CCS Technical Documentation RH-25 Series Transceivers System Module Issue 1 10/2003 Confidential ©Nokia Corporation
RH-25 System Module CCS Technical Documentation Contents Page No Introduction.................................................................................................................... 4 BB Hardware Characteristics ......................................................................................4 Technical Summary .....................................................................................................4 Functional Description ......................................................
RH-25 System Module CCS Technical Documentation RF Functional Description .........................................................................................29 Block diagram ......................................................................................................... 29 Circuit Diagrams and PWB Layout ........................................................................ 30 Receiver.........................................................................................................
RH-25 System Module CCS Technical Documentation Introduction This document describes the system module for the RH-25 transceiver. The baseband module includes the baseband engine chipset, the UI components, and the acoustic components. RH-25 is a hand-portable dual band TDMA 850/1900 with AMPS. It has been designed using DCT4 generation baseband (UEM/UPP) and RF (TACO) module. The baseband module has been developed as part of the DCT4 common Baseband.
RH-25 System Module CCS Technical Documentation TACO RF Module LCD Passive color STN color display Combo Memory 64Mbit Flash/4Mbit SRAM Led Driver Keyboard & display illumination UEM IHF Ext Audio Connector UPP Keyboard (UI Module) IrDa 1.8V Battery Vibra Audio Amp IHF Accessory Regulator 2.
RH-25 System Module CCS Technical Documentation can rise either by connecting a new battery with VBAT > VMSTR+, or by connecting charger and charging the battery voltage to above VMSTR+. Acting DEAD Mode If the phone powered off when the charger is connected, the phone is powered on and enters a state called Acting Dead. In this mode, no RF circuitry is powered up. To the user, the phone acts as if it is switched off.
RH-25 System Module CCS Technical Documentation • Battery • LED Driver • LCD Display • RF (TACO) IF Block • Memory Module • Keyboard (UI module) • External Audio Connector • IrDa Interface • Vibra • FM Radio • System Connector (Tomahawk) • PWB Strategy • EMC Strategy • Test Interface UEM and UPP The UEM contains a series of voltage regulators to supply both the baseband module and the RF module. Both the RF and Baseband modules are supplied with regulated voltages of 2.78 V and 1.8 V.
RH-25 System Module CCS Technical Documentation processors are located in the UPP. The interface between baseband and RF is implemented in the UEM and UPP ASIC. The UEM provides A/D and D/A conversion of the in-phase and quadrature receive and transmit signal paths. It also provides A/D and D/A conversions of received and transmitted audio signals to and from the user interface. The UEM supplies the analog signals to RF section according to the UPP DSP digital control.
RH-25 System Module CCS Technical Documentation Table 2: 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 4(GND) 3(BTEMP) 2(BSI) Charge GND Figure 2: Battery pack contacts The BSI fixed resistor value indicates type and default capacity of a battery.
RH-25 System Module CCS Technical Documentation Li-Ion VBATT Overcharge / Overdischarge protection BSI BTEMP EMC Figure 3: Interconnection diagram Supply Voltage Regulation The UEM ASIC controls supply voltage regulation. There are six separate regulators used by baseband block. For more detailed description about the regulator parameters see the document UEM ASIC Specification.
RH-25 System Module CCS Technical Documentation UEM VCHAR VCHARin VCHARout Over Temp. Detection VBATT Vmstr Switch Driver Ctrl Logic Current Sensing/ Limit VBATT WatchDog + Comp - VBATTlim Figure 4: UEM charging circuitry Charger Detection Connecting a charger creates voltage on the VCHAR input to the UEM. When the VCHAR input voltage level rises above the VCHDET+ threshold, the UEM starts the charging process. VCHARDET signal is generated to indicate the presence of the charger for the SW.
RH-25 System Module CCS Technical Documentation interface is protected using transient voltage suppressor (TVS) and 1.5A fuse. The TVS device used in RH-25 is rated for 16V@175W. Figure 5: Charger interface TVS characteristics Breakdown voltage (VBR) 17.8Vmin (at IT 1.
RH-25 System Module CCS Technical Documentation Coil Schottky VBAT Cin Cout V in DLIGHT En Is Ext Vovp LED Driver FB Rlcd Cx R Gnd Cosc LCD Illumination Keyboard Illumination Figure 6: Shared LED driver circuit for LCD and keyboard backlight LCD Backlight LCD Backlight consists of two white LEDs, which are integrated with the LCD module. Keyboard Illumination The keyboard light consists of six white LEDs on the UI board.
RH-25 System Module CCS Technical Documentation C C Driver C R 0C 0 C 128 Top View Active area 128x128 R 128 Figure 7: Color LCD module RF Interface Block The interface between the baseband and the TACO RF module can be divided into two categories. The first is the digital interface. It interfaces between the UPP and the RF chip. The serial digital interface is used to control the operation of the different blocks in the RF chip. The second is the analog interface.
RH-25 System Module CCS Technical Documentation access and synchronous burst access (with crossing partition boundaries) and has various data protection features. Upon power up or reset, the device defaults to asynchronous read configuration. Synchronous burst read is indicated to the device by writing to the flash configuration register and can be terminated by deactivating the device. The device supports reads and in-system erase and program operations at Vcc=1.8 V (Voltage range 1.7-1.9 V).
RH-25 System Module CCS Technical Documentation Charge UEM MIC1N EMC Microphone MIC1P Figure 8: Internal microphone connection Internal Speaker The internal earpiece is a dynamic earpiece with 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.
RH-25 System Module CCS Technical Documentation UPP8M LM4855 GenIO(14) GenIO(15) GenIO(16) Enable EN Clock CLK Data DATA Figure 10: Digital interface of audio amplifer VB AT Cs = 1 uF By pass LM4855 Bias IH F Speaker out + Amplifier Phone audio Radio audio Ri n Amplifier Output Mode Select Amplifier out Rout + Amplifier Rout Lout + Radio audio Li n Amplifier Amplifier Lout Stereo Headset Di gital Volu me Control SPI GN D EN CL K DAT A Figure 11: Block diagram of audio amplifer
RH-25 System Module CCS Technical Documentation External Microphone Connection The external microphone input is fully differential and lines are connected to the UEM microphone input MIC2P/N. The UEM (MICB2) provides bias voltage. Microphone input lines are ESD protected. Creating a short circuit between the headset microphone signals generates the hook signal. When the accessory is not connected, the UEM resistor pulls up the HookInt signal.
RH-25 System Module CCS Technical Documentation IrDa Interface The IrDa interface when using transceiver with 1.8V I/O is designed into the UPP. The IR link supports speeds from 9600 bit/s to 1.152 MBit/s up to distance of 80 cm. Transmission over the IR if half-duplex. The length of the transmitted IR pulse depends on the speed of the transmission. When 230.4 kbit/s or less is used as a transmission speed, pulse length is maximum 1.63ms. If transmission speed is set to 1.
RH-25 System Module CCS Technical Documentation System Connector (Tomahawk) The 14-pin Tomahawk bottom connector consists of charging plug socket and Tomahawk System Connector. Tomahawk system connector includes signals for the following: Shielding GND HSEAR_R_P Power in 5V in from DKU-5 cable HSEAR_R_N DKU-5 (similar to USB) (optional) N Standard FBUS HSEAR_L_P FBUS XMIC P Accessory detection/removal and controlling XMIC N ACI (Accessory Control Interface) DATA GND 2.
RH-25 System Module CCS Technical Documentation voltage level is higher than the threshold of the comparator and thereby its output will be changed to low. This changes is leading to an interrupt. These HeadInt interrupts are initiated the accessory detection or removal sequence. External Accessory Regulator An external LDO Regulator is needed for accessory power supply purposes. All ACI-accessories will require this power supply.
CCS Technical Documentation Electromechanical Thickness with surface finish 1100um ± 110 Maximum thickness with solder resist 1270um RH-25 System Module Solder resist Finished copper 20 µm ± 10 µm 30 µm ± 10 µm Dielectric Aramid 100 µm ± 20 µm Finished copper 17 µm +2/-5 µm Dielectric 150 µm ± 25 µm Finished copper 17 µm +2/-5 µm Dielectric 150 µm ± 25 µm Finished copper 17 µm +2/-5 µm Dielectric 150 µm ± 25 µm Finished copper 17 µm +2/-5 µm Dielectric Aramid 100 µm ± 20 µm Finished
RH-25 System Module CCS Technical Documentation EAR Lines EAR lines are output signals, also routed on layer 2 and 7, to obtain immunity for conducted emission from UEM. Internal EAR lines are EMC/ESD protected by radiated fields from the earpiece by the low-impedance signal path in the PWB. The same PWB outline has been implemented for the SALT speaker. Low ohm coils inductors are used in series with the speaker for immunity against incoming fields from the speaker.
RH-25 System Module CCS Technical Documentation tors incorporated to reduce rise times and reflections. Slew rate controlled buffers should be used on custom components wherever possible to reduce the EMC produced by the circuit. Separate power supplies for digital, analog, and RF-blocks should be used as much as possible.
RH-25 System Module CCS Technical Documentation FBUS_TX FBUS_RX VPP GND M B U S /C L K Figure 18: Production/test/after market interface Flash Interface Flash programming in production is done through the test pads in the above figure on the PWB. FBUS Interface FBUS is an asynchronous data bus having separate TX and RX signals. Default bit rate of the bus is 115.2 kbit/s. FBUS is mainly used for controlling and programming phone in the production. This is the primary interface used in RH-25.
RH-25 System Module CCS Technical Documentation BB_RF Interface Connections The BB and RF parts are connected together without a physical connector. Rip # Signal Name DAMPS, GSM1900 Connected from--- to RFICCNTRL(2:0) BB I/O Signal Properties A/D--Levels---Freq./ Timing resolution RF IC Control Bus from UPP to RF IC (TACO) 0 RFBUSCLK UPP RFIC In Dig 0/1.8V 1 RFBUSDA UPP/RFIC RFIC I/O Dig (0: <0.4V 1: >1.
RH-25 System Module CCS Technical Documentation Rip Signal Name DAMPS, GSM1900 # Connected from--- to RFCLK (not BUS -> no rip #) RFCLK VCTCXO > BB I/O Signal Properties A/D--Levels---Freq./ Timing resolution Description / Notes System Clock From RF To BB, original source VCTCXO, buffered (and frequency shifted, WAM only) in RF IC (TACO) UPP In RFIC Ana 800mVpp typ (FET probed) 19.
RH-25 System Module CCS Technical Documentation VRF Globals instead of Bus Regulated RF Supply Voltages from UEM to RF. Current values are of the regulator specifications, not the measured values of RF VR1 A UEM RFIC Out Vreg 4.75 V +- 3 % 10 mA max. UEM, charge pump + linear regulator output. Supply for UHF synth phase det …. VR1 B UEM RFIC Out Vreg 4.75 V +- 3 % 10 mA max. UEM, charge pump + linear regulator output. VR2 UEM RFDiscr./ RFIC Out Vreg 2.78 V +- 3 % 100 mA max.
RH-25 System Module CCS Technical Documentation RF Functional Description Block diagram VBatt RFConv RFAuxConv V R 1 B 4.7V V Flash 1 2.78V 2.78V V R 2 2.78V V R 1 A 4.7V 2.78V 2.78V 2.78V 2.78V VR 6 VR 5 VR 4 VR 3 VR 7 IP A1& 2 0...5m A RFRegs RH-25 RF -20 dB @ f O+-60 kHz 1 35 .5 4 MHz IF Fi lter s T DMA L o w: 8 69 .0 1 .. . 8 93 .9 7 TDMA 2 2 I & Q fi xe d Ga in +24 dB 2 I & Q va ri abl e G ai n -6 ...
RH-25 System Module CCS Technical Documentation As the previous figure clearly shows, most of the RF functions are centered around Taco RF ASIC. Receiver IF stages, low-band LNA, PLLs, RXVHF oscillator, TX VHF VCO active part and loop filter, high-band and low-band TX up-converters, TX IF stages, IQ modulator and demodulator and reference oscillator buffering are all integrated on single chip. Taco design and sample testing are carried out by ASIC team.
RH-25 System Module CCS Technical Documentation mixer design. The 2nd order distortion requirements of the mixer are set by the 'half IF' suppression. A fully balanced mixer topology is required. Additionally, the receiver 3rd order IIP tends to depend on active mixer IIP3 linearity due to pretty high LNA gain. IF stages include a narrowband SAW filter on the 1st IF and an integrated lowpass filtering is on zero IF.
RH-25 System Module CCS Technical Documentation Note, that in this point, term linear means -33dB ACP. The required LO power is about -6dBm. The LO signal is fed from Taco. Before power amplifier RF signal is filter in band filter. The typical insertion loss is about -2.7dB, and maximum less than -3.0dB. The input and output return losses are about -10dB. Power amplifier is 50W/50W module.
RH-25 System Module CCS Technical Documentation Antenna Circuit The antenna circuit stands for duplex filters and diplexer. The cellular band duplex filter is band pass type SAW filter with typical insertion loss about -2.0dB. The PCS band duplex filter is band stop (for receiver band) type ceramic filter and it's typical insertion loss is about -1.7dB. Insertion losses of diplexer are -0.45dB and -0.55dB (at maximum) for cellular and PCS band, typical values being about -0.30dB and -0.35dB.
RH-25 System Module CCS Technical Documentation Table 8: TDMA 1900 TX Power level RF power at external Antenna Pad (dBm) Tuning target tolerant (dB) Testing limits (dB) 2 26.3*** +/- 0.25 0.5/-0.5 3 23.3 +/-0.5 +/-2.0 4 19.3 +/-0.5 +/-2.0 5 15.3 +/-0.5 +/-2.0 6 11.3 +/-0.5 +/-2.0 7 7.3 +/-0.5 +/-2.0 8 3.3 +/-0.5 +/-2.0 9 -0.7 +/-0.5 +/-2.0 10 -4.7 +/-0.5 +/-2.0 *** 26.3 dBm for channel 1000 and 1998; 27.0 dBm for channel 2.
RH-25 System Module CCS Technical Documentation Rx IF 0 MHz Rx IF 135.54 MHz Rx Channel Centre Frequencies TDMA1900 1930.05...1989 .99 MHz RX IQ Rx Channel Centre Frequencies TDMA800 869.04...893 .97 MHz F Rx VHF 271.08 MHz 2 PLL UHF TDMA800 2009.16 MHz 2059.02 MHz TDMA1900 RX: 2065.59 MHz 2125.53 MHz TDMA1900 TX: 2031.81 MHz 2091.75 MHz VCTCXO 19.44 MHz F PLL 2 BaseBand PLL Tx channel centre frequencies TDMA800 824.01...848 .97 MHz F 2 Tx VHF TDMA800 and1900: 361.
RH-25 System Module CCS Technical Documentation DC Characteristics Power Distribution Diagram UEM TACO 2 mA VR1a VCC_CP UHF phasedet. TX VHF VCO 40 mA VR2 38/36 mA 1 mA Pwr Det 45 mA 2G TX mixer VCC_TXMIX TX-IF VCC_TX 1G TX mixer VCC_TXMIX REF_in / REF_out VCC_REF biasing VCC_RX RX 1st mixer VCC_RX RX-IF VCC_RX LNA / LNA_bias VCC_LNA TXVHF PLL VCC_TX2 RXVHF PLL VCC_RX2 RX 1st mixer VCC_PLL UHF PLL VCC_PLL 0.9 mA VR3 1 mA VCTCXO 0.5 mA VR4 6.
RH-25 System Module CCS Technical Documentation Table 9: Regulator circuit information Regulator name Output voltage (V) Regulator Max current (mA) RF total 1GHz RF total 2GHz VR1 a/b 4.75 +/- 3% 10 4 4 VR2 2.78 +/-3% 100 100 76 VR3 2.78 +/-3% 20 2 2 VR4 2.78 +/-3% 50 23 24 VR5 2.78 +/-3% 50 5 0 VR6 2.78 +/-3% 50 tbd tbd VR7 2.78 +/-3% 45 40 45 IPA1, IPA2 2.7 max 1 +/- 10% 3 +/- 4% 3.5 +/- 4% 5 +/- 3% 1.3 - 5.0 1.3 - 3.7 VREFRF01 1.35 +/- 0.5% 0.12 0.05 0.
RH-25 System Module Page 38 CCS Technical Documentation ©Nokia Corporation Confidential Issue 1 10/2003
