CCS Technical Documentation RH-27 Series Transceivers System Module Issue 1 11/2003 Confidential © 2003 Nokia Corporation
RH-27 System Module CCS Technical Documentation Contents Page No Introduction.................................................................................................................... 4 BB Hardware Characteristics ......................................................................................4 Technical Summary .....................................................................................................4 Functional Description ......................................................
RH-27 System Module CCS Technical Documentation RF Functional Description .........................................................................................27 Circuit Diagrams and PWB Layout ........................................................................ 28 Receiver................................................................................................................... 28 Frequency Synthesizers.......................................................................................
RH-27 System Module CCS Technical Documentation Introduction This document describes the system module for the RH-27 transceiver. The baseband module includes the baseband engine chipset, the UI components, and the acoustic components. RH-27 is a hand-portable dual band CDMA 850/1900 with AMPS. It has been designed using DCT4 generation baseband (UEM/UPP) and RF module. The baseband module has been developed as part of the DCT4 common Baseband.
RH-27 System Module CCS Technical Documentation Functional Description Modes of Operation The RH-27 baseband engine has five different operating modes: 1 No supply 2 Acting Dead 3 Active 4 Sleep 5 Charging No Supply Mode In NO_SUPPLY mode, the phone has no supply voltage. This mode is due to the disconnection of the main battery or a low battery voltage level. The phone exits from NO_SUPPLY mode when a sufficient battery voltage level is detected.
RH-27 System Module CCS Technical Documentation sleep mode, the main oscillator is shut down and the baseband section uses the 32 kHz sleep clock oscillator as its reference. Charging Mode Charging can be performed in parallel with any other operating mode. The Battery Size Indicator (BSI) resistor inside the battery pack indicates the battery type/size. The resistor value corresponds to a specific battery capacity and technology.
RH-27 System Module CCS Technical Documentation 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. The UEM contains six linear LDO (low drop-out) regulators for Baseband and seven regulators for RF circuitry. RF regulator VR1 uses two LDOs and a charge pump. VR1 regulator is used by RF module.
RH-27 System Module CCS Technical Documentation Table 1: BLD-3 characteristics Description Value Nominal discharge cut-off voltage 3.1V Nominal battery voltage 3.7V Nominal charging voltage 4.2V Maximum charger output current 850mA Minimum charger output current 200mA Cell pack impedance -20 ... 0 oC 180mΩ max Cell pack impedance 0 ... +20 oC 150mΩ max Cell pack impedance +20 ...+60 oC 130mΩ max Cell pack impedance +60 ...
RH-27 System Module CCS Technical Documentation reasons, the phone software will shut the phone off if it senses a temperature of 38oC or higher on BTEMP line. Table 3: BSI resistor values Parameter Min Typ Max Unit Notes Battery size indicator resistor BSI 75 kΩ Battery size indicator (BLD-3) Tolerance “1% NTC thermistor BTEMP 47 kΩ 4000 K Battery temperature indicator (NTC pulldown) 47kΩ“5% @ 25 oC Beta value (B).
RH-27 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 3: 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-27 System Module CCS Technical Documentation interface is protected using a transient voltage suppressor (TVS) and a 1.5A fuse. The TVS device used in RH-27 is rated for 16V@175W. Figure 4: Charger interface TVS characteristics Breakdown voltage (VBR) 17.8Vmin (at IT 1.
RH-27 System Module CCS Technical Documentation Coil Schottky VBAT Cin Cout V in DLIGHT Is Ext Vovp LED Driver En FB Rlcd Cx R Gnd Cosc LCD Illumination Keyboard Illumination Figure 5: 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-27 System Module CCS Technical Documentation C C C Driver R 0C 0 C 128 Top View Active area 128x128 R 128 Figure 6: Color LCD module RF Interface Block The interface between the baseband and the RF module can be divided into two categories, the digital interface and the analog interface. The digital interface is 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.
RH-27 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-27 System Module CCS Technical Documentation Charge UEM MIC1N EMC Microphone MIC1P Figure 7: 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-27 System Module CCS Technical Documentation UPP8M LM4855 GenIO(14) GenIO(15) GenIO(16) Enable EN Clock CLK Data DATA Figure 9: 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 10: Block diagram of audio amplifer
RH-27 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-27 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-27 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-27 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.
RH-27 System Module Electromechanical Thickness with surface finish 1100um ± 110 Maximum thickness with solder resist 1270um CCS Technical Documentation 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-27 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-27 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-27 System Module CCS Technical Documentation FBUS_TX FBUS_RX VPP GND M B U S /C L K Figure 17: 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-27.
RH-27 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-27 System Module Rip CCS Technical Documentation 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-27 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-27 System Module CCS Technical Documentation • Duplexer high band • RX800, RX1900, TX800, and TX1900 SAWs • RX IF and TX IF Filters The specifications for all key components are maintained by RF team and are available in network. Circuit Diagrams and PWB Layout Receiver Receiver design and system partition come from Snoopy AD project. The receiver shows a superheterodyne structure with zero 2nd IF. Low-band and high- band receivers have separate front ends from diplexer to the 1st IF.
RH-27 System Module CCS Technical Documentation Two VHF synthesizers consist of: RX VHF Synthesizer includes integrated PLL and VCO and loop filter and resonator. The output of RX-VHF PLL is used as LO signal for the second mixer in receiver. TX VHF Synthesizer and Loop filter is integrated into the RF ASIC. See depicted block diagrams and synthesizer characteristics from Synthesizer specification document.
RH-27 System Module CCS Technical Documentation Power amplifier is 50W/50W module. It does not have own enable/disable control signal, but it can be enabled by bias voltage and reference bias current signals. The gain window is +31 to +36dB and linear output power is +30dBm (typical condition) with -28dB ACP. The nominal efficiency is 40%. Power Control For power monitoring, there is a power detector module (PDM) build up from a (dual) coupler, a biased diode detector and an NTC resistor.
RH-27 System Module CCS Technical Documentation Table 6: 800 MHz analog TX Power level RF power at external Antenna Pad (dBm) Tuning target tolerant (dB) Testing limits (dB) 5 14.5 +/-0.5 +/-2.0 6 10.5 +/-0.5 +/-2.0 7 6.5 +/-0.5 +/-2.0 Table 7: 800 MHz digital TX Power level RF power at external Antenna Pad (dBm) Tuning target tolerant (dB) Testing limits (dB) 2 27.3 +/- 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.
RH-27 System Module CCS Technical Documentation has a common feeding point for both antenna radiators, which results in the need for diplexer. In a singleband transciever, a SMD-compatible through chip can be used.. Software Compensations The following software compensations are required: • Power levels temperature compensation • Power levels channel compensation • Power level reduction due to low battery voltage • TX Power Up/Down ramps • PA's bias reference currents vs.
RH-27 System Module CCS Technical Documentation DC Characteristics Regulators The regulator circuit is UEM and the specifications can be found from: 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.
RH-27 System Module Page 34 CCS Technical Documentation © 2003 Nokia Corporation Confidential Issue 1 11/2003
