Crossword puzzle on DSD

123456
Across
  1. 5. I can add three bits at a time
  2. 6. I am universal gate
Down
  1. 1. This algebra is used in digital
  2. 2. In me AND gates and OR gates are programmable. I am programmable IC
  3. 3. I am Hardware description language
  4. 4. I am a binary code. I am unit distance code