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Memory Interfacing

Memory Interfacing. NAND (or any gate ) As decoder. ‘138 ( 3x8 decoder). ‘138 ( 3x8 decoder). ‘139 ( dual 2x4 decoder). ‘139 ( dual 2x4 decoder). Programmable Decoders. We can Use PLA,PAL,GAL,FPGA,… Example PAL16L8 10 input pins 2 output pins ( active low) 10 programmable pins.

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Memory Interfacing

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  1. Memory Interfacing

  2. NAND (or any gate ) As decoder

  3. ‘138 ( 3x8 decoder)

  4. ‘138 ( 3x8 decoder)

  5. ‘139 ( dual 2x4 decoder)

  6. ‘139 ( dual 2x4 decoder)

  7. Programmable Decoders • We can Use PLA,PAL,GAL,FPGA,… • Example PAL16L8 • 10 input pins • 2 output pins ( active low) • 10 programmable pins

  8. Two Banks of memory

  9. Two Banks of memory

  10. Two Banks of memory

  11. Two Banks of memory

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