Nokia Customer Care 7 - System Module Issue 1 04/2005 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 Nokia Customer Care 7 - System Module This page has been intentionally left blank 2 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 7 - System Module Nokia Customer Care Table of Contents Page No Glossary of Terms............................................................................................... 5 Baseband ............................................................................................................. 8 Block diagram .................................................................................................... 9 Frequencies in baseband................................................................
RM-94 Nokia Customer Care 7 - System Module Illumination....................................................................................................... 24 Test possibility ............................................................................................... 25 SIM................................................................................................................... 25 Test possibility ............................................................................................
RM-94 7 - System Module Nokia Customer Care Glossary of Terms ACI Accessory Control Interface ADC Analogue to Digital Converter AFC Automatic Frequency Control ASIC Application Specific Integrated Circuit ASM Antenna switch module BB Baseband BSI Battery Size Indicator DCT4 Digital Core Technology, generation 4 DSP Digital Signal Processor DUT Device under test EDGE Enhanced Data Rates for Global Evolution EGPRS Enhanced General Packed Radio Service EMC Electro Magnetic Compatibil
RM-94 Nokia Customer Care 6 7 - System Module IMEI International Mobile Equipment Identity I/O Input/Output IR Infrared IrDA Infrared Data Association LCD Liquid Crystal Display LED Light Emitting Diode LDO Low Drop Out LNA Low Noise Amplifier LO Local Oscillator MCU Micro Controller Unit PA Power Amplifier Phoenix SW tool of DCT4 PLL Phase Locked Loop PWB Printed Wired Board RF Radio Frequency RTC Real Time Clock RX Receiver SA Spectrum analyzer SIM Subscriber Identi
RM-94 7 - System Module Nokia Customer Care VBU Back-up Battery Cut Off voltage (typical: 2.0 V) VCO Voltage controlled oscillator VCTCXO Voltage controlled temperature compensated oscillator V Master Reset Threshold (typical: 2.1 V) 8-PSK Issue 1 04/2005 Phase Shift Keying with 8 states (Modulation scheme for EDGE/ GPRS) COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 Nokia Customer Care 7 - System Module Baseband The RM-94 product is a DCT4.5 expression segment phone designed for the EGSM900, GSM1800 and GSM1900 networks.
RM-94 7 - System Module Nokia Customer Care ■ Block diagram Figure 1:Baseband block diagram UEMEK supplies both baseband and RF with power via built in voltage regulators, which are connected to the battery. The RF parts use mainly 2.78 V and the baseband parts 1.8V I/O voltage. The UPP core is supplied with programmable core voltage of 1.0V, 1.3V or 1.5V. UEMEK includes 7 linear LDO (Low Drop-Out) regulators for baseband and 7 regulators for RF.
RM-94 Nokia Customer Care 7 - System Module The UEMEK ASIC handles the analog interface between the Baseband and the RF section. UEMEK 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 UEMEK supplies the analog TXC and AFC signals to the RF section according to UPP signal control. There are also separate signals for PDM coded audio.
RM-94 7 - System Module Nokia Customer Care ■ Frequencies in baseband Table 1: Frequencies in baseband Frequency Context UPP UEMEK 32 kHz SleepClk 1 MHz CBUS X X Up to 1 MHz RFConvClk X X 6,5 MHz Display IF X 3,25 MHz SIMIF 13 MHz DBUS, RFBUClik X 26 MHz RF Clk X 52 MHz Memory Clock X Flash SIM Comment X Estimation X X Min X X ■ PWB Characteristics of the PWB • Single PWB • 8 layer board • Double side assembled Key components Figure 2:Key components Issue 1 04/2005
RM-94 Nokia Customer Care 7 - System Module Table 2: Key components Position 12 Component Name D1470 HW Accelerator D2800 UPP8M V4.2E D2200 UEMEKv2.0 D3000 Combo Memory (128M NOR + 16M UTRAM) COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 7 - System Module Nokia Customer Care Technical Specifications ■ Baseband core UPP Main characteristics of the used UPP are: • DSP, LEAD3 16 bit DSP core 32 bit IF max.
RM-94 Nokia Customer Care 7 - System Module External SRAM and Flash The Combo-Memory is a multi chip package memory which combines 128 Mbit (8Mx16) muxed burst multibank flash and 16 Mbit muxed CMOS PSRAM (Pseudo SRAM: DRAM with SRAM interface). The combo is supplied by single 1,8 V for read, write and erase operations. For accelerated flash programming, Vpp = 9.0 V has to be applied to VPP input of the combo device. The combo memory is housed in a 44-ball FBGA.
RM-94 7 - System Module Nokia Customer Care Active In Active mode, the phone is in normal operation, scanning for channels, listing to a base station, transmitting and processing information. Sleep Mode Sleep mode is entered when both MCU and DSP are in stand–by mode. Both processors control the sleep mode. The sleep mode is exited either by the expiration of a sleep clock counter in the UEMEK or by some external interrupt, generated by a charger connection, key press, headset connection etc.
RM-94 Nokia Customer Care 7 - System Module Figure 3:Power Distribution Diagram ■ DC characteristics Supply voltage ranges Table 3: Battery voltage ranges Signal VBAT 16 Min 3.1V Nom 3.7V Max 4.2V Note 3.2V SW cut off 2.95V HW power off COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 7 - System Module Nokia Customer Care Baseband regulators Table 4: Regulator specification Regulator Load current (mA) Limit (V) Min/Max (Typ) VCORE 200 1.476 / 1.65 (1.57) VIO 150 1.72 / 1.88 (1.8) VSIM1 25 1.745 / 1.855 (1.8) VANA 80 2.70 / 2.86 (2.78) VFLASH1 70 2.70 / 2.86 (2.78) VAUX2 70 2.70 / 2.86 (2.78) VAUX3 10 2.70 / 2.86 (2.78) VR2 100 2.70 / 2.86 (2.78) VR3 20 2.70 / 2.86 (2.78) VR4 50 2.70 / 2.86 (2.78) VR5 50 2.70 / 2.86 (2.78) VR6 50 2.70 / 2.
RM-94 Nokia Customer Care 7 - System Module Function Groups ■ Battery A battery of the type BL-5B is used. It is a Li Ion based standard cell. The battery capacity is 760mAh. The battery has a three-pin connector. In order to get temperature information of the battery, the NTC mounted on the PWB within the BB area is used. Ni based batteries are not supported. The BSI resistor has a nominal value of 75 kOhm.
RM-94 7 - System Module Nokia Customer Care Figure 5:Internal microphone connection Internal speaker The internal earpiece is a dynamic earpiece with an impedance of 32 ohms. The earpiece is low impedance one since the sound pressure is to be generated using current and not voltage as the supply voltage is restricted to 2.7V. The earpiece is driven directly by the UEMEK and the earpiece driver (EARP & EARN outputs) is a fully differential bridge amplifier with 6 dB gain.
RM-94 Nokia Customer Care 7 - System Module IHF speaker UEMEK has an integrated Audio power amplifier to generate output for the IHF speaker. Block diagram of IHF. For RM-94, the Integrated Hands Free Speaker is used to generate hands free speech, and also polyphonic ringing tones. The speaker capsule is mounted into the A Cover, and spring contacts are used to connect the IHF Speaker contacts to the PWB. The IHF is furthermore used to generate alerting and warning tones.
RM-94 7 - System Module Nokia Customer Care led by a PWM signal from the UEMEK. The Frequency can be set to 64, 129, 258 or 520 Hz and duty cycle can vary between 3% and 97%. Test possibility Phoenix Vibra Test ■ LCD module RM-94 has a 130 x 130 16 bpp (bits per pixel) active matrix color display. The number of colours is 64k, i.e. 16 bits. The LCD Interface is using serial 9-bit data transfer. The LCD display is connected to transceiver PWB by board-to-board connector.
RM-94 Nokia Customer Care 7 - System Module LCD connector The TE signal is not used. Table 6: LCD connector Pin No: Description Type Symbol Parameter Min 1 Power supply OUT VLED- LED power supply current 2 Power supply voltage IN VDDI Operating voltage 1.
RM-94 7 - System Module Nokia Customer Care Figure 7:LCD display Connector type (Plug) Hirose DF23C-12DP-0.5V 6 1 1 6 7 12 12 7 Top view Back view Test possibility Phoenix Display Test For troubleshooting see Display faults in Baseband Troubleshooting Instructions. Issue 1 04/2005 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 Nokia Customer Care 7 - System Module ■ Keypad The RM-94 keys are connected to the UPP via the KEYB(10:0) bus. The keypad consists of a 5x4 matrix of 5 rows, ROW0 – ROW4, and 4 columns, COL1 – COL4. Additionally, there are 3 lines that are directly connected to the UPP IO and can be detected independently. COL5 is connected to GENIO0. Test possibility Phoenix Keyboard Test For troubleshooting, see Keypad faults in Baseband Troubleshooting Instructions.
RM-94 7 - System Module Nokia Customer Care Figure 9:Illumination VBAT UEME DLIGHT Keybord light DC/DC-Converter Vin VLED+ EN VLED- LCD Backlight GEN I/O 19 Test possibility Phoenix LED test For troubleshooting see Display faults in Baseband Troubleshooting Instructions. ■ SIM The whole SIM interface locates in UPP and UEMEK. The interface part in the UEMEK contains power up/down, port gating, card detect, data receiving, ATR-counter, registers and level shifting buffers logic.
RM-94 Nokia Customer Care 7 - System Module Figure 10:UPP/UEMEK )SIM Interface Connections SIM SIMIO SIMIO SIM ASIP SIMClk SIMRst VSIM UPP UEME SIMIO SIMClk SIMClk SIMRst SIMRst SIMIF register UIF Block From battery type contact BSI UEME digital logic UEMEInt CBusDa CBusEnX CBusClk Test possibility Phoenix SIM Test For troubleshooting, see SIM Card faults in Baseband Troubleshooting Instructions. ■ IR module RM-94 has an IR module. The IR link supports speeds from 9600 bit/s to 1.
RM-94 7 - System Module Nokia Customer Care Interfaces ■ BB-RF interface The interface between the Baseband and RF can be divided into three categories: • The digital interface from UPP to the RF ASIC (Helgo). The serial digital interface is used to control the operation of different blocks in the RF ASICs • The analogue interface between Baseband and RF. The analogue interface consists of Tx and Rx converter signals. The power amplifier control signals TXC and AFC also come from the UEMEK.
RM-94 Nokia Customer Care 7 - System Module Table 7: System connector interface description Pin # Signal Notes 1 VCHAR 2 GND Charge ground 3 ACI Insertion & removal detection / Serial data bi-directional 1 kbit/s 4 Vout Power supply for external accessories 5 Not used in RM-94 6 FBUS_RX Serial data from accessory to phone / 115 kbit/s 7 FBUS_TX Serial data from phone to accessory / 115 kbit/s 8 GND Data ground 9 XMIC N Negative audio in signal 10 XMIC P Positive audio in sign
RM-94 7 - System Module Nokia Customer Care DC plug NMP standard 2- or 3-wire chargers are compatible with the charger IF. The IF does not support 3-wire charging control. Nevertheless, it is potential possible to use a 3-wire charger without PWM charging support. RM-94 uses a 3mm DC plug besides the PopPortTM IF. Issue 1 04/2005 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 Nokia Customer Care 7 - System Module RF Module Description The RF module performs the necessary high frequency operations of the triple-band engine. Both the transmitter and receiver have been implemented by using a direct conversion architecture, which means that the modulator and demodulator operate on the channel frequency. No intermediate frequencies are used for up- or down-conversion. The core of the RF is an application-specific integrated circuit (RF ASIC), Helgo85.
RM-94 7 - System Module Nokia Customer Care ■ General specifications of the transceiver Parameter Unit Cellular System GSM900, GSM1800, GSM1900 Modulation schemes GMSK, 8-PSK RX Frequency Band GSM900: 925 … 960 MHz GSM1800: 1805 ... 1880 MHz GSM1900: 1930 … 1990 MHz TX Frequency Band GSM900: 880 … 915 MHz GSM1800: 1710 ... 1785 MHz GSM1900: 1850 … 1910 MHz Output Power GMSK GSM900: +5 … +33 dBm (3.2 mW … 2 W) GSM1800: +0 … +30 dBm (1.0 mW … 1 W) GSM1900: +0 … +30 dBm (1.
RM-94 Nokia Customer Care 7 - System Module ■ Frequency concept The 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 modulated signals from baseband are directly converted up to the transmission frequency and the received RF signals directly down to the baseband frequency.
RM-94 7 - System Module Nokia Customer Care Figure 14:RF power distribution diagram UEM 4.75 V [ 4.6V ... 4.9V ] charge pump (VCP) VR1 2.78 V [ 2.70V ... 2.86V ] Tx modulator (Vcc_ModOut) VR2 TX buffer & EDGE ALCs (VRF_TX) 2.78 V [ 2.70V ... 2.86V ] VCTCXO (+VCC) VR3 digital interface (VDIG) 2.78 V [ 2.70V ... 2.86V ] Rx Front End (VRF_RX) VR4 Bias & Rx CH filters (VF_RX) RF controls (VPAB_VLNA) 2.78 V [ 2.70V ... 2.86V ] VR5 PLL prescaler (VPRE) phasing dividers of Rx (VLO) VR6 2.
RM-94 Nokia Customer Care 7 - System Module Figure 15: RF block diagram VLNA 1900 Rx VRF_RX RXIP Balun SAW RF Front-end Module LNAB_P LNA_P HB BP 1800 Rx LC LB LP SAW RXQP VBB VF_RX INTEGRATED LC LOW-PASS FILTERS ESD 900 Rx FILTER SAW AND AGC FUNCTION VDIG BUILT-IN DC COMP. 1900 Tx VBB VR5 VLO 900 Tx VPRE,VDIG,VCP VPRE PLL VRF_RX VR4 LC RFTEMP temp sensor EGSM VR6 LC VF_RX VPAB_VLNA CTRL inputs VR3 VDIG VR2 VRF_TX VR1 VCP VLO VR7 VBB Divide Balun by 2/4 2.
RM-94 7 - System Module Nokia Customer Care VANT_2 VANT_3 VANT_1 Rx1 Rx2 Rx3 Tx1 VC1 VC2 VC3 GSM GSM GSM GSM GSM 900 1800 1900 900 1800/1900 Rx Rx Rx Tx Tx [Volt] [Volt] [Volt] 0 0 0 0 0 0 0 2.6 2.6 0 2.6 0 2.6 2.6 0 Tx2 X X X X X To switch the TX-GSM 1800/1900 path both signals VANT2 and VANT3 have to be activated. Receiver Each receiver path is a direct conversion linear receiver.
RM-94 Nokia Customer Care 7 - System Module The VCTCXO (Voltage Controlled Temperature Compensated Crystal Oscillator) generates the clock frequency of 26 MHz. This frequency is buffered in the RF ASIC and fed to the UPP. Additionally, it is used as the reference frequency for the RF PLL. The frequency of the VCTCXO is locked into the frequency of the base station with the help of an AFC voltage which is generated in the UEM by an 11 bit D/A converter.
RM-94 7 - System Module Nokia Customer Care The GSM 900 and the GSM 1800 filters are matched to the corresponding LNA inputs of the RF ASIC with a differential matching network (LC-type). For GSM 1900, an external LNA provides a gain of approximately 17 dB. For conversion of the unbalanced output port to the balances input port of the RF ASIC a balun is applied, followed by a differential matching network (LC-type).
RM-94 Nokia Customer Care 7 - System Module Transmitter signal paths VLNA 1900 Rx VRF_RX RXIP Balun SAW RF Front-end Module LNAB_P LNA_P HB BP 1800 Rx LC LB LP SAW RXQP VF_RX VBB INTEGRATED LOW-PASS FILTERS LC ESD 900 Rx FILTER SAW AND AGC FUNCTION VDIG BUILT-IN DC COMP. 1900 Tx VBB VR5 VLO 900 Tx VPRE,VDIG,VCP VPRE PLL VRF_RX VR4 LC RFTEMP temp sensor EGSM VR6 LC VF_RX VPAB_VLNA CTRL inputs VR3 VDIG VR2 VRF_TX VR1 VCP VLO VR7 VBB Divide Balun by 2/4 2.
RM-94 7 - System Module Nokia Customer Care In GMSK mode, the output signal of the RF ASIC has constant level as the ALC amplifiers are set to constant gain. The different power levels are generated by the gain variation of the power amplifier. In EDGE mode, the ALC amplifiers generate the different power levels and the PA is set to constant gain. Frequency synthesizer signals The reference oscillator is implemented as Voltage Controlled Temperature Compensated Crystal Oscillator (VCTCXO) module.
RM-94 Nokia Customer Care 7 - System Module Printed Wiring Board Figure 16:Assembled PWB with shielding chambers 40 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 7 - System Module Nokia Customer Care ■ RF key component placement Figure 17:Placement of RF key components Issue 1 04/2005 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
RM-94 Nokia Customer Care 7 - System Module List of RF key components: Position 42 Component Name Z7800 Antenna Switch Module ASM Z7802 SAW1800 RX Z7801 SAW1900 RX N7500 RF ASIC (Helgo 8.5) V7800 LNA 1900 RX G7501 VCTCXO G7500 VCO N7700 TX-PA Z7803 SAW900 RX Z7700 SAW900 TX COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
