Difference between revisions of "UEM"

Latest revision as of 14:52, 24 November 2010

What is UEM?

UEM description[edit]

In the UEM, there are several important roles as the Energy Management Ponsel. Unlike the Nokia DCT3, UEM is some combination of ASICs, such as: CCONT, COBBA, chaps and UI DRIVERS.

UEM stands for Universal Energy Management, in accordance with his name, UEM has several functions that are very complex, including:

Crystal oscillator (32 kHz) Each system Ponsel akan Oscilator found that the small beat was able to 32KHz,. UEM that will provide voltage control and Crystal Oscilator to be next to the UPP.

32 kHz RC oscillator Startup When the phone is in the Power-down, from the RF Processor Clock can not be given to UPP, so the phone can power-up needed for Logic System Clock to the UPP. Required for this purpose Sleep Clock generated by Crystal Oscilator 32 kHz.

Real time clock logic Clock, Date, Alarm Clock Logic required given by Cristal Oscilator 32kHz.

Regulator Baseband & RF UEM is given by the main battery voltage of 3.7 Volt (VBATT). UEM has role as distribution voltage / regulator to the system based on the needs of all the required voltage on each system.

Baseband Regulator: ? VCORE, the need for programming voltage around 1.0 - 1.8 Volt - 200mA to UPP (VCORE DSP & VCORE MCU) ? vana, to provide voltage of 2.8 Volt - 80mA analog system to function (Btemp, VCXO Temp) ? VIO, give tengan of 1.8 Volt - 150mA for Logic I / Os (Input / Output Logic: Level Shifter MMC, IR, IC & Flash SDRAM, Bluetooth, LCD,) and UEM Logic. ? VFLASH1, to provide primary voltage of 2.8 Volt - 70mA to IR, Bluetooth, LCD, LED drivers and voltage to the BSI. ? VFLASH2/VAUX, to provide voltage of 2.8 Volt - 40mA for FM Radio and other Accesories. ? VSIM, provide voltage of 1.8 - 3.0 Volt - 25mA for SIM Card

Regulator RF: ? VR1, to provide voltage of 4.75 Volt - 10 mA to the VCP ? VR2, provide voltage of 2.78 Volt - 100 mA to: VRF_TX, MODOUTP_G_TX, MODOUTM_G_TX, MODOUTP_P_TX, MODOUTM_P_TX, ? VR3, to provide voltage of 2.78 Volt - 20 mA to: VDIG, Clock Out VCTXO (Osc 26MHz) ? VR4, provide voltage of 2.78 Volt - 50 mA to: VRF_RX, VF_RX, VPAB_VLNA ? VR5, provide voltage of 2.78 Volt - 50 mA to VPLL, VLO, VPRE, ? VR6, provide voltage of 2.78 Volt - 50 mA to VRXBB ? VR7, to provide voltage of 2.78 Volt - 45 mA to: VCO,

Charging functions Battery Ponsel charging process is controlled by UEM. UEM has been store inside Charging Control that serves as the battery charging process. Mobile phone will automatically disconnect from the current to the battery charger when the battery voltage has reached the maximum voltage Charger although still connected to the Mobile, Battery voltage if the voltage under the maximum flow from the charger will continue to be given to the Battery.

11-channel A / D converter (MCU controlled) UEM stored in the 11Channels Analog to Digital Converter used for the bandgap reference and voltage reference, this section will measure the BSI, Btemp, Vcharge. oBattery Voltage Measurement A / D Channel (Internal) oCharger Voltage Measurement A / D Channel (Internal) oCharger Current Measurement A / D Channel (External) oBattery Temperature Measurement A / D Channel (External) oBattery Size Measurement A / D Channel (External) OLED Temperature measurement A / D Channel (External)

Interface FBUS and MBUS FBUS & MBUS is used to transfer data from computer to mobile phones, such as the process (Flash Programming), File Manager, etc.. The data will then be signed in to UPP and Flash IC. Security Logic (Watchdog) Watchdog stored in the UEM, the first is used for controlling system power-on and power-down. The two blocks used for security and storage IMEI, IMEI Watchdog akan control that is in the ROM with the UEM IMEI stored in the IC Flash, if there is a difference between the IMEI in UEM IMEI and IMEI in Flash then do akan Watchdog Power-Down within 32mS.

FLASH memory for code IMEI UEM is available in the ROM that is used to store data IMEI. Nature of data storage is IMEI OTP (One Time Programming) where IMEI data can be written only once and can not be removed or replaced, because the former UEM IMEI or ever written can not be used to Ponsel the other except when the IMEI is in the IC Flash can be equated with the IMEI that is on UEM (Calulate Flash), this material is described in Chapter akan Software. When the ROM is in the UEM is problematic or Corupt then this is UEM can not be used again and can not be repaired again, will generally display the IMEI ????????? where the IMEI is on UEM IMEI is different from that it should even though there is only one number that is different. IR interface level shifters Used for the driver and the regulator Infra red, data is forwarded to the akn next UPP.

Interface LED, buzzer and vibrator Vibrator, Keyboad LED, LED LCD is controlled by the Driver UI Subsystem resides in UEM. UI commands to the driver is provided by the UPP, UPP only give a very low voltage of the driver is required to provide adequate flow to the Vibrator, Keyboad LED, LED LCD.

Audio codec Earphone, Microphone, IHF Speaker, Handsfree work because there is a subsystem Audio Codec stored on UEM. Subsystem is working to change the data signal into digital signal information Audio, so that the audio signal can be heard by human needs strengthening (Audio Amplyfier) before forwarded to the Speaker and Microphone, Audio signal has frequency of 20Hz to 20kHz.

SIM interface SIM Card is the active components that have a microchip inside, each of the active components required supply voltage to him, voltage SIM card provided by the UEM's Baseband Subsystem Regulator of 1.8 Volt - 3Volt, while the SIM Clock, Reset SIM, SIM I / O data provided through the subsystem interface, which the store has the SIM Interface Detector SIM, SIM and SIM Driver IF IF.

Serial control interface (Cbus & Dbus Controled) This section will control the use of the data transmission interface between the UEM and UPP are applied through CBUS and DBUS to MCU Subsystem stored in the UPP.

Auxiliary A / D converted (DSP controlled) As a tool for bantu konfersi analog signal into digital signal that is used to control DSP Subsystem stored in the UPP, this section will play a role in: Digital Speech Processing and PDM Coded Audio.

RF interface converters We have previously understood that the RF module has the analog signal while Baseband digital characters have, so that the second module is able to sustain one another, needed a conversion or translation signal into analog signal digital (A / D converter) and digital signal into analog signal ( D / A Converter). RF Interface Converter also called Multy Mode Converter which is a series between the RF module with UPP.

See also[edit]

• Nokia UEM ASIC type list