ENTITY shift4 IS PORT ( D : IN STDLOGICVECTOR (3 DOWNTO 0) Enable : IN STDLOGIC Sin : IN STDLOGIC Clock : IN STDLOGIC Q : OUT STDLOGICVECTOR (3 DOWNTO 0) ) END shift4 And I wrote this code. This code is given to me for shift register. There is also an R/t input that determines the direction of shift. I want to build a 4-bit shift register using D FlipFlop, but I don't understand this diagram. When it is 0 the shift register will perform a parallel load of the 16-bit data input called Din.
When SH/LD is 1, the shift register will shift. Library IEEE use IEEE.STD_LOGIC_1164.ALL use IEEE.STD_LOGIC_ARITH.ALL use IEEE.STD_LOGIC_UNSIGNED. Transcribed image text: Write the VHDL code for a 16-bit universal shift register. Thanks a lot for your help, here's the code: So far I've made this, but I'm not sure if it's ok (I've simulated it, but since I'm new to VHDL I'm not sure if it's working as it should). Contribute to charkost/4-Bit-Bidirectional-Shift-Register development by creating an account on GitHub. Above we apply four bit of data to a parallel-in/ parallel-out shift register at DA DB DC DD. A universal shift register is a do-everything device in addition to the parallel-in/ parallel-out function. VHDL code for a 74LS194 Universal Shift Register Hi everyone! I've got an assignment about writing the VHDL code for a 74LS194 shift register, but I'm not allowed to use the functional description. Functions: -Parallel-to-Serial, Serial-to-Parallel Conversions. The purpose of the parallel-in/ parallel-out shift register is to take in parallel data, shift it, then output it as shown below.
