Phone description
Introduction
This chapter describes the system module including engine, power management, interfaces, audio etc.
The baseband is based on BB5.0 with a RAPGSM main processor and Retu/Tahvo energy management. All
blocks that require high voltage process are in Tahvo and all other in Retu. The RF part is based on the ASIC
Ahne.
RM-237 is a monoblock phone, in which all electrical components are assembled into one PWB.
RM-237 operates on the GSM 900/1800/1900 bands.
Key components
Function Name Item
Energy management Retu
Tahvo
D2200
N2300
Main processor RAPGSM D2800
Memory Combo: 128 Mbit SDRAM & 256 Mbit NOR flash D3000
RF ASIC Ahne N7505
Front end module Power amplifier and Antenna Switch N7520
Antenna Antenna module assembly
RM-237: 900/1800/1900MHz
System connector AV connector
mini USB connector
X2030
X2002
Battery BL-5C, 3.7 V, 860 mAh
Bluetooth BC4-ROM N6030
FM radio TEA5760 N6100
IHF Speaker Donau or Aura (in antenna module assembly)
Earpiece RDF-07A 32OHM 10.86x7.40.2.2 B2101
Microphone Clapton B2100
Vibra SMD VIBRA MOTOR M2100
Charger connector 2 mm Nokia charger interface X2000
Camera 1.3Mpix Konica
HWA STV0984N D3300
Display SEID or AUO 128X160
LED driver TPS 61061 YZFR N2301
RTC battery 311 size G2200
RM-237
System module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –5
Copyright © 2007 Nokia. All rights reserved.
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