maksyuki
3b6a925a51
- Created documentation for , , , and modules, detailing their functionality, parameters, and usage examples. - Implemented a script to ensure required headings and content are present in documentation files. - Developed to generate and update documentation pages from SystemVerilog declarations, ensuring consistency and completeness.
2.8 KiB
latest_value_stream
| Property | Value |
|---|---|
| Kind | module |
| RTL source | rtl/stream/stream_advanced.sv |
| Availability | Synthesizable RTL |
Summary
Valid-only stream adapter retaining the newest pending value.
Functional Behavior
Valid-only stream adapter retaining the newest pending value. It follows the repository valid/ready rule: a payload transfers only when both signals are high in the same cycle, and a stalled valid payload remains stable.
Suitable Applications
Use for elastic pipelines, stream routing, arbitration, backpressure, and response handling.
Parameters
The declaration below is canonical; retain the RTL-enforced parameter range.
| Parameter | Declaration |
|---|---|
DATA_WIDTH |
parameter int DATA_WIDTH = 32 |
Interface Definition
module latest_value_stream #(
parameter int DATA_WIDTH = 32
) (
input logic clk_i,
input logic rst_n_i,
input logic clear_i,
input logic in_valid_i,
input logic [DATA_WIDTH-1:0] in_data_i,
output logic out_valid_o,
input logic out_ready_i,
output logic [DATA_WIDTH-1:0] out_data_o,
output logic busy_o
);
Port Summary
| Signal | Direction | Declaration |
|---|---|---|
clk_i |
input |
input logic clk_i |
rst_n_i |
input |
input logic rst_n_i |
clear_i |
input |
input logic clear_i |
in_valid_i |
input |
input logic in_valid_i |
in_data_i |
input |
input logic [DATA_WIDTH-1:0] in_data_i |
out_valid_o |
output |
output logic out_valid_o |
out_ready_i |
input |
input logic out_ready_i |
out_data_o |
output |
output logic [DATA_WIDTH-1:0] out_data_o |
busy_o |
output |
output logic busy_o |
Integration and Use
Observe vector sizing, selection encoding, and flush semantics in the declaration. Do not modify a valid payload while its corresponding ready is low.
latest_value_stream #(
.DATA_WIDTH(DATA_WIDTH)
) u_latest_value_stream (
.clk_i(clk_i),
.rst_n_i(rst_n_i),
.clear_i(clear_i),
.in_valid_i(in_valid_i),
.in_data_i(in_data_i),
.out_valid_o(out_valid_o),
.out_ready_i(out_ready_i),
.out_data_o(out_data_o),
.busy_o(busy_o)
);
Dependencies and Verification
The linked RTL source is the implementation authority and contains local assertions for unsupported
parameter combinations. See docs/design.md for repository-wide CDC, reset,
stream, and storage contracts, and docs/verification.md for the
verification matrix.