Entity: rstmgr_por
- File: rstmgr_por.sv
Diagram
Description
Copyright lowRISC contributors. Licensed under the Apache License, Version 2.0, see LICENSE for details. SPDX-License-Identifier: Apache-2.0
This module stretches the POR
Generics
| Generic name | Type | Value | Description |
|---|---|---|---|
| FilterStages | int | 3 | |
| StretchCount | int | 32 |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| clk_i | input | ||
| rst_ni | input | ||
| scan_rst_ni | input | ||
| scanmode_i | input | ||
| rst_no | output |
Signals
| Name | Type | Description |
|---|---|---|
| rst_root_n_pre_mux | logic | |
| rst_root_n | logic | |
| rst_filter_n | logic [FilterStages-1:0] | |
| rst_stable | logic | |
| rst_clean_n | logic | |
| cnt | logic [CtrWidth-1:0] | |
| cnt_en | logic | |
| rst_nd | logic | stretch the POR |
| rst_nq | logic | stretch the POR |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| CtrWidth | int | $clog2(StretchCount+1) |
Processes
- unnamed: ( @(posedge clk_i or negedge rst_root_n) )
Type: always_ff
Description
filter the POR
- unnamed: ( @(posedge clk_i or negedge rst_clean_n) )
Type: always_ff
Instantiations
- rst_sync: prim_flop_2sync
Description
sync the POR
- u_rst_root_mux: prim_clock_mux2
- u_rst_clean_mux: prim_clock_mux2
Description
The stable is a vote of all filter stages.
Only when all the stages agree is the reset considered stable and count allowed.
- u_rst_flop: prim_flop
- u_rst_out_mux: prim_clock_mux2