Huawei U8860 Maintenance Manual page 35

U8860
Maintenance Manual
Subsystem Module
Baseband MSM8255
subsystem
Environment
monitoring
(PM8058)
EMMC
DDR2 RAM
(POP)
RF Transmission and
subsystem receiving of
WCDMA and
GSM/DCS
GPS
BT interface
WiFi interface
Issue 1.0 (2011-11-14)
Unit
Modem subsystem
Application
subsystem
User interface
processing unit
Multimedia and
game engine
Power supply
voltage monitoring
Temperature
monitoring
EMMC feature,
power consumption,
file system support
Memory
AFC circuit, APC
circuit, AGC
circuit, each
component
GPS receiving
BT module
WiFi chip
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
9 Principles and Troubleshooting
Function
As a MODEM processor, the ARM11 is 400 MHz,
performing the modulation and demodulation of
WCDMA, GPS, and GSM. The subsystem includes
ARM11 processor, modem DSP, modem AHB bus,
interruption controller, and sleep controller.
The Scorpion processor is 1400 MHz, supporting
function modules such as microSD card, EBI2,
UART/USIM, I2C, GPIO, and clock. The
subsystem includes ARM11 processor, application
DSP, and dedicated data mover.
Camera interface, PCM interface, broadband
CODEC, Vocoder, RF interface, HKADC, LCD
interface, SD interface, USB interface, UART
interface, USIM card interface, SBI interface,
GPIO, JTAG/ETM interface, and keypad interface
The multimedia and game engine of the MSM8255
runs Mpeg/jpeg hardware engine and game engine,
JAVA accelerator, and provides MP3/MMS/MIDI
functions.
Lists monitoring targets, such as external power
input, battery, button battery, VDD-phone, and
important LDO.
Battery temperature, PA temperature, and 19.2
MHz crystal oscillator temperature
Stores programs and NV items, 4 GB
RAM for program running, 2 GB (64M×32)
Performs the RF function of WCDMA receiving
and transmission, mainly includes QTR8615 RF
chip and its peripheral circuit.
Receives and processes GPS signals, mainly
including QTR8615 chip and its peripheral circuit.
Transmits and receives the baseband function and
RF signal of Bluetooth and WLAN, mainly
includes BT + WiFi module and its peripheral
circuit
Uses BCM4329 chip to perform the WiFi function.
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