Entity: SynchronizerOneShotCntVector

File: SynchronizerOneShotCntVector.vhd

Diagram

Description

Company : SLAC National Accelerator Laboratory

Description: Wrapper for multiple SynchronizerOneShotCnt modules

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	Simulation FF output delay
RST_POLARITY_G	sl	'1'	'1' for active HIGH reset, '0' for active LOW reset
RST_ASYNC_G	boolean	false	true if reset is asynchronous, false if reset is synchronous
COMMON_CLK_G	boolean	false	True if wrClk and rdClk are the same clock
IN_POLARITY_G	slv	"1"	0 for active LOW, 1 for active HIGH (dataIn port)
OUT_POLARITY_G	slv	"1"	0 for active LOW, 1 for active HIGH (dataOut port)
USE_DSP_G	string	"no"	"no" for no DSP implementation, "yes" to use DSP slices
SYNTH_CNT_G	slv	"1"	Set to 1 for synthesising counter RTL, '0' to not synthesis the counter
CNT_RST_EDGE_G	boolean	true	true if counter reset should be edge detected, else level detected
CNT_WIDTH_G	positive	16
WIDTH_G	positive	16

Ports

Port name	Direction	Type	Description
wrClk	in	sl	Write Ports (wrClk domain)
wrRst	in	sl
dataIn	in	slv(WIDTH_G-1 downto 0)	Data to be 'synced'
rdClk	in	sl	clock to be SYNC'd to
rdRst	in	sl
rollOverEn	in	slv(WIDTH_G-1 downto 0)	'1' allows roll over of the counter
cntRst	in	sl	Optional counter reset
dataOut	out	slv(WIDTH_G-1 downto 0)	Synced data
cntOut	out	SlVectorArray(WIDTH_G-1 downto 0, CNT_WIDTH_G-1 downto 0)

Signals

Name	Type	Description
cntWrDomain	MySlvArray
cntRdDomain	MySlvArray
r	RegType
rin	RegType
cntRstSync	sl
rollOverEnSync	slv(WIDTH_G-1 downto 0)
wrEn	sl
tReady	sl
almostFull	sl
rdValid	sl
rdData	slv(FIFO_WIDTH_C-1 downto 0)

Constants

Name	Type	Value
IN_POLARITY_C	slv(WIDTH_G-1 downto 0)	fillVectorArray(IN_POLARITY_G)
OUT_POLARITY_C	slv(WIDTH_G-1 downto 0)	fillVectorArray(OUT_POLARITY_G)
SYNTH_CNT_C	slv(WIDTH_G-1 downto 0)	fillVectorArray(SYNTH_CNT_G)
FIFO_WIDTH_C	positive	CNT_WIDTH_G + bitSize(WIDTH_G-1)
REG_INIT_C	RegType	( tValid => '0', tData => (others => '0'), index => 0)

Types

Name	Type	Description
MySlvArray
RegType

Functions

fillVectorArray (INPUT : slv) return slv