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  • Stellaris(群星)單片機(jī)加上32KB串行SRAM(英

    Stellaris(群星)單片機(jī)加上32KB串行SRAM(英) INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH LUMINARY MICRO PRODUCTS. NO LICENSE,EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THISDOCUMENT. EXCEPT AS PROVIDED IN LUMINARY MICRO’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS,LUMINARY MICRO ASSUMES NO LIABILITY WHATSOEVER, AND LUMINARY MICRO DISCLAIMS ANY EXPRESS OR IMPLIEDWARRANTY, RELATING TO SALE AND/OR USE OF LUMINARY MICRO’S PRODUCTS INCLUDING LIABILITY OR WARRANTIESRELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHTOR OTHER INTELLECTUAL PROPERTY RIGHT. LUMINARY MICRO’S PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL,LIFE SAVING, OR LIFE-SUSTAINING APPLICATIONS.

    標(biāo)簽: Stellaris SRAM 32 KB

    上傳時(shí)間: 2013-11-22

    上傳用戶:lixqiang

  • at91rm9200啟動(dòng)過程教程

    at91rm9200啟動(dòng)過程教程 系統(tǒng)上電,檢測(cè)BMS,選擇系統(tǒng)的啟動(dòng)方式,如果BMS為高電平,則系統(tǒng)從片內(nèi)ROM啟動(dòng)。AT91RM9200的ROM上電后被映射到了0x0和0x100000處,在這兩個(gè)地址處都可以訪問到ROM。由于9200的ROM中固化了一個(gè)BOOTLOAER程序。所以PC從0X0處開始執(zhí)行這個(gè)BOOTLOAER(準(zhǔn)確的說應(yīng)該是一級(jí)BOOTLOADER)。這個(gè)BOOTLOER依次完成以下步驟: 1、PLL SETUP,設(shè)置PLLB產(chǎn)生48M時(shí)鐘頻率提供給USB DEVICE。同時(shí)DEBUG USART也被初始化為48M的時(shí)鐘頻率; 2、相應(yīng)模式下的堆棧設(shè)置; 3、檢測(cè)主時(shí)鐘源(Main oscillator); 4、中斷控制器(AIC)的設(shè)置; 5、C 變量的初始化; 6、跳到主函數(shù)。 完成以上步驟后,我們可以認(rèn)為BOOT過程結(jié)束,接下來的就是LOADER的過程,或者也可以認(rèn)為是裝載二級(jí)BOOTLOER。AT91RM9200按照DATAFLASH、EEPROM、連接在外部總線上的8位并行FLASH的順序依次來找合法的BOOT程序。所謂合法的指的是在這些存儲(chǔ)設(shè)備的開始地址處連續(xù)的存放的32個(gè)字節(jié),也就是8條指令必須是跳轉(zhuǎn)指令或者裝載PC的指令,其實(shí)這樣規(guī)定就是把這8條指令當(dāng)作是異常向量表來處理。必須注意的是第6條指令要包含將要裝載的映像的大小。關(guān)于如何計(jì)算和寫這條指令可以參考用戶手冊(cè)。一旦合法的映像找到之后,則BOOT程序會(huì)把找到的映像搬到SRAM中去,所以映像的大小是非常有限的,不能超過16K-3K的大小。當(dāng)BOOT程序完成了把合法的映像搬到SRAM的任務(wù)以后,接下來就進(jìn)行存儲(chǔ)器的REMAP,經(jīng)過REMAP之后,SRAM從映設(shè)前的0X200000地址處被映設(shè)到了0X0地址并且程序從0X0處開始執(zhí)行。而ROM這時(shí)只能在0X100000這個(gè)地址處看到了。至此9200就算完成了一種形式的啟動(dòng)過程。如果BOOT程序在以上所列的幾種存儲(chǔ)設(shè)備中找到合法的映像,則自動(dòng)初始化DEBUG USART口和USB DEVICE口以準(zhǔn)備從外部載入映像。對(duì)DEBUG口的初始化包括設(shè)置參數(shù)115200 8 N 1以及運(yùn)行XMODEM協(xié)議。對(duì)USB DEVICE進(jìn)行初始化以及運(yùn)行DFU協(xié)議。現(xiàn)在用戶可以從外部(假定為PC平臺(tái))載入你的映像了。在PC平臺(tái)下,以WIN2000為例,你可以用超級(jí)終端來完成這個(gè)功能,但是還是要注意你的映像的大小不能超過13K。一旦正確從外部裝載了映像,接下來的過程就是和前面一樣重映設(shè)然后執(zhí)行映像了。我們上面講了BMS為高電平,AT91RM9200選擇從片內(nèi)的ROM啟動(dòng)的一個(gè)過程。如果BMS為低電平,則AT91RM9200會(huì)從片外的FLASH啟動(dòng),這時(shí)片外的FLASH的起始地址就是0X0了,接下來的過程和片內(nèi)啟動(dòng)的過程是一樣的,只不過這時(shí)就需要自己寫啟動(dòng)代碼了,至于怎么寫,大致的內(nèi)容和ROM的BOOT差不多,不同的硬件設(shè)計(jì)可能有不一樣的地方,但基本的都是一樣的。由于片外FLASH可以設(shè)計(jì)的大,所以這里編寫的BOOTLOADER可以一步到位,也就是說不用像片內(nèi)啟動(dòng)可能需要BOOT好幾級(jí)了,目前AT91RM9200上使用較多的bootloer是u-boot,這是一個(gè)開放源代碼的軟件,用戶可以自由下載并根據(jù)自己的應(yīng)用配置??偟恼f來,筆者以為AT91RM9200的啟動(dòng)過程比較簡(jiǎn)單,ATMEL的服務(wù)也不錯(cuò),不但提供了片內(nèi)啟動(dòng)的功能,還提供了UBOOT可供下載。筆者寫了一個(gè)BOOTLODER從片外的FLASHA啟動(dòng),效果還可以。 uboot結(jié)構(gòu)與使用uboot是一個(gè)龐大的公開源碼的軟件。他支持一些系列的arm體系,包含常見的外設(shè)的驅(qū)動(dòng),是一個(gè)功能強(qiáng)大的板極支持包。其代碼可以 http://sourceforge.net/projects/u-boot下載 在9200上,為了啟動(dòng)uboot,還有兩個(gè)boot軟件包,分別是loader和boot。分別完成從sram和flash中的一級(jí)boot。其源碼可以從atmel的官方網(wǎng)站下載。 我們知道,當(dāng)9200系統(tǒng)上電后,如果bms為高電平,則系統(tǒng)從片內(nèi)rom啟動(dòng),這時(shí)rom中固化的boot程序初始化了debug口并向其發(fā)送'c',這時(shí)我們打開超級(jí)終端會(huì)看到ccccc...。這說明系統(tǒng)已經(jīng)啟動(dòng),同時(shí)xmodem協(xié)議已經(jīng)啟動(dòng),用戶可以通過超級(jí)終端下載用戶的bootloader。作為第一步,我們下載loader.bin.loader.bin將被下載到片內(nèi)的sram中。這個(gè)loder完成的功能主要是初始化時(shí)鐘,sdram和xmodem協(xié)議,為下載和啟動(dòng)uboot做準(zhǔn)備。當(dāng)下載了loader.bin后,超級(jí)終端會(huì)繼續(xù)打?。篶cccc....。這時(shí)我們就可以下在uboot了。uboot將被下載到sdram中的一個(gè)地址后并把pc指針調(diào)到此處開始執(zhí)行uboot。接著我們就可以在終端上看到uboot的shell啟動(dòng)了,提示符uboot>,用戶可以u(píng)boot>help 看到命令列表和大概的功能。uboot的命令包含了對(duì)內(nèi)存、flash、網(wǎng)絡(luò)、系統(tǒng)啟動(dòng)等一些命令。 如果系統(tǒng)上電時(shí)bms為低電平,則系統(tǒng)從片外的flash啟動(dòng)。為了從片外的flash啟動(dòng)uboot,我們必須把boot.bin放到0x0地址出,使得從flash啟動(dòng)后首先執(zhí)行boot.bin,而要少些boot.bin,就要先完成上面我們講的那些步驟,首先開始從片內(nèi)rom啟動(dòng)uboot。然后再利用uboot的功能完成把boot.bin和uboot.gz燒寫到flash中的目的,假如我們已經(jīng)啟動(dòng)了uboot,可以這樣操作: uboot>protect off all uboot>erase all uboot>loadb 20000000 uboot>cp.b 20000000 10000000 5fff uboot>loadb 21000000 uboot>cp.b 210000000 10010000 ffff 然后系統(tǒng)復(fù)位,就可以看到系統(tǒng)先啟動(dòng)boot,然后解壓縮uboot.gz,然后啟動(dòng)uboot。注意,這里uboot必須壓縮成.gz文件,否則會(huì)出錯(cuò)。 怎么編譯這三個(gè)源碼包呢,首先要建立一個(gè)arm的交叉編譯環(huán)境,關(guān)于如何建立,此處不予說明。建立好了以后,分別解壓源碼包,然后修改Makefile中的編譯器項(xiàng)目,正確填寫你的編譯器的所在路徑。 對(duì)loader和boot,直接make。對(duì)uboot,第一步:make_at91rm9200dk,第二步:make。這樣就會(huì)在當(dāng)前目錄下分別生成*.bin文件,對(duì)于uboot.bin,我們還要壓縮成.gz文件。 也許有的人對(duì)loader和boot搞不清楚為什么要兩個(gè),有什么區(qū)別嗎?首先有區(qū)別,boot主要完成從flash中啟動(dòng)uboot的功能,他要對(duì)uboot的壓縮文件進(jìn)行解壓,除此之外,他和loader并無大的區(qū)別,你可以把boot理解為在loader的基礎(chǔ)上加入了解壓縮.gz的功能而已。所以這兩個(gè)并無多大的本質(zhì)不同,只是他們的使命不同而已。 特別說名的是這三個(gè)軟件包都是開放源碼的,所以用戶可以根據(jù)自己的系統(tǒng)的情況修改和配置以及裁減,打造屬于自己系統(tǒng)的bootloder。

    標(biāo)簽: 9200 at 91 rm

    上傳時(shí)間: 2013-10-27

    上傳用戶:wsf950131

  • Keil C51使用詳解

    Keil C51使用詳解Keil C51 是美國(guó)Keil Software 公司出品的51 系列兼容單片機(jī)C 語言軟件開發(fā)系統(tǒng),與匯編相比,C 語言在功能上、結(jié)構(gòu)性、可讀性、可維護(hù)性上有明顯的優(yōu)勢(shì),因而易學(xué)易用。用過匯編語言后再使用C 來開發(fā),體會(huì)更加深刻。Keil C51 軟件提供豐富的庫函數(shù)和功能強(qiáng)大的集成開發(fā)調(diào)試工具,全Windows界面。另外重要的一點(diǎn),只要看一下編譯后生成的匯編代碼,就能體會(huì)到Keil C51生成的目標(biāo)代碼效率非常之高,多數(shù)語句生成的匯編代碼很緊湊,容易理解。在開發(fā)大型軟件時(shí)更能體現(xiàn)高級(jí)語言的優(yōu)勢(shì)。下面詳細(xì)介紹 Keil C51 開發(fā)系統(tǒng)各部分功能和使用。第二節(jié) Keil C51 單片機(jī)軟件開發(fā)系統(tǒng)的整體結(jié)構(gòu)C51 工具包的整體結(jié)構(gòu),如圖(1)所示,其中uVision 與Ishell 分別是C51 forWindows 和for Dos 的集成開發(fā)環(huán)境(IDE),可以完成編輯、編譯、連接、調(diào)試、仿真等整個(gè)開發(fā)流程。開發(fā)人員可用IDE 本身或其它編輯器編輯C 或匯編源文件。然后分別由C51 及A51 編譯器編譯生成目標(biāo)文件(.OBJ)。目標(biāo)文件可由LIB51 創(chuàng)建生成庫文件,也可以與庫文件一起經(jīng)L51 連接定位生成絕對(duì)目標(biāo)文件(.ABS)。ABS 文件由OH51 轉(zhuǎn)換成標(biāo)準(zhǔn)的Hex 文件,以供調(diào)試器dScope51 或tScope51 使用進(jìn)行源代碼級(jí)調(diào)試,也可由仿真器使用直接對(duì)目標(biāo)板進(jìn)行調(diào)試,也可以直接寫入程序存貯器如EPROM 中。圖(1) C51 工具包整體結(jié)構(gòu)圖第三節(jié) Keil C51 工具包的安裝81. C51 for Dos在 Windows 下直接運(yùn)行軟件包中DOS\C51DOS.exe 然后選擇安裝目錄即可。完畢后欲使系統(tǒng)正常工作須進(jìn)行以下操作(設(shè)C:\C51 為安裝目錄):修改 Autoexec.bat,加入path=C:\C51\BinSet C51LIB=C:\C51\LIBSet C51INC=C:\C51\INC然后運(yùn)行Autoexec.bat2. C51 for Windows 的安裝及注意事項(xiàng):在 Windows 下運(yùn)行軟件包中WIN\Setup.exe,最好選擇安裝目錄與C51 for Dos相同,這樣設(shè)置最簡(jiǎn)單(設(shè)安裝于C:\C51 目錄下)。然后將軟件包中crack 目錄中的文件拷入C:\C51\Bin 目錄下。第四節(jié) Keil C51 工具包各部分功能及使用簡(jiǎn)介1. C51 與A51(1) C51C51 是C 語言編譯器,其使用方法為:C51 sourcefile[編譯控制指令]或者 C51 @ commandfile其中 sourcefile 為C 源文件(.C)。大量的編譯控制指令完成C51 編譯器的全部功能。包控C51 輸出文件C.LST,.OBJ,.I 和.SRC 文件的控制。源文件(.C)的控制等,詳見第五部分的具體介紹。而 Commandfile 為一個(gè)連接控制文件其內(nèi)容包括:.C 源文件及各編譯控制指令,它沒有固定的名字,開發(fā)人員可根據(jù)自己的習(xí)慣指定,它適于用控制指令較多的場(chǎng)合。(2) A51A51 是匯編語言編譯器,使用方法為:9A51 sourcefile[編譯控制指令]或 A51 @ commandfile其中sourcefile 為匯編源文件(.asm或.a51),而編譯控制指令的使用與其它匯編如ASM語言類似,可參考其他匯編語言材料。Commandfile 同C51 中的Commandfile 類似,它使A51 使用和修改方便。2. L51 和BL51(1) L51L51 是Keil C51 軟件包提供的連接/定位器,其功能是將編譯生成的OBJ 文件與庫文件連接定位生成絕對(duì)目標(biāo)文件(.ABS),其使用方法為:L51 目標(biāo)文件列表[庫文件列表] [to outputfile] [連接控制指令]或 L51 @Commandfile源程序的多個(gè)模塊分別經(jīng) C51 與A51 編譯后生成多個(gè)OBJ 文件,連接時(shí),這些文件全列于目標(biāo)文件列表中,作為輸入文件,如果還需與庫文件(.LiB)相連接,則庫文件也必須列在其后。outputfile 為輸文件名,缺少時(shí)為第一模塊名,后綴為.ABS。連接控制指令提供了連接定位時(shí)的所有控制功能。Commandfile 為連接控制文件,其具體內(nèi)容是包括了目標(biāo)文件列表,庫文件列表及輸出文件、連接控制命令,以取代第一種繁瑣的格式,由于目標(biāo)模塊庫文件大多不止1 個(gè),因而第2 種方法較多見,這個(gè)文件名字也可由使用者隨意指定。(2) Bl51BL51 也是C51 軟件包的連接/定位器,其具有L51 的所有功能,此外它還具有以下3 點(diǎn)特別之處:a. 可以連接定位大于64kBytes 的程序。b. 具有代碼域及域切換功能(CodeBanking & Bank Switching)c. 可用于RTX51 操作系統(tǒng)RTX51 是一個(gè)實(shí)時(shí)多任務(wù)操作系統(tǒng),它改變了傳統(tǒng)的編程模式,甚至不必用main( )函數(shù),單片機(jī)系統(tǒng)軟件向RTOS 發(fā)展是一種趨勢(shì),這種趨勢(shì)對(duì)于186 和38610及68K 系列CPU 更為明顯和必須,對(duì)8051 因CPU 較為簡(jiǎn)單,程序結(jié)構(gòu)等都不太復(fù)雜,RTX51 作用顯得不太突出,其專業(yè)版軟件PK51 軟件包甚至不包括RTX51Full,而只有一個(gè)RTX51TINY 版本的RTOS。RTX51 TINY 適用于無外部RAM 的單片機(jī)系統(tǒng),因而可用面很窄,在本文中不作介紹。Bank switching 技術(shù)因使用很少也不作介紹。3. DScope51,Tscope51 及Monitor51(1) dScope51dScope51 是一個(gè)源級(jí)調(diào)試器和模擬器,它可以調(diào)試由C51 編譯器、A51 匯編器、PL/M-51 編譯器及ASM-51 匯編器產(chǎn)生的程序。它不需目標(biāo)板(for windows 也可通過mon51 接目標(biāo)板),只能進(jìn)行軟件模擬,但其功能強(qiáng)大,可模擬CPU 及其外圍器件,如內(nèi)部串口,外部I/O 及定時(shí)器等,能對(duì)嵌入式軟件功能進(jìn)行有效測(cè)試。

    標(biāo)簽: Keil C51 使用詳解

    上傳時(shí)間: 2013-11-01

    上傳用戶:zhouxuepeng1

  • FREESCALE單片機(jī)的C編程教程

     1.The C Programming Language is a powerful, flexible andpotentially portable high-level programming language. 2.The C language may be used successfully to create a programfor an 8-bit MCU, but to produce the most efficient machinecode, the programmer must carefully construct the C Languageprogram.3.The programmer must not only create an efficient high leveldesign, but also pay attention to the detailed implementation.

    標(biāo)簽: FREESCALE 單片機(jī) 編程 教程

    上傳時(shí)間: 2013-12-27

    上傳用戶:huanglang

  • AT89C2051驅(qū)動(dòng)步進(jìn)電機(jī)的電路和源碼

    AT89C2051驅(qū)動(dòng)步進(jìn)電機(jī)的電路和源碼:AT89C2051驅(qū)動(dòng)步進(jìn)電機(jī)的電路和源碼 程序:stepper.c stepper.hex/* * STEPPER.C * sweeping stepper's rotor cw and cww 400 steps * Copyright (c) 1999 by W.Sirichote */#i nclude c:\mc5151io.h /* include i/o header file */ #i nclude c:\mc5151reg.hregister unsigned char j,flag1,temp; register unsigned int cw_n,ccw_n;unsigned char step[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90} #define n 400/* flag1 mask byte 0x01 run cw() 0x02 run ccw() */main(){ flag1=0; serinit(9600); disable(); /* no need timer interrupt */ cw_n = n; /* initial step number for cw */ flag1 |=0x01; /* initial enable cw() */while(1){ { tick_wait(); /* wait for 10ms elapsed */energize(); /* round-robin execution the following tasks every 10ms */ cw(); ccw(); } }}cw(){ if((flag1&0x01)!=0) { cw_n--; /* decrement cw step number */ if (cw_n !=0) j++; /* if not zero increment index j */ else {flag1&=~0x01; /* disable cw() execution */ ccw_n = n; /* reload step number to ccw counter */ flag1 |=0x02; /* enable cww() execution */ } }

    標(biāo)簽: C2051 2051 89C AT

    上傳時(shí)間: 2013-11-21

    上傳用戶:boyaboy

  • PCA9541 2 to 1 I2C-bus master

    The PCA9541 is a 2-to-1 I2C-bus master selector designed for high reliability dual masterI2C-bus applications where system operation is required, even when one master fails orthe controller card is removed for maintenance. The two masters (for example, primaryand back-up) are located on separate I2C-buses that connect to the same downstreamI2C-bus slave devices. I2C-bus commands are sent by either I2C-bus master and are usedto select one master at a time. Either master at any time can gain control of the slavedevices if the other master is disabled or removed from the system. The failed master isisolated from the system and will not affect communication between the on-line masterand the slave devices on the downstream I2C-bus.

    標(biāo)簽: master C-bus 9541 PCA

    上傳時(shí)間: 2013-10-09

    上傳用戶:3294322651

  • PCA9544A 4channel I2C multiple

    The PCA9544A provides 4 interrupt inputs, one for each channeland one open drain interrupt output. When an interrupt is generated byany device, it will be detected by the PCA9544A and the interruptoutput will be driven LOW. The channel need not be active fordetection of the interrupt. A bit is also set in the control byte.Bits 4 – 7 of the control byte correspond to channels 0 – 3 of thePCA9544A, respectively. Therefore, if an interrupt is generated byany device connected to channel 2, the state of the interrupt inputs isloaded into the control register when a read is accomplished.Likewise, an interrupt on any device connected to channel 0 wouldcause bit 4 of the control register to be set on the read. The mastercan then address the PCA9544A and read the contents of thecontrol byte to determine which channel contains the devicegenerating the interrupt. The master can then reconfigure thePCA9544A to select this channel, and locate the device generatingthe interrupt and clear it. The interrupt clears when the deviceoriginating the interrupt clears.

    標(biāo)簽: 4channel multiple 9544A 9544

    上傳時(shí)間: 2014-12-28

    上傳用戶:潛水的三貢

  • Adding 32 KB of Serial SRAM to

    Although Stellaris microcontrollers have generous internal SRAM capabilities, certain applicationsmay have data storage requirements that exceed the 8 KB limit of the Stellaris LM3S8xx seriesdevices. Since microcontrollers do not have an external parallel data-bus, serial memory optionsmust be considered. Until recently, the ubiquitous serial EEPROM/flash device was the only serialmemory solution. The major limitations of EEPROM and flash technology are slow write speed, slowerase times, and limited write/erase endurance.Recently, serial SRAM devices have become available as a solution for high-speed dataapplications. The N256S08xxHDA series of devices, from AMI Semiconductor, offer 32 K x 8 bits oflow-power data storage, a fast Serial Peripheral Interface (SPI) serial bus, and unlimited write cycles.The parts are available in 8-pin SOIC and compact TSSOP packages.

    標(biāo)簽: Adding Serial SRAM 32

    上傳時(shí)間: 2013-10-14

    上傳用戶:cxl274287265

  • Emulating a synchronous serial

    The C500 microcontroller family usually provides only one on-chip synchronous serialchannel (SSC). If a second SSC is required, an emulation of the missing interface mayhelp to avoid an external hardware solution with additional electronic components.The solution presented in this paper and in the attached source files emulates the mostimportant SSC functions by using optimized SW routines with a performance up to 25KBaud in Slave Mode with half duplex transmission and an overhead less than 60% atSAB C513 with 12 MHz. Due to the implementation in C this performance is not the limitof the chip. A pure implementation in assembler will result in a strong reduction of theCPU load and therefore increase the maximum speed of the interface. In addition,microcontrollers like the SAB C505 will speed up the interface by a factor of two becauseof an optimized architecture compared with the SAB C513.Moreover, this solution lays stress on using as few on-chip hardware resources aspossible. A more excessive consumption of those resources will result in a highermaximum speed of the emulated interface.Due to the restricted performance of an 8 bit microcontroller a pin compatible solution isprovided only; the internal register based programming interface is replaced by a set ofsubroutine calls.The attached source files also contain a test shell, which demonstrates how to exchangeinformation between an on-chip HW-SSC and the emulated SW-SSC via 5 external wiresin different operation modes. It is based on the SAB C513 (Siemens 8 bit microcontroller).A table with load measurements is presented to give an indication for the fraction of CPUperformance required by software for emulating the SSC.

    標(biāo)簽: synchronous Emulating serial

    上傳時(shí)間: 2014-01-31

    上傳用戶:z1191176801

  • MPC106 PCI Bridge/Memory Contr

    In this document, the term Ô60xÕ is used to denote a 32-bit microprocessor from the PowerPC architecture family that conforms to the bus interface of the PowerPC 601ª, PowerPC 603ª, or PowerPC 604 microprocessors. Note that this does not include the PowerPC 602ª microprocessor which has a multiplexed address/data bus. 60x processors implement the PowerPC architecture as it is speciÞed for 32-bit addressing, which provides 32-bit effective (logical) addresses, integer data types of 8, 16, and 32 bits,and ßoating-point data types of 32 and 64 bits (single-precision and double-precision).1.1 Overview The MPC106 provides an integrated high-bandwidth, high-performance, TTL-compatible interface between a 60x processor, a secondary (L2) cache or additional (up to four total) 60x processors, the PCI bus,and main memory. This section provides a block diagram showing the major functional units of the 106 and describes brießy how those units interact.Figure 1 shows the major functional units within the 106. Note that this is a conceptual block diagram intended to show the basic features rather than an attempt to show how these features are physically implemented on the device.

    標(biāo)簽: Bridge Memory Contr MPC

    上傳時(shí)間: 2013-10-08

    上傳用戶:18711024007

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