The read fifo logic will enable the read fifo data each 1/N clock cycles. If you need to handle different input timing you can implement a simple input FIFO logic in order to buffer the incoming parallel data. I mean, if the parallel data is not yet totally serialized, no other input data can be processed. The error detection logic rises the “ o_error_serialize_pulse” if the input data enable is high during the serialization process.
In the VHDL code is implemented an error detection logic. Signal r_data : std_logic_vector(G_N-1 downto 0) O_error_serialize_pulse : out std_logic) I_data : in std_logic_vector(G_N-1 downto 0)
Figure 2 Parallel to Serial conversion exampleĪn example of Parallel to Serial converter
The serializer section takes N clock cycles to output the serial data stream. The parallel input to the module shall be at a rate of less than or equal to 1/N clock cycles. Let assume the parallel data bus of the Parallel to Serial converter to be N bit. Parallel to Serial converter VHDL code example If you need to transfer 16-bit data 1MHz the serial data stream speed shall be at least greater than 16 x 1 MHz = 16 MHz. Same data rate you need to use a higher speed in data transfer. Figure 1 FPGA connection Parallel vs SerialĬould be to serialize the parallel data using less connection. As you can see, these are a lot of wires! Moreover, a skew between the bits in the parallel data bus can affect the connection integrity. For instance, if we need to transfer a data bus of 16 bits between twoĭifferent FPGA at a rate of 1 MHz, we need to connect at leastġ6-bit data + 1 bit enable + 1 bit clock = 18 wires running 1 MHz. Please, try our service.From two different devices, the simple way is to use the minimum numbers of We provide original answers that are not plagiarized. Or send us an email to and we will reply instantly. If you need answers to this assignment, WhatsApp/Text to +1 6 Circuit and waveforms for transmitting an The 74395A 4-bit shift register with three-state outputs Z state can be treated as if this gate doesn’t exist in the Used to connect output of more than one register to the same HIGH, LOW or high-impedance state (Z) output states. VHDL simulation waveforms of a parallel-load shiftright register Use VHDL Structural Modeling To Describe the FollowingĤ-bit Shift Register Using Structure Modeling in VHDL This is also known as component instantiation. Use the PORT MAP keyword to describe how each COMPONENT & PORT MAP statements are used to The component must be pre-defined at the beginning of the Structural approach uses multiple components connected Waveforms from serial-to-parallel shift register
Strobe line used to enable-then-disable the clock to stop the 4-bit Serial-in, Parallel-out shift register 4-bit parallel-in, serial-out shift register using LaMeres, © Springer Nature Switzerlandīit shift register – Receives 4 bits of parallel da Some of the materials are adopted from Introduction to Logic Circuits & Logic Design with VHDL by Brock J. Some of the pictures are adopted from the internet and the textbook: Digital Electronics: A Practical Approach with VHDL (9th Edition) by Kleitz, William. The template of this power point is adapted from:
Xilinx Vivado 2020.1 software is required.