Nokia Customer Care RH-30/RH-31 Series Cellular Phones System Module and User Interface Issue 2 11/2004 © 2004 Nokia Corporation.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Table of Contents Page No Glossary of Terms .................................................................................................................................... 4 Introduction .............................................................................................................................................. 7 Electrical Modules ......................................................................................
Company Confidential Nokia Customer Care RH-30/RH-31 System Module IHF Speaker & Stereo Audio Amplifier ......................................................................................34 Internal Microphone .......................................................................................................................34 Internal Speaker ...............................................................................................................................
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Glossary of Terms Page 4 ACI Accessory Control Interface ADC Analog-Digital Converter AFC Automatic Frequency Control AGC Automatic Gain Contro API Application Programming Interface ARM Processor architecture ASIC Application Specific Integrated Circuit BB Baseband CBus Control Bus connecting UPP_WD2 with AEM and UEM CCS Customer Care Solutions CMT Cellular Mobile Telephone (MCU and DSP) COG Chip On Glass CPU Cen
Company Confidential Nokia Customer Care EFR Enhanced Full Rate EGPRS Enhanced General Packet Radio Service EMC Electromagnetic compatibility EMI Electromagnetic Interference ESD Electro Static Discharge EXT RF External RF FBUS Asynchronous Full Duplex Serial Bus GPRS General Packet Radio Service GSM Global System for Mobile communications HS Half Rate Speech HSCSD High Speed Circuit Switched Data IC Integrated Circuit IHF Integrated Hands Free IMEI International Mobile Equipment
RH-30/RH-31 System Module Page 6 Company Confidential Nokia Customer Care PA Transmit Power Amplifier PC Personal Computer PCM Pulse Code Modulation PCM SIO Synchronous serial bus for PCM audio transferring PIFA Planar Inverted F-antenna PWB Printed Wiring Board PWM Pulse Width Modulation RF Radio Frequency RTC Real Time Clock SIM Subscriber Identity Module SW Software UEM Universal Energy Management UI User Interface UPP Universal Phone Processor VCXO Voltage Controlled Crys
Company Confidential Nokia Customer Care RH-30/RH-31 System Module Introduction Electrical modules The system module1bj consists of Radio Frequency (RF) and baseband (BB). User Interface (UI) contains display, keyboard, IR link, vibra, system connector and audio parts. FM radio and camera module are located on the main PWB 1bj. The electrical part of the keyboard is located in separate UI PWB named 1bk. 1bk is connected to radio module PWB through a spring connector.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care System Module: Baseband The system module (or Engine) consists of baseband and RF sub-modules, each described below. Baseband module, technical summary Main functionality of the baseband is implemented into two ASICs: UPP (Universal Phone Processor) and UEM (Universal Energy Management). Figure 2: Baseband block diagram Baseband is running from power rails 2.8V analog voltage and 1.8V I/O voltage.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module tery is 30 minutes minimum. The UEM ASIC handles the analog interface between the baseband and the RF section. UEM provides A/D and D/A conversion of the in-phase and quadrature receive and transmit signal paths and also A/D and D/A conversions of received and transmitted audio signals to and from the user interface. The UEM supplies the analog TXC and AFC signals to RF section according to the UPP DSP digital control.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Baseband technical specifications Absolute maximum ratings Signal Note Battery Voltage (Idle) -0.3V - 5.5V Battery Voltage (Call) Max 4.7V Charger Input Voltage -0.3V - 16V DC characteristics Regulators and supply voltage ranges Battery voltage range Signal Min. Nom Max Note VBAT 3.1V 3.6V 4.2V (charging high limit voltage) 3.1V SW cut off BB regulators Signal Min. Nom Max Note VANA 2.70V 2.78V 2.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care RF regulators Signal Min Nom Max Note VR1A 4.6V 4.75V 4.9V Imax = 10mA VR2 2.70V 3.20V 2.78V 3.3V 2.86V 3.40V Imax = 100mA VR3 2.70V 2.78V 2.86V Imax = 20mA VR4 2.70V 2.78V 2.86V Imax = 50mA Isleep = 0.1mA VR5 2.70V 2.78V 2.86V Imax = 50mA Isleep = 0.1mA VR6 2.70V 2.78V 2.86V Imax = 50mA Isleep = 0.1mA VR7 2.70V 2.78V 2.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Power distribution diagram Page 12 © 2004 Nokia Corporation.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care Baseband external and internal signals and connections This section describes the external and internal electrical connection and interface levels on the baseband. The electrical interface specifications are collected into tables that covers a connector or a defined interface.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care FM radio interface BB Signal FM Radio Signal Min Nom Max VFLASH2 Vcca 2.7V 2.78V 2.86V Imax =10.5 mA Vcc(vco) 2.7V 2.78V 2.86V Imax =940 µA Vccd 2.7V 2.78V 2.86V Imax = 3.9 mA FMClk 1.4V 0 1.8V 1.88V 0.4V GenIO(3) 32kHz 30ppm Condition Note High Low Reference clock for FM radio module Frequency Also 6.5 MHz can be used Stability GenIO(8) FMWrEn 1.4V 0V 1.8V 1.88V 0.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care AC and DC characteristics of RF-baseband voltage supplies Signal name From To Parameter Min Typ Max Unit Function VBAT Battery PA, UEM Voltage 2.95 3.6 4.2 V 2000 mA 0.8 2 µA Battery supply. Cut-off level of DCT4 regulators is 3.04V. Losses in PWB tracks and ferrites are taken account to minimum battery voltage level. 4.75 4.9 V 2 10 mA 2.78 2.86 V 65 100 mA 2.78 2.86 V 1 20 mA 2.78 2.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care AC and DC characteristics of RF-baseband digital signals Signal name From To Parameter Input Characteristics Min TXP (RFGenOut3) TXA RFBusEna1X UPP UPP UPP Helgo Helgo Helgo 1.88 V ”0” 0 0.4 V Load Resistance 10 220 kΩ Load Capacitance 20 pF Timing Accuracy 1/4 symbol ”1” 1.38 1.88 V ”0” 0 0.4 V Load Resistance 10 220 kΩ Load Capacitance 20 pF Timing Accuracy 1/4 symbol ”1” 1.38 1.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care RESET (GENIO6) UPP Helgo ”1” 1.38 1.85 V ”0” 0 0.4 V 20 pF 220 kΩ 1/4 symbol Load capacitance Load resistance 10 Timing accuracy Reset to Helgo AC and DC characteristics of RF-baseband analogue signals Signal name VCTCXO From VCTCXO To UPP Parameter Min Frequency 13 Signal amplitude 0.2 Input Impedance 10 Typ 0.8 40 VCTCXOGnd VCTCXO UPP DC Level RXI/RXQ Helgo UEM Voltage swing (static) 1.35 1.
RH-30/RH-31 System Module RFTemp IPA1 / IPA2 Page 18 Helgo UEM Company Confidential Nokia Customer Care UEM PA Voltage at -20oC 1,57 Voltage at +25oC 1,7 Voltage at +60oC 1,79 V Temperature sensor of RF. PA final stage quiescent current adjustment Output Voltage 0 2.7 V Current range 0 5 mA © 2004 Nokia Corporation.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care External signals and connections Keyboard (board-to-board) connector Pin Signal Condition Note 1 GND 0V 2 VLED+ VBAT 7.5V LED off LED on Supply Voltage for Keyboard LEDs 3 ROW(4) 0.7xVIO 0 1.8V 0.3xVIO High Low Keyboard matrix row 4 4 ROW(3) 0.7xVIO 0 VIO 0.3xVIO High Low Keyboard matrix row 3 5 COL(2) 0.7xVIO 0 VIO 0.3xVIO High Low Keyboard matrix column 2 6 ROW(2) 0.7xVIO 0 VIO 0.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care LCD connector (board to board) Table 1: LCD connector (board to board) Pin Signal Min Nom Max 1 VDDI 1.72V 1.8V 1.88V 2 XRES 0.7*VDDI 0 VDDI 0.3*VDDI 4 5 SDA SCLK CXS Note Logic voltage supply Connected to VIO Logic ’1’ Logic ’0’ Reset Active low trw Reset active Logic ’1’ Logic ’0’ Serial data 100ns tsds Data setup time 100ns tsdh Data hold time VDDI 0.3*VDDI Logic ’1’ Logic ’0’ Serial clock input 6.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care DC connector Pin Signal 1 VCHAR Min. 7.0 VRMS Nom Max Condition Note 11.1Vpeak 16.9 Vpeak 7.9 VRMS 1.0 Apeak Standard charger Charger positive input 8.4 VRMS 9.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Bottom connector pins and signals: Spectral range Voltage / Current levels Max or nominal serial impedance CHARGE V Charge DC 0-9 V / 0.85 A 2 GND Charge GND 3 ACI ACI 4 VOUT DC out 5 NC 6 FBUS RX FBUS 115kbit 0 / 2.78V 7 FBUS TX FBUS 115kbit 0 / 2.78V 8 GND Data GND 9 XMIC N Audio in 300 - 8k 1Vpp & 2.78V Ext. Mic Input 10 XMIC P Audio in 300 - 8k 1Vpp & 2.78V Ext.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care SIM connector Pin Name Parameter Min. Typ Max Unit Notes 1 VSIM 1.8V SIM Card 1.6 1.8 1.9 V Supply voltage 3V SIM Card 2.8 3.0 3.2 V 1.8V SIM Card 0.9xVSIM 0 VSIM 0.15xVSIM V 3V SIM Card 0.9xVSIM 0 VSIM 0.15xVSIM V 2 3 SIMRST SIMCLK Frequency 3.25 Trise/Tfall 4 DATA 5 NC 6 GND Issue 2 11/2004 MHz 50 ns SIM reset (output) SIM clock 1.8V Voh 1.8V Vol 0.9xVSIM 0 VSIM V 3V Voh 3V Vol 0.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Internal signals and connections Internal microphone Signal Min. MICP MICN Nom Max Condition Note 200mVpp AC 2.2kΩ to MIC1B MICP 2.0 V 2.1 V 2.25 V DC 2.0V 2.1V 2.25V DC Min. Nom Max Condition Note 0.8V 2.0 Vpp 0.85V AC DC Differential output (Vdiff = 4.0 Vpp) EARP 0.75V 0.75V 0.8V 2.0 Vpp 0.85V AC DC Min. Nom Max Condition Note 0.8V 2.0 Vpp 0.85V AC DC Differential output (Vdiff = 4.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module Baseband Functional Description Modes of operation RH-30/RH-31 baseband has six different functional modes: • No supply • Back-up • Acting Dead • Active • Sleep • Charging No Supply In NO_SUPPLY mode, the phone has no supply voltage. This mode is due to disconnection of main battery and backup battery or low battery voltage level in both of the batteries.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care voltage can be programmed to be 2.78V or 3.3V. VR4 -VR7 can be enabled, disabled, or forced into low quiescent current mode. VR3 is always enabled in Active mode. Sleep Mode Sleep mode is entered when both MCU and DSP are in stand–by mode. Sleep is controlled by both processors. When SLEEPX low signal is detected UEM enters SLEEP mode. VCORE, VIO and VFLASH1 regulators are put into low quiescent current mode.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module Pin numbering of battery pack Signal name Pin number Function VBAT 1 Positive battery terminal BSI 2 Battery capacity measurement (fixed resistor inside the battery pack) BTEMP 3 Battery temperature measurement (measured by ntc resistor inside pack) GND 4 Negative/common battery terminal Figure 5: BLD-3 battery pack pin order 4(GND) 3(BTEMP) 2(BSI) 1 (+) Power up and reset Power up and reset is controlled by the UEM ASIC.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Power up with PWR key When the Power on key is pressed the UEM enters the power up sequence as described in the previous paragraph. Pressing the power key causes the PWRONX pin on the UEM to be grounded. The UEM PWRONX signal is not part of the keypad matrix. The power key is only connected to the UEM. This means that when pressing the power key an interrupt is generated to the UPP that starts the MCU.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module RTC alarm power up If phone is in power off mode when RTC alarm occurs the wake up procedure is as described in section Power Up and Reset. After baseband is powered on, an interrupt is given to MCU. When RTC alarm occurs during power on state the interrupt for MCU is generated. A/D channels The UEM contains the following A/D converter channels that are used for several measurement purpose.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care FM radio The FM radio in the transceiver RH-30/RH-31 is a single chip electronically tuned FM stereo radio with fully integrated IF selectivity and demodulation. The FM radio is completely adjustment free. It can be tuned the European, US and Japanese FM bands. The channel tuning and bus data are controlled by UPP. A variable capacitance diode, two coils and some resistors and capacitors are the external components for the FM radio.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care Camera CIF camera module will be used in RH-30/RH-31. Camera is connected to baseband (UPP) through HW accelerator IC. External 1.8V regulator is used as a power supply (VDIG) for camera module and HW accelerator together with VFLASH2.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care The SIM interface is powered up when the SIMCardDet signal indicates "card in". This signal is derived from the BSI signal. Parameter Variable Min. Typ Max Unit SIMCARDet, BSI comparator Threshold Vkey 1.94 2.1 2.26 V SIMCARDet, BSI comparator Hysteresis (1) Vsimhyst 50 75 100 mV The entire SIM interface locates in two chips: UPP and UEM.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care External accessory regulator An external LDO Regulator exists for accessory power supply purposes. All ACI-accessories require this power supply. Regulator input is connected to battery voltage VBAT and output is connected to Vout pin in the system connector. Regulator is controlled via UPP (On/Off-function). Accessory regulator signals Signal Min. Nom Max Note Vout 2.70V 2.78 2.86V Imax = 150mA GenIO(0) 1.4 1.8 1.88 0.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Int comparator output to change state, in this case from 0 to 1. The button can be used for answering incoming calls but not to initiate outgoing calls. Figure 10: External microphone connection HookInt MICB2 UEM MIC2P EMC/ESD Components MIC2N XMICP XMICN External earphone connections Headset implementation uses separate microphone and earpiece signals.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module Internal audio IHF speaker & stereo audio amplifier Integrated Hands Free Speaker, 16mm MALT, is used to generate speech audio, alerting and warning tones in RH-30/RH-31. Audio amplifier is controlled by the UPP. Speaker capsule is mounted in the C-cover. Spring contacts are used to connect the IHF Speaker contacts to the main PWB.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care by the UEM and the earpiece driver in UEM is a bridge amplifier. In RH-30/RH-31 8mm PICO type earpiece is used. Figure 14: Internal speaker Common mode choke EARP UEM EARN IHF speaker & stereo audio amplifier Integrated Hands Free Speaker, 16mm MALT, is used to generate speech audio, alerting and warning tones in RH-30/RH-31. Audio amplifier is controlled by the UPP. Speaker capsule is mounted in the C-cover.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care Memory block For the MCU UPP includes ROM, 8 kbytes, that is used mainly for boot code of MCU. To speed up the MCU operation small 4 kbyte cache is also integrated as a part of the MCU memory interface. For program memory 8Mbit (512k x 16bit) PDRAM is integrated. RAM block can also be used as data memory and it is byte addressable. RAM is mainly for MCU purposes but also DSP has also access to it if needed.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Audio control Figure 17: Audio block diagram RH-30/RH-31 earp iece UPP T om ahaw k bottom connector UEM earp m ic1 m ic2 headint xear m ic3 m icrofo ne M ic ACI SP K R L out R out Lo ut R out ear d ata m ic d ata Ph s Pihf Lin R in PA R adio L R anten na Control Bus IH FSp eak er Accessory identification and power supply Figure 18: Accessory identification and power supply Tomahawk UEM Vflash1 Vflash1 Vhead 100k HEADIN
Company Confidential RH-30/RH-31 System Module Nokia Customer Care Backup battery Backup battery is used in case when main battery is either removed or discharged. Backup battery is used for keeping real-time clock running for minimum of 30 minutes. Rechargeable backup battery is connected between UEM VBACK and GND. In UEM backup battery charging high limit is set to 3.2V. The cut–off limit voltage (V BUCoff–) for backup battery is 2.0V.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care RF Module Introduction The RF module performs the necessary high frequency operations of the GSM850/ EGSM900/1800/1900 tripleband (EDGE) engine. Both the transmitter and receiver have been implemented by using direct conversion architecture which means that the modulator and demodulator operate at the channel frequency. The core of the RF is an application-specific integrated circuit, Helgo.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module RF frequency plan RF frequency plan is shown below. The VCO operates at the channel frequency multiplied by two or four depending on the frequency band of operation. This means that the baseband modulated signals are directly converted up to the transmission frequency and the received RF signals directly down to the baseband frequency.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care DC characteristics Regulators The transceiver baseband section has a multi function analog ASIC, UEM, which contains among other functions six pieces of 2.78 V linear regulators and a 4.8 V switching regulator. All the regulators can be controlled individually by the 2.78 V logic directly or through a control register.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care Typical current consumption The table shows the typical current consumption in different operation modes. Operation mode Current consumption Notes Power OFF < 10 uA Leakage current (triple band PA) RX, EGSM900/GSM850 75 mA, peak RX, GSM1800/GSM1900 70 mA, peak TX, power level 5, EGSM900/GSM850 1700 mA, peak TX, power level 0, GSM1800/ GSM1900 1000 mA, peak Issue 2 11/2004 © 2004 Nokia Corporation.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Power distribution Figure 20: Power distribution diagram HELGO LNA GSM1800/ 1900 Page 44 © 2004 Nokia Corporation.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care RF Characteristics Channel numbers and frequencies System Channel number TX frequency RX frequency Unit GSM850 128< =n <=251 F= 824.2+0.2* (n -128) F= 869,2+0.2* (n -128) MHz GSM900 0 < =n <=124 F = 890 + 0.2 * n F = 935 + 0.2 * n MHz 975<= n <= 1023 F= 890+0.2* (n -1024) F= 935+0.2* (n -1024) MHz GSM1800 512 <= n <= 885 F=1710.2+0.2*(n-512) F=1805.2+0.2*(n-512) MHz GSM1900 512 <= n <=810 F=1850.2+0.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Parameter Unit and value Number of power levels 8-PSK GSM850: 12 EGSM900: 12 GSM1800: 14 GSM1900: 14 Transmitter characteristics Item Values (GSM850/EGSM900/1800/1900) Type Direct conversion, nonlinear, FDMA/TDMA LO frequency range 3296...3396/3520...3660 MHz/3420...3570 MHz/ 3700...3820 MHz Output power GMSK 33/33/30/30 dBm 8-PSK 27/27/26/26 dBm Gain control range min.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module RF block diagram The block diagram of the RF module can be seen below. The detailed functional description is given in the following sections E Issue 2 11/2004 © 2004 Nokia Corporation.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Frequency synthesizers The VCO frequency is locked by a PLL (phase locked loop) into a stable frequency source given by a VCTCXO which is running at 26 MHz. The frequency of the VCTCXO is in turn locked into the frequency of the base station with the help of an AFC voltage which is generated in UEM by an 11 bit D/A converter. The PLL is located in Helgo and it is controlled through the RFBus.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care Figure 21: Front End RX RX GSM1900 PCS RX RX DCS GSM1800 Ant RX RX TX TX EGSM TX TX EGSM900 EGSM900 GSM1800/ EGSM DCS/PCS GSM850 GSM850 1900 Power amplifier The power amplifier features include: • 50 ohm input and output, GSM850/EGSM900/GSM1800/GSM1900 • internal power detector • EDGE mode Figure 22: Power amplifier EGSM900/GSM850 EGSM out out EGSM900 GSM850 EGSM in in DCS/ GSM1800/1900 PCS outout GSM1800/ DCS/ 1900 PCS in in
RH-30/RH-31 System Module Company Confidential Nokia Customer Care RF ASIC Helgo The RF ASIC features include • Package uBGA108 • Balanced I/Q demodulator and balanced I/Q modulator • Power control operational amplifier, acts as an error amplifier • The signal from VCO is balanced, frequencies 3296 to 3980 MHz • GSM850/EGSM900 and GSM1800 low noise amplifier (LNA) are integrated. The Helgo can be tested by test points only.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module User interface modules The RH-30/RH-31 UI module has a separate 4-layer UI PWB 1bk. The user interface features a 130 x130 pixel passive matrix color STN display, 4096 colours. The LCD display is connected to transceiver PWB by 10-pin board-to-board connector. Earpiece, microphone, IHF speaker and Vibra are connected using spring type connections. IR module and system connector are SMD devices.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Rows are read while columns one at the time are written low. If some row is down it indicates that the key which is at the cross point of selected column and row was pressed. After key press detection registers in UPP are reset and columns are written back to low state. Figure 24: Keyboard matrix connections.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module LCD RH-30/RH-31 has 130 x130 pixel 12bpp (bits per pixel) passive matrix color STN display. LCD is connected to transceiver PWB by 10-pin board to board connector. Interface is using 9-bit data transfer. Partial display function is implemented in the module. Table 1 shows main characteristics of RH-30/RH-31 LCD. Figure 3 shows LCD interface connections.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Figure 25: LCD connections. Clk, Sda, Csx Board to Board connector LED LE UPP GenIo (Rst) LED LE VLE VLEDD- VFlash1, Vio VLED VLED+ + UEM White LED Driver Page 54 © 2004 Nokia Corporation.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module LCD & keypad illumination In RH-30/RH-31, white LEDs are used for LCD and keypad lighting. Two LEDs are used for LCD lighting and six LEDs for keyboard. LCD and keypad LEDs can be controlled separately. A step up DC-DC converter is used as a LED driver. LCD LEDs are driven in serial mode to achieve stable backlight quality. This means that a constant current flow is lead through LCD LEDs.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care Figure 27: White LED driver Driver is controlled by UEM via CallLED1 output. This signal is connected to driver EN-pin (on/off). PWM control for LEDs facilitates the ‘fading’ effect when LEDs are turned on/ off. PWM control can also be used to limit the average current through LEDs for example in high temperature. Flashlight Flashlight is controlled via CallLED2 output to external BJTswitch/driver.
Company Confidential Nokia Customer Care RH-30/RH-31 System Module Figure 28: Flashlight. Internal earpiece Internal earpiece is a dynamic leak tolerant type earpiece with an impedance of 32Ohms. The earpiece is a low impedance one since the sound pressure is to be generated using current and not voltage as supply voltage is restricted to 2.7V. The earpiece is driven differentially directly by UEM. Earpiece capsule is mounted in LCD frame assembly.
RH-30/RH-31 System Module Company Confidential Nokia Customer Care 230.4 kbit/s or less is used as a transmission speed, pulse length is maximum 1.63µs. If transmission speed is set to 1.152Mbit/s, the pulse length is 154ns. Figure 29: IR module connections. VBAT UPP IR_TX VFLASH1 IR_RX VIO SD UEM IRVibra A vibra alerting device is used to generate a vibration signal for an incoming call. Vibra is located in the bottom end of the phone and it is connected to main PWB with spring contacts.
Company Confidential RH-30/RH-31 System Module Nokia Customer Care Pop-Port system connector Pop-Port system connector consists of a charging plug socket and a Pop-Port System Connector. The Pop-Port is a feature based interface. The accessory contains information about its features (ACI ASIC) and it is detected with a fully digital detection procedure. Table 4: Pop-Port functions.
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