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    • 參數(shù)資料
      型號: M38001E8-XXXSP
      廠商: Mitsubishi Electric Corporation
      元件分類: DC/DC變換器
      英文描述: 1 watt dc-dc converters
      中文描述: 1瓦的DC - DC轉(zhuǎn)換器
      文件頁數(shù): 44/173頁
      文件大?。?/td> 4203K
      代理商: M38001E8-XXXSP
      1-30
      HARDWARE
      3800 GROUP USER’S MANUAL
      Bus control with memory expansion
      The 3800 group has a built-in ONW function to facilitate access to
      external memory and I/O devices in memory expansion mode or
      microprocessor mode.
      If an “L” level signal is input to the ONW pin when the CPU is in a
      read or write state, the corresponding read or write cycle is ex-
      tended by one cycle of
      φ
      . During this extended period, the RD or
      WR signal remains at “L”. This extension period is valid only for
      writing to and reading from addresses 0000
      16
      to 0007
      16
      and
      0440
      16
      to FFFF
      16
      in microprocessor mode, 0040
      16
      to YYYY
      16
      in
      memory expansion mode, and only read and write cycles are ex-
      tended.
      Fig. 30 ONW function timing
      FUNCTIONAL DESCRIPTION
      φ
      Read cycle
      Write cycle
      Dummy cycle Write cycle
      Read cycle Dummy cycle
      AD
      15
      to AD
      0
      Period during which ONW input signal is received
      During this period, the ONW signal must be fixed at either “H” or “L”. At all other times, the input level of the ONW
      signal has no affect on operations.
      The bus cycles is not extended for an address in the area 0008
      16
      to 043F
      16,
      regardless of whether the ONW signal
      is received.
      8
      :
      8
      8
      8
      ONW
      WR
      RD
      相關PDF資料
      PDF描述
      M38001E8-XXXSS 1 watt dc-dc converters
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      相關代理商/技術參數(shù)
      參數(shù)描述
      M38001E8-XXXSS 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
      M38001M1-DXXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
      M38001M1-DXXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
      M38001M1-XXXFP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
      M38001M1-XXXFS 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER