User Guide

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8 — System Module

Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 8 –1

Summary of content (30 pages)

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RM-88 System Module Nokia Customer Care Table of Contents Baseband description............................................................................................................................................8–5 System module block diagram........................................................................................................................8–5 Baseband functional description..........................................................................................................
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RM-88 System Module Nokia Customer Care List of Tables Table 14 Battery interface connections.............................................................................................................8–15 Table 15 ALS resistor values................................................................................................................................8–16 Table 16 Charging interface connections.......................................................................................................
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RM-88 System Module Nokia Customer Care Baseband description System module block diagram The device is a quad-band GSM mono-block product with full QWERTY keyboard. It is based on Series 60 UI Style on the Symbian Operating System (SOS) release (version 9.1). The device has two antennas; Internal antenna for cellular quad band GSM and BT antenna. Bluetooth module has its own antenna. System calculations assume 15dB antenna isolation between Bluetooth and cellular GSM antenna.
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RM-88 System Module Nokia Customer Care Figure 52 System level block diagram Baseband functional description Digital baseband is single processor architecture. It consists of RAP, EM ASIC (N2200), EM ASIC (N2300) and memories as the core. RAP is a GSM EDGE chip with lots of peripheral features. Supported cellular protocols in RAP are GSM (minimum EDGE class 10, GPRS phase2). In general RAP consists of three separate parts.
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RM-88 System Module Nokia Customer Care Signal Min Nom Max Uni t Battery voltage (Call) +3.2 +4.8 V Charger input voltage -0.3 +16 V Notes Battery voltage maximum value is specified during charging is active Phone modes of operation Mode Description NO_SUPPLY (dead) mode means that the main battery is not present or its voltage is too low (below N2200 master reset threshold) and that the back-up battery voltage is too low.
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RM-88 System Module Nokia Customer Care Parameter Description Value VCOFF- Hardware cutoff (falling) 2.6V (typ.) SWCOFF SW cutoff limit ~3.2V The master reset threshold controls the internal reset of N2200 / (N2300). If battery voltage is above VMSTR, N2300’s charging control logic is alive. Also, RTC is active and supplied from the main battery. Above VMSTR, N2300 allows the system to be powered on although this may not succeed due to voltage drops during start up.
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RM-88 System Module Nokia Customer Care Power distribution Figure 53 Power distribution diagram System power-up Power up procedure starts when the user presses power key (option 1) or when (not empty) battery is attached (option 2). In addition, some other triggers may start the system. Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 System Module Nokia Customer Care Power down procedure Controlled powering off is done with the aid of SW when the user requests it or when the battery voltage is falling too low. Uncontrolled powering off happens for example when battery is suddenly removed. Clocking scheme The main system clock is a small signal sine wave created in the RF-section of the engine with Voltage Controlled, Temperature Compensated, crystal oscillator (VCTCXO). The delivered frequency is 38.4MHz .
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RM-88 System Module Nokia Customer Care Figure 54 BT-RAP connection IrDA IrDA specifies a reliable, fully digital peer-to-peer data link between IrDA units at data rates from 9600 bits/ s to 115 kbit/s. The link is based on the serial transmission of data as pulses of infra red light at the wave length of 870nm and angles of +-15degrees at the range 0 - 50 to 100 cm.
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RM-88 System Module Nokia Customer Care Between EM (N2200) and cellular RF there are 8 pins + VBAT. RF is controlled directly by RAP and N2200. Digital control signals, such as RFBus and reset signals, are taken from RAP and analog control signals, such as AFC and TxC, are taken from EM ASIC (N2200). RFBUS is similar control bus than CBUS and DBUS, but it is only used as controlling interface between RF and BaseBand (RAP).
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RM-88 System Module Nokia Customer Care SIM interface The device has one SIM (Subscriber Identification Module) interface. It is only accessible if battery is removed. The SIM interface consists of an internal interface between RAP and EM ASIC (N2200), and of an external interface between N2200 and SIM contacts. The EM ASIC SIM1 interface supports both 1.8 V and 3.0 V SIM cards. The SIM interface voltage is first 1.
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RM-88 System Module Nokia Customer Care Figure 55 MiniSD contact area & pin order Battery interface The battery interface supports a 3-pole battery interface. The interface consists of three connectors: VBAT, BSI and GND. The BSI line is used to recognize the battery capacity by a battery internal pull down resistor. Page 8 –14 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 System Module Nokia Customer Care Figure 56 Battery pin order Table 14 Battery interface connections Pin Signal I/O Engine connection Notes 1 VBAT -> EM ASIC N2200 VBAT Battery voltage 2 BSI -> EM ASIC N2200 BSI Battery size indication (fixed resistor inside the battery pack) 3 GND GND Ground Battery temperature is estimated by measuring separate battery temperature NTC via the BTEMP line, which is located on the transceiver PWB.
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RM-88 System Module Nokia Customer Care • EM ASIC (N2200) Information on ambient lighting is used to control the backlights of the phone: • Keypad lighting is switched on only when the environment is dark / dim • Display backlights are dimmed, when the environment is dark / dim The ambient light sensor itself is a photo transistor, which is temperature-compensated by an external NTC resistor. N2200 reads the light sensor (LS) and temperature (LST) results.
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RM-88 System Module Nokia Customer Care Figure 58 E-mail LED implementation Audio concept Audio HW architecture In BB5.0, the digital functions of audio are integrated into RAP and analogue functions into EM ASIC N2200. Audio codec supports 48 kHz and 44.1 kHz sampling rates in addition to 40 kHz, which provides full 20 kHz audio bandwidth (near CD quality) in Rx path. Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 System Module Nokia Customer Care Figure 59 Audio block diagram Internal microphone Internal microphone is used for HandPortable (HP) and Internal HandsFree (IHF) call modes. An analogue electret microphone is connected to Retu ASIC’s Mic1P and Mic1N is connected ground near Retu. Figure 60 Internal microphone passive circuitry Page 8 –18 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 System Module Nokia Customer Care Internal earpiece The internal earpiece is used in the HandPortable (HP) call mode. A dynamic 7x11 mm earpiece capsule is connected to N2200 ASIC’s differential outputs EarP and EarN. Figure 61 Internal earpiece circuitry Internal speaker The internal speaker is used in Internal HandsFree (IHF) call mode. A dynamic 20 mm speaker is connected to N2200 ASIC’s outputs HFSpP and HFSpN.
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RM-88 System Module Nokia Customer Care Figure 63 Vibra circuitry Baseband technical specifications External interfaces Name of Connection Connector reference USB X2001 Charger X2000 Headset X2002 SIM X2700 MiniSD X5200 Battery connector X2070 USB IF electrical characteristics Description Parameter Min Max Unit Absolute maximum voltage on D+ and D- VD+/D- -1 4.6 V Supply voltage VBUS 4.4 5.25 V Notes USB specification revision 2.
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RM-88 System Module Description Nokia Customer Care Parameter Min Differential input sensitivity VDI 0.2 Differential input voltage range VCM 0.8 Low-level output voltage VOL High-level output voltage (driven) Output signal crossover voltage Max Unit Notes V |(D+) - (D-)| 2.5 V Included VDI range 0 0.3 V VOH 2.8 3.6 V VCRS 1.3 2 V FBUS interface electrical characteristics (between RAP and N2300) Description Parameter Min Max Unit High-level input voltage VIH 0.
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RM-88 System Module Nokia Customer Care MiniSD interface connections Signal name/ RAP3G Signal name/ SD Card Signal Properties Descriptio Direction -- Levels -- Freq./Timing n / Notes Resolution GenIO 09 or MMCCmd <> 0-1.8 V / 0-3.6V GenIO 13 or GenIO 53 MMCClk > 0-1.8 V / 0-3.6V GenIO 08 or MMCDa <> 0-1.8 V / 0-3.6V SD Data bit 0 GenIO 07 MMCLSSh utDn > 0-1.8 V / 0-3.6V Level shifter shutdow n GenIO 10 SDDa2 < 0-1.8 V / 0-3.6V Data bit 1 0-1.8 V / 0-3.6V Data bit 2 0-1.
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RM-88 System Module Signal name/ RAP3G Nokia Customer Care Signal name/ SD Card Signal Properties Descriptio Direction -- Levels -- Freq./Timing n / Notes Resolution GenIO 06 SD Write Protect < 0-1.8 V / 0-3.6V Write protect detection , used only with normal size SD Card GenIO 02 MMCFBClk < 0-1.8 V / 0-3.
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RM-88 System Module Nokia Customer Care Description Parameter Min Max Unit Notes Threshold for charging, rising (N2300) VMSTR+ 2.1 V Typical value Threshold for charging, falling (N2300) VMSTR- 1.9 V Typical value Battery interface electrical characteristics Table 18 Battery IF electrical characteristics Description Parameter Max Unit Operation voltage VIN 4.23 VDC Current rating IIN 0.
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RM-88 System Module Description Nokia Customer Care Parameter Min Typ Max Unit Notes (VDDS = 1.
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RM-88 System Module Nokia Customer Care Pin Signal I/O Engine connection Notes 10 D5 <-> RAP Lcdda5 Data 11 D7 <-> RAP Lcdda7 Data 12 TE -> RAP Te Tearing Effect 13 RESX <- RAP Gpio60 Reset (active low) 14 CSX <- RAP Lcdsx Chip Select (active low) 15 D6 <-> RAP Lcdda6 Data 16 D4 <-> RAP Lcdda4 Data 17 D2 <-> RAP Lcdda2 Data 18 GND 19 D0 <-> RAP Lcdda0 Data 20 WRX -> RAP Lcdwrx Write Enable (active low) 21 GND 22 VDDI <- EM ASIC (N2200)