Entity: JesdLmfcGen
- File: JesdLmfcGen.vhd
Diagram
Description
Company : SLAC National Accelerator Laboratory
Description: LMFC Generator Local Multi Frame Clock Generator Periodically outputs one clock cycle pulse (LMFC). Synchronizes with the rising edge of sysref_i if sync is requested by any of the on-board JESD receivers. Outputs first pulse 2 c-c after sysref_i='1' Period determined by F_G*K_G/GT_WORD_SIZE_C.
(Example: 2*32/4 = 16)
This file is part of 'SLAC Firmware Standard Library'. It is subject to the license terms in the LICENSE.txt file found in the top-level directory of this distribution and at: https://confluence.slac.stanford.edu/display/ppareg/LICENSE.html. No part of 'SLAC Firmware Standard Library', including this file, may be copied, modified, propagated, or distributed except according to
the terms contained in the LICENSE.txt file.
Generics
| Generic name | Type | Value | Description |
|---|---|---|---|
| TPD_G | time | 1 ns | |
| K_G | positive | 32 | |
| F_G | positive | 2 |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| clk | in | sl | |
| rst | in | sl | |
| nSync_i | in | sl | Synchronization inputs |
| sysref_i | in | sl | |
| sysrefRe_o | out | sl | Outs |
| lmfc_o | out | sl |
Signals
| Name | Type | Description |
|---|---|---|
| r | RegType | |
| rin | RegType |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| PERIOD_C | positive | ((K_G * F_G)/GT_WORD_SIZE_C)-1 | |
| CNT_WIDTH_C | positive | bitSize(PERIOD_C) | |
| REG_INIT_C | RegType | ( sysrefD1 => '0', cnt => (others => '0'), lmfc => '0', sysrefRe => '0' ) |
Types
| Name | Type | Description |
|---|---|---|
| RegType |
Processes
- comb: ( r, rst,sysref_i,nSync_i )
- seq: ( clk )