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    1. <td id="jcru4"><video id="jcru4"><acronym id="jcru4"></acronym></video></td>
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    2. 參數(shù)資料
      型號: M34501M2
      廠商: Mitsubishi Electric Corporation
      英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
      中文描述: 單芯片4位微機的CMOS
      文件頁數(shù): 108/113頁
      文件大?。?/td> 1252K
      代理商: M34501M2
      108
      4501 Group
      SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
      MITSUBISHI MICROCOMPUTERS
      Table 20 Product of built-in PROM version
      PROM size
      (
      10 bits)
      4096 words
      RAM size
      (
      4 bits)
      256 words
      M34501E4FP
      One Time PROM [shipped in blank]
      20P2N-A
      BUILT-IN PROM VERSION
      In addition to the mask ROM versions, the 4501 Group has the
      One Time PROM versions whose PROMs can only be written to
      and not be erased.
      The built-in PROM version has functions similar to those of the
      mask ROM versions, but it has PROM mode that enables writing to
      built-in PROM.
      Table 20 shows the product of built-in PROM version. Figure 52
      shows the pin configurations of built-in PROM versions.
      The One Time PROM version has pin-compatibility with the mask
      ROM version.
      (1) PROM mode
      The 4501 Group has a PROM mode in addition to a normal opera-
      tion mode. It has a function to serially input/output the command
      codes, addresses, and data required for operation (e.g., read and
      program) on the built-in PROM using only a few pins. This mode
      can be selected by setting pins SDA (serial data input/output),
      S
      CLK
      (serial clock input), PGM to
      H
      after connecting wires as
      shown in Figure 54 and powering on the V
      DD
      pin, and then apply-
      ing 12 V to the V
      PP
      pin.
      In the PROM mode, three types of software commands (read, pro-
      gram, and program verify) can be used. Clock-synchronous serial
      I/O is used, beginning from the LSB (LSB first).
      Use the special-perpose serial programmer when performing serial
      read/program.
      As for the serial programmer for the Mitsubishi single-chip micro-
      computer (serial programmer and control software), refer to the
      Mitsubishi Microcomputer Development Support Tools
      Hompage
      (http://www.tool-spt.mesc.co.jp/index_e.htm).
      Fig. 53 Flow of writing and test of the product shipped in blank
      ROM type
      Package
      Product
      W
      r
      i
      t
      i
      n
      g
      w
      i
      t
      h
      P
      R
      O
      M
      p
      r
      o
      g
      r
      a
      m
      m
      e
      r
      Screening (Leave at 150
      °
      C for 40 hours) (
      Note
      )
      Verify test with PROM programmer
      Function test in target device
      S
      t
      h
      m
      h
      i
      n
      a
      i
      c
      o
      c
      n
      r
      r
      e
      o
      s
      t
      o
      o
      h
      e
      r
      a
      m
      g
      p
      s
      e
      u
      c
      t
      r
      t
      e
      e
      r
      e
      m
      n
      p
      t
      o
      i
      n
      e
      g
      r
      1
      t
      u
      0
      e
      m
      r
      e
      p
      ,
      °
      C
      e
      n
      r
      e
      a
      v
      e
      t
      e
      x
      u
      r
      e
      e
      e
      i
      s
      p
      i
      o
      n
      h
      s
      g
      i
      e
      g
      h
      t
      1
      e
      h
      0
      r
      s
      c
      .
      t
      a
      5
      t
      r
      x
      d
      e
      0
      e
      c
      e
      u
      Note:
      (2) Notes on handling
      A high-voltage is used for writing. Take care that overvoltage is
      not applied. Take care especially at turning on the power.
      For the One Time PROM version shipped in blank, Mitsubishi
      Electric corp. does not perform PROM writing test and screening
      in the assembly process and following processes. In order to im-
      prove reliability after writing, performing writing and test
      according to the flow shown in Figure 53 before using is recom-
      mended (Products shipped in blank: PROM contents is not
      written in factory when shipped).
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