Pscld N Control

The PSCLD, N301 is connected to the baseband common serial control bus, SC0NB(5 0). This bus is a serial control bus from the ASIC, D151 to several devices on the baseband. This bus is used by the MCU to control the operation of N301 and other devices connected to the bus. N301 has two internal 8 bit registers and the PWM register used for charging control. The registers contain information for controlling reset levels, charging HW limits, watchdog timer length and watchdog acknowledge. The...

Pscld N External Components

N301 performs the required power on timing. The PSCLD, N301 internal power on and reset timing is defined by the external capacitor C330. This capacitor determines the internal reset delay, which is applied when the PSCLD, N301 is initially powered by applying the battery. The baseband power on delay is determined by C311. With a value of 10 nF the power on delay after a power on request has been active is in the range of 50-150 ms. C310 determines the PSCLD, N301 internal oscillator frequency...

Power Up Sequence

This is the most common way to power the system up. This power up is successful if the battery voltage is higher than power on reset level set by the MCU, default value 5.5V in PSCLD, N301. The power up sequence is started when the power on input pin 25 at PSCLD is activated, low. The PSCLD then internally enters the reset state where the regulators are switched on. At this state the PWM output from PSCLD is forced active to support additional power from any charger connected. The sleep control...

MCU Flash Loading

The flash loading equipment is connected to the baseband by means of the test connector before the module is cut out from the frame. Updating SW on a final product is done by removing the battery and connect a special battery that contains the necessary contacting elements. The contacts on the baseband board are test points that are accessable when the battery is detached. The power supply for the base band is supplied via the adapter and controlled by the flash programming equipment. The base...

Baseband AD Converter Channels usage in N and D

The auxiliary A D converter channels inside RFI2, N450 are used by MCU to measure battery voltage. The A D converters are accessed by the DSP, D152 via the ASIC, D151. The required resolution is 10 bit. The MCU has 4 10 bit A D channels which are used for baseband voltage monitoring. The MCU can measure charger voltage, battery size, battery temperature and accessory detection by using it's own converters. Technical Documentation System Module Baseband N450 A D Converter Channel Usage Name...

External Audio

The external microphone audio signal is applied to the baseband system connector and connected to the audio block using signals XMIC and SGND. In order to improve the external audio performance the input circuitry is arranged in a sort of dual ended. A wheatstone type of bridge configuration is created by resistors R216, R217, R219 and R220. The signal is attenuated around 20 dB to not cause distortion in the microphone amplifier. The microphone signal is attenuated by resistors R216, R207 and...

Battery Temperatur Measurement

The battery temperature is measured during charging. The BTEMP pin to the battery is pulled up on baseband by a 47 kohm resistor to logic supply voltage, 3.2V. The voltage on the BTEMP pin is a function of the battery pack temperature. Auxiliary A D channel 3 is used for this purpose. Inside the battery pack there is a 47 kohm NTC resistor to ground. The A D converter value can be calculated from the following formula where RNTC is the value of the NTC resistor inside the battery pack. The...

Nhenhk Accessory Overview Contents

View of Fast & Light Chargers Basic Stand CGH-2 Product Code View of Basic Stand Desktop Stand CGH-1 Product Code View of Desktop Stand Phone Holder MBT-2 Product Code View of Phone Holder Basic Handsfree Unit PHF-5 Product Code View of Compact Handfree Unit Mounting Plate MKE-7 Product Code View of Mounting Plate Swivel Mounting Plate HHS-7 Product Code View of Swivel Mounting Plate Universal Mobile Charger LCH-6 Product Code View of Universal Mobile Charger Fixed Mobile Charger LCM-1...

SIM Interface

The SIM interface is the serial interface between the smart card and the baseband. The SIM interface logic levels are 5V since no 3V technology SIM is yet available. The baseband is designed in such a way that a 3V technology SIM can be used whenever it is available. The SIM interface signals are generated inside the ASIC. The signals coming from the ASIC are converted to 5V levels. The PSCLD circuit is used as the logic voltage conversion circuit for the SIM interface. The PSCLD circuit also...

Desktop Stand CGH

The desktop stand provides mounting place for both the phone and a spare battery. Charging order is the phone battery first, and then the spare battery. Check the charging status of the phone battery on the phone display. Compatible with all battery options, the desktop stand is used together with the standard charger or fast & light charger. Charging times for the 470 mAh battery are approximately 45 min or 2 h 30, respectively. In addition, the desktop stand offers a discharging facility...

Charging Control Switch Functional Description

The charging switch transistor V304 controls the charging current from the charger input to the battery. During charging the transistor is forced in saturation and the voltage drop over the transistor is 0.2-0.4V depending upon the current delivered by the charger. Transistor V304 is controlled by the PWM output from N301, pin 23 via resistors R309, R308 and transistor V303. The output from N301 is of open drain type. When transistor V304 is conducting the output from N301 pin is low. In this...

Nhe Gsm Service Manual Order Form

Please indicate on the form below the booklets required for your Service Manual and the total number of manuals required. NHE-5 SERIES SERVICE MANUAL - COMPLETE Disassembly Troubleshooting Instructions Total number of Service Manuals required Against Purchase Order Number Please return to Technical Documentation NHE-5 NHK-5 INSTALLATION INSTRUCTIONS

Rssi Agc command

Alt, T, R Open RSSI Calibration dialog box The following are automatically selected when this tuning function is activated The measurement is started automatically when RSSI calibration is entered. The measurement is done in five steps 1. The user is requested to set signal generator to low input level (read from .INI file). 2. Measurement with low input level is executed. 3. The user is requested to set signal generator to high input level (read from .INI file). 4. Measurement with high input...

Battery Voltage Measurement

The battery voltage is measured using RFI2, N450 A D converter channel 0 and 7. The converter value supplied from channel 7 is measured when the transmitter is active. This measurement gives the minimum battery voltage. The value from channel 0 is measured when the transmitter is inactive. The battery voltage supplied to the A D converter input is switched off when the baseband is in power off. The battery voltage measurement voltage is supplied by PSCLD, N301 which performs scaling, the...

Charger Voltage Measurement

The charger voltage is measured to determine the type of charger used. MCU A D converter channel 1 is used for this purpose. The input circuitry to the charger measurement A D channel implements an LP-filter. The input voltage must be scaled before it is fed to the A D converter input. Due to the high input voltage range scaling is performed outside PSCLD, N301. The scaling factor required is 22 (22+100) 0.18. The charger voltage measurement switch is integrated into PSCLD, N301. Charger...

Block Diagram

Handset microphone preamplifier, ref 510 519 Av 17 dB HF microphone preamplifier, ref 500 509 Av 10 dB Handset capsule amplifier, ref 430 439 Av 0 dB Speaker amplifier, ref 460 469 Av 21 dB, Po 50 mW nom 3 Vrms max Handset microphone preamplifier, ref 510 519 Av 17 dB HF microphone preamplifier, ref 500 509 Av 10 dB Handset capsule amplifier, ref 430 439 Av 0 dB Speaker amplifier, ref 460 469 Av 21 dB, Po 50 mW nom 3 Vrms max 2V 2V and 4V VSTAB regulation, ref 250 259 2V 2V and 4V VSTAB...

Fixed Mobile Charger LCM

The fixed mobile charger powers your phone from the car battery when the ignition is switched on and leaves the cigarette lighter vacant. You can use the fixed mobile charger in any vehicle with a 12 or 24 V d.c. connection, negative grounding. The charging time for the 470 mAh battery is only about 45 minutes. Fixed mobile charger housing has a four pin connector for power cable, and on the opposite end a connector for the output cable, which connects the fixed mobile charger directly to the...

Basic Handsfree Unit PHF

The basic handsfree unit enables the phone to operate in handsfree mode. The unit is attached to the vehicle interior using mounting plate MKE-7, or swivel mounting plate HHS-7. A temporary installation can be achieved using the installation belts. Power is supplied either from the vehicle battery via the fixed mobile charger or from the cigarette lighter socket via the universal mobile charger. The basic handsfree unit provides the power supply to the phone via the system connector. The...