參數(shù)資料
      型號: XC3042L-8VQ100I
      廠商: Xilinx Inc
      文件頁數(shù): 20/76頁
      文件大?。?/td> 0K
      描述: IC FPGA 3.3V I-TEMP 100-VQFP
      產(chǎn)品變化通告: XC3000(L) Discontinuation 01/Feb/2003
      標準包裝: 90
      系列: XC3000A/L
      LAB/CLB數(shù): 144
      RAM 位總計: 30784
      輸入/輸出數(shù): 82
      門數(shù): 3000
      電源電壓: 3 V ~ 3.6 V
      安裝類型: 表面貼裝
      工作溫度: -40°C ~ 100°C
      封裝/外殼: 100-TQFP
      供應商設備封裝: 100-VQFP(14x14)
      R
      November 9, 1998 (Version 3.1)
      7-29
      XC3000 Series Field Programmable Gate Arrays
      7
      Peripheral Mode
      Peripheral mode uses the trailing edge of the logic AND
      condition of the CS0, CS1, CS2, and WS inputs to accept
      byte-wide data from a microprocessor bus. In the lead
      FPGA, this data is loaded into a double-buffered UART-like
      parallel-to-serial converter and is serially shifted into the
      internal logic. The lead FPGA presents the preamble data
      (and all data that overflows the lead device) on the DOUT
      pin.
      The Ready/Busy output from the lead device acts as a
      handshake signal to the microprocessor. RDY/BUSY goes
      Low when a byte has been received, and goes High again
      when the byte-wide input buffer has transferred its informa-
      tion into the shift register, and the buffer is ready to receive
      new data. The length of the BUSY signal depends on the
      activity in the UART. If the shift register had been empty
      when the new byte was received, the BUSY signal lasts for
      only two CCLK periods. If the shift register was still full
      when the new byte was received, the BUSY signal can be
      as long as nine CCLK periods.
      Note that after the last byte has been entered, only seven
      of its bits are shifted out. CCLK remains High with DOUT
      equal to bit 6 (the next-to-last bit) of the last byte entered.
      X5991
      ADDRESS
      BUS
      DATA
      BUS
      D0–7
      ADDRESS
      DECODE
      LOGIC
      CS0
      ...
      RDY/BUSY
      WS
      RESET
      ...
      OTHER
      I/O PINS
      D0–7
      CCLK
      DOUT
      M2
      HDC
      LDC
      FPGA
      GENERAL-
      PURPOSE
      USER I/O
      PINS
      D/P
      M0
      M1 PWR
      DWN
      +5 V
      CS2
      CS1
      CONTROL
      SIGNALS
      8
      INIT
      REPROGRAM
      +5 V
      5 k
      *
      IF READBACK IS
      ACTIVATED, A
      5-k
      RESISTOR IS
      REQUIRED IN SERIES
      WITH M1
      *
      OPTIONAL
      DAISY-CHAINED
      FPGAs WITH DIFFERENT
      CONFIGURATIONS
      OC
      Figure 27: Peripheral Mode Circuit Diagram
      Product Obsolete or Under Obsolescence
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