Phone description
Introduction
This chapter describes the baseband 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-70/Nokia 7370 operates on the GSM900/1800/1900 bands.
The phone is a swivel phone, with one main part and one wing board. They are connected with a micro coax
cable harness.
Main board includes: BB and RF blocks, Bluetooth, FM radio, HWA, camera, etc.
Wing board includes: LCD display and earpiece
Characteristic components
Function Name Item
RF ASIC Ahne N7505
Energy management Retu
Tahvo
D2200
N2300
Main processor RAPGSM D2800
Memory Combo: 128 Mbit SDRAM & 256 Mbit NOR flash D3000
Power amplifier RF9282 N7520
Antenna
System connector PopPort X2001
Battery BL-4B, 3.7 V, 700 mAh, Li-ion
Swivel detection 2 Hall ICs and 2 permanent magnets
Bluetooth BC4-ROM N6030
FM radio TEA5761, single chip N6156
Stereo IHF Speaker 13mm ALE I202
Earpiece 7/11 B2101
Microphone I203
Vibra M2100
Charger connector 2 mm Nokia charger interface X2000
Camera 1.3 Mpix SMIA85, no flash light X3300
RM-70
System module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –5
Copyright © 2005 Nokia. All rights reserved.
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