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by finnce MOTO MPx220 與Dopod 575/585 之內(nèi)核CPU的比較

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MPx220 與 575正是棋逢對手的兩款SP手機 ， 性能價位都差不多 ， 因此在論壇上也是多有爭論 。這里 ， 把兩款手機的CPU做個比較 。文章內(nèi)容來自TI的網(wǎng)站 ， 可以參考以下網(wǎng)址:OMAP730:http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?templateId=6123&navigati "http://bible.younet.com//add.php?edit_act=pic&id=67833" width=400 border=1>
OMAP1611:
看來兩款芯片的總體構(gòu)架相似 ， 有相同的核心子系統(tǒng)(Core Subsystem),主要在DSP（數(shù)字信號處理）部分不同 。
我們來比較一下兩種芯片的概述：
730：
The OMAP730 is a single chip that integrates a ARM926EJ-S? core for application processing and TI’s GSM/GPRS digital baseband modem. The OMAP730 offers twice the application performance over the previous generation while doubling the standby time for handsets, smartphones and PDAs. It is intended for high-volume wireless OEMs and ODMs and is not available through distributors.
1611：
The OMAP1611 processor is a single-chip application processor that supports all cellular standards, and complements any modem or chipset and any air interface. It is intended for high-volume wireless OEMs and ODMs and is not available through distributors.
主要內(nèi)容差不多 ， 不必細看 。
由于采用相同的 ARM926TEJ Core Subsystem核心子系統(tǒng) ， 所以兩種芯片的總體系能也相差不大 。
這是兩種芯片相同的概述：（低功耗 ， 高性能的CMOS技術(shù)）：
Low-Power, High-Performance CMOS Technology
Low-voltage 130 nm technology 1.1 - 1.5V cores, 1.8 - 2.75V IO Extremely low power consumption: less than 10 礎(chǔ) in standby mode Split power supplies for application processing, digital baseband and real-time clock enable precise control over power consumption Optimized clocking and power management: Only two clocks required at 13 MHz and 32 kHz ARM內(nèi)核部分是這樣說的：
ARM926TEJ Core Subsystem
ARM926EJ-S V5 architecture up to 200 MHz (maximum frequency) 16 kB I-cache; 8 kB D-cache Java acceleration in hardware (都有Java 硬件加速） Multimedia instruction set architecture (ISA) extension接下來 ， 我們看看不同的DSP子系統(tǒng)部分( DSP SubSystem)
730采用幾個子系統(tǒng)組合而成 ， 從圖上我們可以看到ARM7 MCU和TMC320C 。注意 ， 其中有個MCU(微控制單元)
GSM/GPRS Digital Baseband Subsystem
Class 12 GPRS ROM-based DBB E-GPRS interface for EDGE co-processor 384 K-bytes internal SRAM E-OTD and TTY support Quad vocoder with EFR, FR, HR, AMR GSM ultra-low power device (ULPD) SIM interface而1611則是相對集成的子系統(tǒng)TMS320C55x ， 可以看出 ， 比730少了個MCU 。
TMS320C55x DSP core subsystem
Up to 204 MHz (maximum frequency) 32K x 16-bit on-chip dual-access RAM (DARAM) (64 KB) 48K x 16-bit on-chip single-access RAM (SARAM) (96 KB) 24 KB I-cache One/two instructions executed per cycle Video hardware accelerators for DCT, iDCT, pixel interpolation, and motion estimation for video compression ARM926TEJ core subsystem
接下來看看應(yīng)用子系統(tǒng)：
730：
Application Subsystem
Supports all leading operating systems DMA with 4 physical and 17 logical channels and a dedicated 2D graphics engine Programmable GPIO keyboard interface 54-Mbps WLAN interface Security acceleration in hardware: Secure bootloader 48 kB of secure ROM 16 kB of secure RAM Hardware acceleration for security standards and random number generator Unique die ID cell Third-party Security software library Enhanced audio controller (EAC) Comprehensive memory controller for interfaces to: 128 MB of mobile SDRAM 256 MB Flash NAND Flash controllers 1.6 Mb ISRAM SD/MMC/SDIO interface Enhanced Trace Module for debug LCD controller uWire SPI 1-wire and HDQ interface Bluetooth data/audio interface USB On-the-Go Two high-speed 3.68 MHz UARTs Fast IrDA (FIR) Two 32-bit timers Parallel camera port Programmable three-color LED pulse generation I睠 master/slave controller SmartCard interface 1611：

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