average current going through LEDs. A step-up converter and a constant

current source is used to ensure that the LEDs provide uniform intensity and color.

Vibra

Introduction

Vibra is located on the D-cover and is connected by spring connectors on the PWB. It is

located in the bottom of the engine.

Interfaces

Vibra is controlled by pwm signal VIBRA from UEM. This signal allows control of both

frequency and pulse width of signal. Pulse width is used to control current when battery

voltage changes. Frequency control searches for optimum frequency to ensure silent and

efficient vibrating.

Audio Hardware

Earpiece

The 13 mm speaker capsule that is used in DCT3 products also is used in . The speaker is

dynamical—very sensitive, and capable of producing relatively high sound pressure at

low frequencies. The speaker capsule and surrounding mechanics comprise the earpiece.

Microphone

The microphone is an electric microphone with omnidirectional polar pattern. It consists

of an electrically polarized membrane and a metal electrode, which form a capacitor. Air

pressure changes (i.e., sound) move the membrane, which causes voltage changes across

the capacitor. Since the capacitance is typically 2 pF, a FET buffer is needed inside the

microphone capsule for the signal generated by the capacitor. The microphone needs

bias voltage as a result of the FET.

MIDI Speaker

Musical Instrument Digital Interface (MIDI) defines the data interchange format. By

implementing MIDI engine, enriched sound effect will be achieved, which includes: ring-

ing tones, UI event sounds, and music for games and entertainment.

Parameter Requirement Unit

Rated DC voltage 1.3 V

Rated speed 9500 ± 3000 rpm

Rated current 115 ± 20 mA

Starting current 150 ± 20 mA

Armature resistant 8.6 ohm

Rated DC voltage available 1.2 to 1.7 V

Starting DC voltage min 1.2 V