First-in, First-out (FIFO) Memory Buffer with Built-in Self Test (BIST)

Specifications

• Write speed: 400 MHz
• Read speed: 40 MHz
• Depth: 10 words
• Flags:
  • Empty: set when the synchronized write pointer is equal to read pointer
  • Full: set when write pointer's MSB is not equal to synchronized read pointer's MSB, while the rest of the bits must be equal.

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Features

• Utilizes 5-bit Johnson counters for clock domain crossing.
• BIST features a walking ones pattern generator, controller, ROM, and comparator.

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Operating Modes

• If BIST = 1, ring counter outputs are compared to ROM values to ensure no lines are shorted together
• If BIST = 0, FIFO is in normal operation