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SIM card，LCD backlight and so on；
MT6166 is radio-frequency signal transceiver chip. Complete up and down RF
signal transformation.
According to logical function, veneer can be divided into base band、RF、power
and user interface including four subsystem. Each subsystem including module and
cell and realized function as show in picture.
subsystem Module
MT6572
Baseband
subsyste
m
power
management
（MT6323）
NAND
DDR1
（POP）
WCDMA
GSM/DCS
launch receiver
RF
subsystem
GPS
BT connector
2013-10-18
YU220 service manualV1.0
Unit
Modem subsystem
Application
subsystem
User
interface
processing unit
Multi-media
game engine
Power
voltage
supervisory
Temperature
monitoring
NAND
features
consumption、 file
system support.
RAM
Storage
AFC circuit, APC
and
，
circuit
AGC
，
circuit
device
GPS receive
BT module
Huawei secrets, no dispersion without permission
Function
ARM Cortex-R4 service as MODEM treater ，
1.2GHZ, complete WCDMA ， GPS ， GSM
modulation-demodulation
includes ARM treater ， modem DSP ， modem
AHB trunk, interrupt controller, and dormant
controller and so on.
NEON media processing engine, support SD card,
UART
/
USIM,
other functional modules, subsystems, including
ARM processors, application DSP, dedicated data
mover and so on.
connector 、 broadband
Camera
Vocoder 、 RF connector 、 LCD connector 、 SD
connector、USB connector、UART connector、
USIM card connector、GPIO、keypad connector
and so on.
and
Multimedia
and game
jpeg hardware engine, MP3/MMS/MIDI function;
External power
VDD, so important for the LDO
Battery temperature、PA temperature
Stored program and some NV,4Gb
RAM space run, 2Gb (64M × 32)
Complete WCDMA receive
section functions. Mainly
each
additional MT6166 RF chip and peripheral circuits.
GPS signal receiving and processing, including its
peripheral additional circuitryMT6627
Bluetooth and
WLAN complete baseband functionality and
function,
subsystem
I2C,
GPIO,
clock
CODEC 、
engine running Mpeg
input, battery,
and
transmit RF
contains
and
/
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