NHL-2NA Series Transceivers System Module LG4 and Grip Module LS4 Issue 2 11/02 ¤Nokia Corporation
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CCS Technical Documentation System Module LG4 and Grip Module LS4 Table of Contents Page No Abbreviations ................................................................................................................. 6 LG4 System Module ...................................................................................................... 8 IIntroduction ................................................................................................................8 Technical overview .................
System Module LG4 and Grip Module LS4 CCS Technical Documentation HW Implementation................................................................................................ 28 Ambient Light Sensor ................................................................................................30 Flashing ......................................................................................................................31 Connections to Baseband .....................................................
CCS Technical Documentation System Module LG4 and Grip Module LS4 SIM card interface diagram CPU Diagram IR module diagram LPRF diagram Memories diagram Power Diagram RF Diagram Test Interface UEM Diagram User Interface Diagram Parts Placement Diagram LG4_07 6 7 8 9 10 11 12 13 14 15 16 Issue 2 11/02 ¤Nokia Corporation Page 5
System Module LG4 and Grip Module LS4 CCS Technical Documentation Abbreviations ADC AEM AFC ALG ALS ARM ASIC BB BLUETOOTH, BT BSI CBus CCI CCP CMT CPU CSP CTSI DAC DAI DBUS DCN DIF DLL DRC DSP EFR EGSM EQ EXT RF GPRS GSM HF HFCM HS HSCSD I/O IHF IC IR IRED IrDA LCD LG4 LNA MCU MIC, mic PA Page 6 Analog-Digital Converter Auxiliary Energy Management ASIC Automatic Frequency Control Ambient Light Guide Ambient Light Sensor Processor architecture Application Specific Integrated Circuit Baseband Bluetooth Ba
CCS Technical Documentation PC PDA PWB RF RFBUS SDRAM SIM UI UEM VGA VCXO VCTCXO VCM VGA Issue 2 11/02 System Module LG4 and Grip Module LS4 Personal Computer Pocket Data Application Printed Wiring Board Radio Frequency Control Bus For RF Synchronous Dynamic Random Access Memory Subscriber Identity Module User Interface Universal Enefry Management Video Graphic Array Voltage Controlled Crystal Oscillator Voltage Controlled Temperature Compensated Crystal Oscillator.
System Module LG4 and Grip Module LS4 CCS Technical Documentation LG4 System Module IIntroduction This is the module specification of LG4 which is the main electronics module in NHL-2NA GSM dual band phone. NHL-2NA phone is also nick named as Nokia 7650. The sales name is Nokia 7650. Technical overview LG4 features • • • • • • • • • • • Dual band GSM tranceiver.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Figure 1: Main components on LG4 Antenna PA switch Ambient light sensor IR Module Earpiece connector Proximity sensor Issue 2 11/02 Hagar VCO UI module backlight DC/DC converter VCTCXO 64Mbit SDRA UI module connector UEM UPP_WD2 AEM 32 + 128 Mbit flashes Bluetooth module, BT102 ¤Nokia Corporation Page 9
System Module LG4 and Grip Module LS4 CCS Technical Documentation Figure 2: Spring connection pads on top side of LG4 Power switch pads Integrated handsfree speaker pads Headset connector pads Microphone pads BT antenna pads Figure 3: Spring connection pads on back side of LG4 and flex cable solder pads Flex solder pads, Grip IF Prod testing: Powering Camera pads SIM GSM antenna pads Production testing Page 10 ¤Nokia Corporation Issue 2 11/02
CCS Technical Documentation System Module LG4 and Grip Module LS4 Figure 4: Test points in LG4 baseband Test points of BB J104 (UEMInt) J116 (TxID) J270 (GenVbattIO) J140 (VBAtt) J262 (UEMRst) J120 (RxQD) J117 (TxQD) J114 (FLDEX) (mem cntr) RF: J118 (AuXDA) J113 (FLCS0X) J119 (RxID) J109 (FLADa0) J110 (VcoreA) J105 (AEMSleepX J102 (SleepX) J111 (FLCS1x) J103 (PURX) J138 (Vctrl (camera) J115 (FlClk) J100 (RFClk) J07 (SDRAd0) J101 (Sleepclk) Issue 2 11/02 J106 (SDRDa0) J108 (SDRAMClk) ¤Nok
System Module LG4 and Grip Module LS4 CCS Technical Documentation Block diagram Below is the block diagram of LG4 module. External interfaces are drawn as arrows crossing LG4 border. Figure 5: Block diagram of LG4 BT antenna Flashing & Testing Interface Flex to LS4 (Grip) LG4 module BB Bluetooth Sensors RF VGA camera UImodule Audio SIM card GSM antenna UI Interface UI module interface pin numbering is presented in figure below. UI interface details are in UI-module specification.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Baseband Technical Summary The heart of the BB is UPP_WD2, which includes MCU, DSP and Digital Control Logic. Powering handled by Using AEM ASIC and UEM ASIC. There is Flash Memory 128Mbit + 32Mbit Flashes (20 Mbytes) and 64 Mbit (8 Mbytes) SDRAM. So there is a total of 28 Mbytes of Memory Capacity. In BB there is an integrated Handsfree Audio Amplifier In AEM.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Functional Description BB Description Core is based on UPP_WD2 CPU, which is a special version of the DCT4 UPP ASIC. UPP_WD2 takes care of all the signal processing and operation controlling tasks of the phone as well as all PDA tasks. For Power management there are two Asics for controlling energy management and supplying current and different voltages; UEM and AEM.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Modes of Operation NHL-2NA employs several hardware & SW controlled operation modes. Main Modes are described below. • NO_SUPPLY mode means that the main battery is not present or its voltage is too low (below UEM master reset threshold) and back-up battery voltage is too low. • In BACK_UP mode the main battery is not present or its voltage is too low but back-up battery has sufficient charge in it.
System Module LG4 and Grip Module LS4 CCS Technical Documentation too low for operation and power down the system. Clocking Scheme A 26 MHz VCTCXO is used as system clock generator in GSM. During the system start-up, UEM and AEM use their own RC-oscillators to generate timing for state machines. All clock signals of the engine are illustrated in following figure. In PWR_ON mode, SW must configure CBUS clock (1MHz) to be active all the time, as this clock is used in AEM as digital clock and for the SMPS.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Power Distribution, Control and Reset All power (except backup battery power) is drawn from BLB-2 Li-Ion battery located in the Grip part of the phone. Power goes through LM3822 current gauge which is used for current measurement and thus for remaining operating time estimation. LG4 board contains two power ASIC’s UEM and AEM which contain the regulators needed for generating the different operating voltages.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Power-up sequence (Reset mode) RESET mode can be entered in four ways: by inserting the battery or charger, by RTC alarm or by pressing the power key. After voltage appearing at UEM’s pin UEMRSTX (connected to AEM’s pin REFENA) is used as indication for AEM to start up HW regulators. Also VCTXO is Powered up by using VR3 (UEM). After the 220 ms delays regulator are configured and UEM enters PWR_ON mode and system reset PURX is released.
CCS Technical Documentation System Module LG4 and Grip Module LS4 watchdog can not be disabled. The time can be set using a register. This watchdog is used for powering the system off in a controlled manner. The other one is for security block and is used during IMEI code setting. The third one is a power key watchdog. It is used to power off the system in case SW is stuck and the user presses the power key. This WD is SW configurable. There is also a ”soft watchdog” in UPP_WD2.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Back-up battery and real time clock Real time clock (RTC), crystal oscillator and back-up battery circuitry reside in UEM. A register in UEM controls back-up battery charging and charging is possible only in POWER_ON State. Baseband Measurement A/D Converter The UEM contains 11 channels A/D converter, which is used for different Baseband measurement purposes. The resolution of A/D converter is 10 bits.
CCS Technical Documentation System Module LG4 and Grip Module LS4 NHL-2NA BB Features & HW interfaces NHL-2NA BB User interface UI-Module Interface Interface is for Color Display 176 x 208 (X3) resolution and backlight is white LED with lightguide. Also Part of Keyboard is locating in module with Navigation Key. Display is connected to LG4 by 30-pin Board-to-Board connector. Interface includes also power rails for UI and Backlight. Interface uses GPIO pins of UPP_WD2.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Figure 10: Principle of the connection of the hall sensor PRG GND GND UPP_WD2 Vflash1 Vs GND Q GenIO25 100nF Pins list of Hall sensors: 10pF Fi 5 Pi i l f th ti f th h ll Pin Min Nom Max Pin number Vs 2.4 V 2.7 V 3.5 V 1 GND 0V Q 0V PRG 0V Page 22 2, 4, 5 1.8 V 3 3.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Bluetooth Bluetooth provides a fully digital link for communication between a master unit and one or more slave units. The system provides a radio link that offers a high degree of flexibility to support various applications and product scenarios. Data and control interface for a low power RF module is provided. The transmission is half-duplex. Air bit rate is 812.5 kbit/s. IR NHL-2NA BB uses TDFU5102 1Mbit IrDA 1.1 compatible module.
System Module LG4 and Grip Module LS4 CCS Technical Documentation NHL-2NA Audio Concept NHL-2NA Audio's includes Earpiece, microphone, and headset connector, Integrated Handsfree (IHF) with proximity sensing. IHF have high quality Audio with DCT4 Enchantments. Headset is DCT4 monoheadset with/-out button. For IHF versus Earpiece function there is proximity sensor option, which detects if close to head, it switches IHF off. It can be turned ON Manually by pressing the voice key.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Microphone The microphone capsule for NHL-2NA is a WM64MN capsule. Its sensitivity is -41db Nominal and it's provided encapsulated in housing of neoprene. Contacts are done by springs. Two inputs are used from UEM, one for normal internal microphone and a second for headset. The third microphone input is not used, so it must connected to ground.
System Module LG4 and Grip Module LS4 CCS Technical Documentation External Audio interface In NHL-2NA there is Headset Connector which is fully differential 4–wire connection. Figure 13: External Audio Connector 2. XEARN 4. XEARP 5. HEADINT 3. XM ICP 1. XM ICN The Handsfree (HF) driver in UEM is meant for headset. In NHL-2NA case the output is driven in fully differential mode. In the fully differential mode HF pin is the negative output and HFCM pin is the positive output.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Proximity Sensor Proximity Detector is used to deactivate IHF when something is close to the phone. Proximity detection is based on detecting level of reflected IR radiation. Detection distance varies depending on the reflecting surface. System is calibrated to detect 20% diffuse reflectance targets, parallel to the phone, at 50mm distance. Detection distance may change due to wearing; minimum detection distance allowed is 30mm.
System Module LG4 and Grip Module LS4 CCS Technical Documentation comparators with adjustable thresholds in the receiver. Proximity detector block enables several pulse width and pulse frequency selections and emitter current can be controlled with a current sensing resistor. In NHL-2NA emitter current is 100mA, pulse width 8Ps and pulse frequency 500/2000Hz.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Figure 16: Proximity sensor implementation VTOUCH (2.78V) VANA (2.78V) VBAT AEM IRED PRXdrv PRXin 4.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Ambient Light Sensor Ambient Light Detector (ALD) is used as a power saving feature. Ambient Light Detector (ALD) measures illuminance on the display (ambient light). User can select the limit, above which display backlight is not needed. In practice, two limits are used in software to produce hysteresis. Hysteresis is needed to prevent backlight from blinking. Backlight can be switched ON only when ambient light level is below lower limit.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Flashing SW download in service is impelemented by custom tools and SW, kindly refer to Service Software Instructions and Service Tool section of the manual. Connections to Baseband NHL-2NA type flash programmer FPS-8 is connected to the baseband directly in Production Tester, by using service cable and FLA-21 or Module jig to connect to test pads. With assembled devices the testpads can be accessed by opening the grip with a special tool.
System Module LG4 and Grip Module LS4 CCS Technical Documentation 4 BSI (accessed from battery connector) 5 Vcc (accessed from battery connector) 6 Ground (accessed from test pad pattern and battery connector) 7 Vpp (accessed from test pad pattern) In HDB15 BB Vpp routing is based on common DCT4 solution. In this solution the use of higher Vpp voltage is enabled at FLALI phase in production and in after sales if so wanted.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Table 2: Electrical Specifications for Power Supply Interface in Prod Testing Pin Name Min Typ Max Unit Notes 1 VBAT 0 3.6 5.1 V 2 BSI 0 2.78 VFlash1 V Internal pullup 3 BTEMP 0 3.0 VAna V Internal pullup 4 GND 0 V Note 1: VAna & VFlash1 = 2.78 +/-3% Extreme Voltages Lithium-Ion battery BLB-2 (1 cell): • • • Nominal voltage is 3.6V Lower extreme voltage is 2.8V (cut off voltage) Higher extreme voltage is 4.
System Module LG4 and Grip Module LS4 CCS Technical Documentation RF Module Functional block descriptions The block diagrams of direct-conversion receiver and transmitter RF section are described in the following figure. The illustration shows the RF-IC ( both RX and TX functions ), power amplifier ( PA ), TX-SAW filter, VCO, VCTCXO module, discrete LNA stages and SAW-filters for receive bands.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Figure 20: Phase locked loop HAGAR GSM1800 E-GSM900 3420 - 3840 MHz O2 O4 O64/65 NDIV ADIV M Charge Pump Loop Filter VCO RDIV ( O65 ) AFC 26 MHz Reset SLE SCLK SDATA CTRL The SHF local signal generated by a VCO module is fed into prescaler. The prescaler is a dual-modulus divider. The output of the prescaler is fed to N- and A- divider which produce the input to phase detector.
System Module LG4 and Grip Module LS4 CCS Technical Documentation The baseband circuitry is located on the A-side of the board, which is shielded with a metallized frame and ground plane of the UI-board. Maximum height inside on B-side is 1.8 mm.
CCS Technical Documentation System Module LG4 and Grip Module LS4 DC characteristics Regulators List of the needed supply voltages : Volt. source VR1a VR2 VR3 VR4 VR5 VR6 VR7 VrefRF01 VrefRF02 Vbatt Issue 2 11/02 Load PLL charge pump (4,8 V) TX modulator VCTCXO + buffer HAGAR IC (LNAs+mixer+DTOS) HAGAR IC (div+LO-buff+prescaler), HAGAR (Vdd_bb) VCO ref. voltage for HAGAR ref.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Power Distribution Diagram Figure 22: Power Distribution Diagram Power Detector E-GSM900/GSM1800 LNA UEM VCTXCO VR1 HAGAR VR2 PLL charge pump TX IQ modulator VR3 VCTCXO buffer VR4 RX Mixer DTOS VR5 PLL Frequency dividers LO buffers VR6 Prescaler VR7 BB section RX reference voltage VREFRF01 Reference voltage VREFRF02 VBATT PA VCO VFLASH01 BT102 Page 38 ¤Nokia Corporation Issue 2 11/02
CCS Technical Documentation System Module LG4 and Grip Module LS4 RF characteristics Item Values (E-GSM / GSM1800) Receive frequency range 925 ... 960 MHz / 1805...1880 MHz Transmit frequency range 880 ... 915 MHz / 1710...
System Module LG4 and Grip Module LS4 CCS Technical Documentation RF Block Diagram Figure 23: RF Block Diagram RF_BB interface RF_RF interface Antenna Switch PA LNA VCO 4 GHz LNA2, Mixer, AGC, DTOS PLL, Dividers Hagar Tx IQ modulator RFtemp TXC Vreg Tx I/Q Rx I/Q Battery Bluetooth 26 MHz 26 MHz UEM RFI and Codec BB & RF regulators Charger switch AFC VCTCXO 13 MHz Data to & from RF RF control lines Codec samples UPP MCU, ASIC & DSP For further information see table on the next page.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Voltage Supplies and References Signal name VBAT From To Parameter Min Typ Max Unit Function Battery PA & UEM Voltage 2.95 3.5 5.15 V 200 0 mA 0.8 2 mA 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 200 nVrms/ sqrt(Hz ) 2.78 2.86 V 65 100 mA 80 55 nVrms/ sqrt(Hz) 2.78 2.
System Module LG4 and Grip Module LS4 VR7 VrefRF 01 UEM UEM UHF VCO VREF_RX Voltage 2.86 V Current 30 mA Noise density 100Hz
CCS Technical Documentation System Module LG4 and Grip Module LS4 Receiver Figure 24: NHL-2NA Receiver chain The receiver is a direct-conversion, dual-band linear receiver. RF signal energy gathered by the antenna is fed via the antenna switch module to the 1st RX bandpass SAW filters and MMIC LNAs. The RF antenna switch module provides for upper- and lower-band operation. The signal having been amplified by the LNA is then fed to 2nd RX bandpass SAW filters.
System Module LG4 and Grip Module LS4 CCS Technical Documentation trol word. The correct control words that compensate for the process variations of integrated resistors and capacitors and of tolerance of off chip capacitors are found with the calibration circuit. The next stage in the receiver chain is AGC-amplifier, also integrated into HAGAR. AGC has digital gain control via serial mode bms.
CCS Technical Documentation System Module LG4 and Grip Module LS4 AGC strategy The AGC-amplifier is used to maintain the output level of the receiver in within a certain range. The AGC has to be set before each received burst with pre-monitoring or without pre-monitoring. In pre-monitoring, the receiver is switched on roughly 130µs before the burst begins, DSP measures received signal level and adjusts AGC-amplifiers via serial bus.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Figure 25: Gain control of E-GSM900 6 +4 B +6 dB d -4 +6 dB dB +1 6 dB +2 6 dB +3 6d B -4 dB ADC input voltage [ mVp-t-p ] LNA gain = +18dB ( E-GSM900 ) LNA gain = -7dB ( E-GSM900 ) DtoS gain = ? dB DtoS gain = ? dB Accurate gain control region Accurate RSSI requirment range -110 -100 Receiver chain gain [ dB ] 64 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 RF signal [ dBm ] 18+46=64 18+36=54 54 18+26=44 44 18+16=
CCS Technical Documentation System Module LG4 and Grip Module LS4 Figure 26: Gain control of GSM1800 6 +4 B +6 d B +1 6d B d -4 +6 dB dB +1 6 +2 6 +3 6 dB dB dB -4 dB ADC input voltage [ mVp-t-p ] LNA gain = +19dB ( GSM1800 ) LNA gain = -11dB ( GSM1800 ) DtoS gain = ? dB DtoS gain = ? dB Accurate gain control region Accurate RSSI requirment range -110 -100 Receiver chain gain [ dB ] 65 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 RF signal [ dBm ] 19+46=65 19+36=55 55 19+26=45
System Module LG4 and Grip Module LS4 CCS Technical Documentation for the RC-network comes from signaling, i.e. how often PSW slots occur. They are repeated after 10 frames. The AFC tracks the base station frequency continuously which enables the transceiver to have a stable frequency reference. The settling time requirement is also determined from the allowed start up-time. When the transceiver is in sleep mode and ”wakes-up" to receive mode, there is only about 5 ms for the AFC voltage to settle.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Figure 27: Power control feedback loop with analogue temperature compensation POWER AMPLIFIER GSM1800 L749 Directional Coupler VpdDCS VANT_1 & VANT_2 VtxBDCS E-GSM900 Antenna Switch VpdGSM R730 47R VtxBGSM C803 1p8 C731 27p R804 4k7 R801 22k VPCTRL_FB HAGAR RFIC V760 Detector diode R764 4k7 C761 12p VTX_B_G VTX_B_P R763 100 R800 4k7 C762 12p DET R803 10k C802 2n2 EGSM900 VPCTRL_G + R746 47R C757 10n GSM1800 VPC
System Module LG4 and Grip Module LS4 CCS Technical Documentation Grip Module Abbreviations AEM DC GND GPIO HW IF LED MCU P(0) P(1) PWB PWM SD_ UEM UPP_WD2 Auxiliary Energy Management Direct Current Ground General Purpose Input Output Hardware Inter Face Light Emitting Diode Micro Controller Unit Column Port Row Port Printed Wired Board Pulse Width Modulation Shut Down (active low) Universal Energy Management Universal Phone Processor Wireless Data 2 Introduction The grip consists of Matrix keyboard, Vi
CCS Technical Documentation System Module LG4 and Grip Module LS4 Figure 28: Construction of the Grip. Grip cover Battery connector Vibra BoBo connector Grip keymat Magnet Grip keymat cover DC jack Locking latch Current gauge & Current pump Grip PWB (Matrix Keyboard & Backlight) Screws All test pads are shown in a figure below. The pin numbers of the connector X001 are described in generally (1, 25, 26 and 50). Signals of the test pins can be seen on a next page.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Table 3: Signals and number of test pad Signal Test pad Vbat J001 IPWM J008 ISD J007 VCHAR J019 BATGND J020 Col3 J005 Col2 J016 Row2 J015 Row3 J014 Row4 J013 Row5 J012 Called1 J021 Col4 J009 Btemp J003 Col5 J022 Vibra J017 BSI J002 Figure 30: Bottom side of the grip PWB BATGND VIBRA PADS BTEMP DC-JACK PADS CallLED1 PAD BSI VBAT Page 52 ¤Nokia Corporation Issue 2 11/02
CCS Technical Documentation System Module LG4 and Grip Module LS4 General Interface between Grip and Transceiver Note: The table below is for your convenience. Table 4: Table 1. Signals between LG4 and LS4 Pin LG4 Pin LS4 Signal Name 1 25 BATGND 2 3 4 Connected from-to Signal Properties (Typ.) A/D - Levels –FRQ./Timing resolution Description / Note LG4 LS4 Ana 0 DC 24 LG4 LS4 Ana 0 DC 27 23 LG4 LS4 Ana 0 DC 28 22 LG4 LS4 Ana 0 DC 29 LS4/LG4 LG4/LS4 Ana 0 - 4.
System Module LG4 and Grip Module LS4 16 14 14 VIBRA 36 CCS Technical Documentation LS4 Ana 0 DC LG4 LS4 Ana 0 - 4.2 V DC LG4 LS4 Ana 0 - 4.2 V DC 35 Vibra Control 37 15 15 37 COL5 LS4 LG4 Dig 0 - 1.8 V DC Keyboard Column signal 14 16 38 Called1 LG4 LS4 Ana 0 - 4.2 V DC Keyboard lights Control 13 13 38 17 39 Col2 LS4 LG4 Dig 0 - 1.8 V DC Keyboard Column Signal 12 18 40 Col3 LS4 LG4 Dig 0 - 1.
CCS Technical Documentation 50 30 31 System Module LG4 and Grip Module LS4 LG4 LG4/LS4 Ana 0 - 4.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Grip Keyboard The grip keyboard interface requires 8 programmable GPIO pins, Figure 6. Construction of a GPIO in UPP_WD2. These pins can be configured as Inputs (ROW), Outputs (COLUMN). NHL-2NA is supporting 4x4 = 16 keys (ROWS X COLUMNS). NHL-2NA's grip uses 16 keys. The interface has a 4-bit row common I/O port (P1) and a 4-bit column common I/ O port (P0) to fulfill the keyboard interface functions.
CCS Technical Documentation Key5 1 Key6 2 Key7 3 Key8 0 Key9 4 Key10 5 Key11 6 Key12 Send Key13 7 Key14 8 Key15 9 Key16 End System Module LG4 and Grip Module LS4 Unit limits Table 6: Unit limits Unit Min. Nom. Max. Pull up voltage, in UPP_WD2 (Measured from RowXX in) 1.65 V 1.8 V 1.95 V Vibra The NHL-2NA grip module includes a vibra. The Nokia code is available in the spare part list. Electrical interface Vibra needs one line from flex for operating. The line is VIBRA.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Figure 35: Electrical interface of Vibra Principle figure of the driver in UEM Vbat B o B o C O N N E C T O R PWM LG4 board Vbat VIBRA line M 33nF 2.2uF LS4 board Table 7: Electrical properties of the VIBRA signal Unit Min Nom Max Current via vibra 50 mA 80 mA 135 mA Vbat 3.0 V 3.7 V 4.
CCS Technical Documentation System Module LG4 and Grip Module LS4 Current Gauge The current gauge is placed to the positive battery line terminal so that all current flow in either direction is registered. See Electrical-implementation of the current gauge. The LM3822 component is well suited for the purpose since its serial resistance is only 3 mW and it has a PWM output. The current value and direction are indicated by the duty cycle of the PWM signal. Shutdown is controlled with a specific pin.
System Module LG4 and Grip Module LS4 CCS Technical Documentation TEST IPWM Vbat Sense - active HIGH Output Ground 6 AEM 7 Transceiver Vbat Figure 37: Electrical-implementation of the current gauge Battery B a t t e r y C o n 1 100n 8 2 NATIONAL's Current meter component LM3822 3 100n 8 4 7 6 5 B o B o C o n Vbat IPWM ISD BATGND Note: BATGND is the ground of the grip, not charger ground Page 60 ¤Nokia Corporation Issue 2 11/02
CCS Technical Documentation System Module LG4 and Grip Module LS4 Backlight NHL-2NA grip keyboard uses six white backlight LEDs. These LEDs are “smart LEDs” (0.6mm height). The LED type is LWL88S, NMP code 4860331. NHL-2NA grip uses brightness groups M1-M2, N1-N2 and P1. There is only one brightness group in one grip-module. Electrical interface The idea is to connect these six LEDs parallel. LEDs are using current that is taken from battery voltage.
System Module LG4 and Grip Module LS4 CCS Technical Documentation Hall Sensor and Magnet NHL-2NA uses the Infineon Hall sensor TLE 4917 (NMP code 4341087) and magnet to find out the open/close position of the grip. The hall sensor component is in the transceiver unit and the magnet is in the grip module. See figure 9 for more information. Magnet NHL-2NA magnet (NMP code 6490201) locates on grip module.
CCS Technical Documentation System Module LG4 and Grip Module LS4 DC Jack and Battery Connector Grip has battery connector (NMP code 5400255), DC-jack (NMP code 5400251) and board to board connector (NMP code 5460059). Signals of the battery connector and DC jack are described in table below. See also Table 1. Signals between LG4 and LS4. NHL2NA uses BLB-2 battery. NOTE: Table below is for your convenience. Table 10: Battery connector signals.
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