[Feature phone系列]手机芯片结构介绍

目前市场上我们听到MTK,展讯,晨星,互芯等方案提供商，他们提供的某一型号的手机芯片处理器.

实际上该手机芯片由三部分芯片封装到一起：

上电顺序：ABB->DBB->RF

1>数字基带处理器[DBB]

双处理器:[Ex]

– 104-MHz ARM7TDMI  microprocessor unit (MPU)

– 104-MHz digital signal processor 

内置存储器:

– 154KW DSP read-only memory (ROM)

– x0KW DSP static random-access memory (SRAM)

– 2.xMb MPU SRAM

– 1.xMb MPU ROM

外置存储器支持:

– 1.8/3 V subscriber identity module (SIM) I/F

– Direct memory access (DMA) to external memory

– Burst mode, page-mode external memory: NAND and NOR flash and SRAM (frame buffer)

Hardware security

– Flash content

– International mobile equipment identity (IMEI) protection

– SIM lock

·外围接口:

– Vibrator PWM control signal

– Universal serial bus (USB) 2.0 full-speed client

– Keypad

– Universal asynchronous receiver/transmitter (UART)

– Multichannel serial interface (MCSI)

– Bluetooth

– Camera

– Primary liquid-crystal display (LCD)

– Secondary LCD

DRP2.0 RF integrated RF:

– Digital RF 4 band GSM/GPRS up to Class 12

– –110 dBm sensitivity

– Digital PA driver output level +2 dBm

– 0.7 degrees RMS phase error

– Integrated digitally controlled crystal oscillator (DCXO)

软件支持:

– GSM/GPRS layer 1,2,3 

– Adaptive multirate (AMR), full rate (FR), half rate (HR), enhanced full rate (EFR)

– Teletypewriter (TTY)

– SAIC over GSM

– Man machine interface (MMI)

– Wireless application protocol (WAP), enhanced message service (EMS), multimedia message service (MMS), JAVA

 多媒体支持:

– Internal 300 KP camera support

– MP3 player

– Up to 32 polyphonies stereo midi player

– Up to 32 polyphonies mono midi ringer

– JPEG encode and decode

2>RF

3>模拟基带处理器[ABB],也称为"应用处理器"

模拟基带提供下面功能：
   Handset microphone and speaker
   Headset mono/stereo audio speakers and microphone connection
   Melody ringer (hands-free) and buzzer
   Battery pack and six 7-V regulated or 20-V nonregulated charger
   Vibrator motor control
   Real-time clock (RTC) 32-kHz crystal
   USB 2.0 OTG transceiver with a carkit interface
   SIM卡检测
   I2C接口
   JTAG和边界扫描
   电源管理
   监控系统[监控温度,电压等]

DBB和作为子系统的ABB之间进行通信。