the measuring and filtering apparatuses have the same cpu board including the network port, serial port, external ram and flash . an additional cpld is added for further function expansion 檢測儀和分選儀的cpu板采用相同的設(shè)計,板內(nèi)的可用資源有網(wǎng)口,串口,外部ram,外部flash等等。
these other boards can ben cpu boards or peripheral boards providing various functions . the vmebus standard originated with the motorola versabus in 1979 which was designed using the then new mc68000 microprocessor 系統(tǒng)總線吞吐率的優(yōu)化:其他的芯片組對pci到內(nèi)存帶寬只能到70mbs,powerplusii則能達(dá)到80mbs而無須消耗額外的cpu資源。
vmebus boards have data bus sizes of 16, 32, or 64 bits and are designed to be plugged into a backplane that has up to 21 slots for other boards . these other boards can ben cpu boards or peripheral boards providing various functions vme計算機具有如下性能特點:1,支持多個cpu,2,64位的尋址和數(shù)據(jù)傳輸能力,3,iec297歐卡標(biāo)準(zhǔn),機械性能可靠和穩(wěn)定,并具有可靠的接插件。
the main control board ( central process unit board, cpu board ) of measurement and control system is designed, and high accuracy programmable dual voltage source board ( dvs board ) is designed . improving suggestions of the cpu board are brought forward 設(shè)計了檢測與控制系統(tǒng)主控制板(cpu板)和高精度可編程雙電壓源板(dvs板),并提出對現(xiàn)在主控制板設(shè)計的升級方案建議。
the main control board ( central process unit board, cpu board ) of measurement and control system is designed, and high accuracy programmable dual voltage source board ( dvs board ) is designed . improving suggestions of the cpu board are brought forward 設(shè)計了檢測與控制系統(tǒng)主控制板(cpu板)和高精度可編程雙電壓源板(dvs板),并提出對現(xiàn)在主控制板設(shè)計的升級方案建議。