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Altera_Forum
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13 years ago

PISO (4 bit parallel in serial out shift reigster)

Hello, I'm trying to create a simple 4-bit parallel in and serial out shift register. So far, here is what I have: --- Quote Start --- LIBRARY ieee; USE ieee.std_logic_1164.all; ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

--- Quote Start ---

but you shift statement is from msb to lsb i.e. bit3 starts as zero then bit2 then bit1 then bit0. So bit 3 will always be zero

--- Quote End ---

you also need to load qlatch with input first at load then start the shift. You are just assigning input 3 bits to qlatch