V1.0 Page 32 of 38 ICM MP CC ST
A35-A36-A40 Company Confidential 09/01
8. MMI-Functions
8.1 Acoustics Notes
Electro-Acoustic components are: a) VIBRA
b) Microphone
c) Loudspeaker
8.1.1 VIBRA
The VIBRA is activated and controlled from the EGOLD+(Miscellaneous E10)
via the signal, VIBRA_ON. For this the VIBRA is connected to XG230 with BATT+.
GND is given by the shielding of the RF-Part. With a “H” of the VIBRA_ON signal
the transistor V230 is switched on. The signal VIBRA_ON appears also at the
EGOLD+(Miscellaneous M6). This “second” VIBRA_ON is only used for ~40 to 65ms
due to a higher voltage required from the VIBRA in the beginning. The diode V231
is used to protect the circuit against over voltage and switching spikes.
timing of VIBRA_ON signal
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