<rt id="dk5rd"><delect id="dk5rd"><noframes id="dk5rd">
    • <button id="dk5rd"><input id="dk5rd"></input></button>
      <var id="dk5rd"><thead id="dk5rd"><sub id="dk5rd"></sub></thead></var>
      參數(shù)資料
      型號: PSD4235F1-A-12B81I
      廠商: 意法半導(dǎo)體
      英文描述: Flash In-System-Programmable Peripherals for 16-Bit MCUs
      中文描述: Flash在系統(tǒng)可編程外設(shè)的16位微控制器
      文件頁數(shù): 18/93頁
      文件大小: 503K
      代理商: PSD4235F1-A-12B81I
      Preliminary Information
      PSD4000 Series
      15
      9.0
      The
      PSD4000
      Functional
      Blocks
      As shown in Figure 1, the PSD4000 consists of six major types of functional blocks:
      J
      Memory Blocks
      J
      PLD Blocks
      J
      Bus Interface
      J
      I/OPorts
      J
      Power Management Unit
      J
      JTAG-ISP Interface
      The functions of each block are described in the following sections. Many of the blocks
      perform multiple functions, and are user configurable.
      9.1 Memory Blocks
      The PSD4000 has the following memory blocks:
      The main Flash memory
      Secondary Flash memory
      SRAM.
      The memory select signals for these blocks originate from the Decode PLD (DPLD) and
      are user-defined in PSDsoft.
      Table 7 summarizes which versions of the PSD4000 contain which memory blocks.
      Main Flash
      Secondary Flash
      Block Size
      Device
      Flash Size
      Sector Size
      Sector Size
      SRAM
      PSD4135G2
      512KB
      64KB
      32KB
      8KB
      8KB
      Table 7. Memory Blocks
      9.1.1 Main Flash and Secondary Flash Memory Description
      The main Flash memory block is divided evenly into eight sectors. The secondary Flash
      memory is divided into four sectors of eight Kbytes each. Each sector of either memory
      can be separately protected from program and erase operations.
      Flash memory may be erased on a sector-by-sector basis and programmed word-by-word.
      Flash sector erasure may be suspended while data is read from other sectors of memory
      and then resumed after reading.
      During a program or erase of Flash, the status can be output on the Rdy/Bsy pin of Port
      PE4. This pin is set up using PSDsoft.
      9.1.1.1 Memory Block Selects
      The decode PLD in the PSD4000 generates the chip selects for all the internal memory
      blocks (refer to the PLD section). Each of the eight Flash memory sectors have a
      Flash Select signal (FS0-FS7) which can contain up to three product terms. Each of the
      four Secondary Flash memory sectors have a Select signal (CSBOOT0-3) which can
      contain up to three product terms. Having three product terms for each sector select signal
      allows a given sector to be mapped in different areas of system memory. When using a
      microcontroller (80C51XA) with separate Program and Data space, these flexible select
      signals allow dynamic re-mapping of sectors from one space to the other before and after
      IAP.
      9.1.1.2 The Ready/Busy Pin (PE4)
      Pin PE4 can be used to output the Ready/Busy status of the PSD4000. The output on the
      pin will be a ‘0’ (Busy) when Flash memory blocks are being written to,
      or
      when the Flash
      memory block is being erased. The output will be a ‘1’ (Ready) when no write or erase
      operation is in progress.
      相關(guān)PDF資料
      PDF描述
      PSD4235G1-A-12B81I Flash In-System-Programmable Peripherals for 16-Bit MCUs
      PSD4135F1-A-12J Flash In-System-Programmable Peripherals for 16-Bit MCUs
      PSD4135G1-A-12J Flash In-System-Programmable Peripherals for 16-Bit MCUs
      PSD4235F1-A-12J MULTI STRIP
      PSD4235G1-A-12J UNIVERSAL STRIPPING TOOL W/ UTP CARTRIDGE
      相關(guān)代理商/技術(shù)參數(shù)
      參數(shù)描述
      PSD4235G2-70U 功能描述:SPLD - 簡單可編程邏輯器件 5.0V 4M 70ns RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池數(shù)量:10 最大工作頻率:66 MHz 延遲時間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24
      PSD4235G2-90U 功能描述:CPLD - 復(fù)雜可編程邏輯器件 5.0V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
      PSD4235G2-90UI 功能描述:CPLD - 復(fù)雜可編程邏輯器件 5.0V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
      PSD4235G2V-12UI 功能描述:CPLD - 復(fù)雜可編程邏輯器件 3.3V 4M 120ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
      PSD4235G2V-90U 功能描述:CPLD - 復(fù)雜可編程邏輯器件 3.3V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100