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XPS InSystem Flash

Product Description

The In System Flash (ISF) is type of serial flash memory and it is present only on the Spartan™-3AN devices. The Spartan™-3AN FPGA family is the sub-family of Spartan™-3A FPGA devices. The XPS InSystem Flash IP Core is 32-bit slave peripheral that connects to PLBv46 (Processor Local Bus with Xilinx simplifications) and provides access to the ISF using Serial Peripheral Interface (SPI) protocol.

Key Features and Benefits

  • Connects as a 32-bit slave on PLB V4.6 buses of 32, 64 or 128 bits
  • Supports four signal SPI interface (MOSI, MISO, SCK and SS)
  • Supports full-duplex operation
  • Supports programable clock phase and polarity
  • Supports manual slave select mode only
  • Supports transfer length of 8-bits only
  • Supports local loopback capability for internal testing of the core
  • Supports single SPI master and single ISF slave environment
  • Optional 16 element deep (an element is a byte) transmit and receive FIFOs


Device Family:

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