Today

• Memory/PLA/Adder
• Sequential Circuits
• Latches/Flip-Flops

Memory

• ROM (read-only)
• RAM (random access) → RWM
  • Needs power
  • Static (latch)
  • Dynamic (capacitor)
• Flash → stores charges
• Hard disk → magnetic

Examples

6-bit decoder, all 64 output bits on tri-state buffer

Could have all $m$ bit output.

8-bit address, 6 to decoder, 2 to mux

Each 256 has 16 bits has tri-state, each from decoder has 4 (since mux has 4 inputs)

Programmable Logic Arrays

• Similar to memory (Lookup Table)
• Usually hard coded
• Gives all literals (and their NOTs)
• A bunch of ANDs