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RM-25
System module
System module block diagram
The main board, 1FSA, consists of a radio frequency part and a baseband part. The User Interface parts are
mainly situated at the UI flex, 1FSE, and the Top UI part, 1FSF. The UI flex is connected to the main board through
a connector. The Top UI part is connected to the main board through the Hinge Flex part, 1FSD.
The 1FSA is the system module of the RM-25 phone.
The RM-25 has IrDA and Bluetooth wireless local interfaces. It features a full function PopPort
The port includes stereo audio interface and ACI bus support. The HW will communicate with ACI accessories.
The SW may not support all ACI accessories.
TM
The PopPort
supports USB but does not support FBUS.
The implementation of the ACI bus in RM-25 has been made possible by implementing the BSI, Battery Size
Indication, a little different from most Nokia phones.
Functional description
The heart of the BB is UPP_WD2, which includes the MCU, DSP and Digital Control Logic. Power is supplied by the
UEME ASIC and a number of discrete regulators. Memory comprises of 2 x 128Mbit Stacked and 64Mbit flash
memory devices and 128 Mbit (16 Mbytes) SDRAM.
There are two audio transducers (earpiece 8 mm and IHF speaker 16 mm) and external galvanic headset
TM
(PopPort
) interface. The IHF speaker is also used to handle the ring tone. The IHF speaker is driven by a discrete
audio amplifier. In RM-25, there is only one microphone for both HS and IHF modes.
For data connectivity there is USB v2.0 full-speed, Bluetooth and RS-MMC card.
9235618 (Issue 2)
Figure 160 Module block diagram
Company Confidential
Copyright ©2005 Nokia. All Rights Reserved.
Nokia Customer Care
TM
implementation.
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