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Parallel to this pin of the UEME is connected the Test/Flash pad BSI_PULS used when the phone is flashed.
The BSI connection of the battery, BSI_BATT pad of the Flsh/Test interface, is connected to the LS/ALCO AD input
of the UEME. Via this AD converter the Battery Size Indication resistor value is determined.
The BSI connection of the battery is also connected to the SIMCardDet input of the UEME. When the BSI of the
battery is disconnected the UEME will close the SIM bus down immediately, in a well-controlled manner.
Audio concept
RM-25 audio includes an earpiece, a microphone, and a Pop-Port
TM
connector for headset and integrated
handsfree (IHF). Audio is based on ASIC's UPP_WD2, UEME and a discrete amplifier for the handsfree speaker
known as “boomer”.
Figure 162 RM-25 audio blocks
Between UPP_WD2 and UEME, the audio signals are transferred in digital format using signals MICDATA and
EARDATA. Ringing tones and warning/info tones are to be produced to the IHF speaker.
RM-25
Nokia Customer Care
System module
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Company Confidential
9235618 (Issue 2)
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