Entity: FifoRdFsm

Diagram

time TPD_G sl RST_POLARITY_G boolean RST_ASYNC_G boolean FIFO_ASYNC_G string MEMORY_TYPE_G boolean FWFT_EN_G positive DATA_WIDTH_G positive ADDR_WIDTH_G positive EMPTY_THRES_G sl rst sl wrRdy slv(ADDR_WIDTH_G-1 downto 0) wrIndex slv(DATA_WIDTH_G-1 downto 0) doutb sl rd_clk sl rd_en sl rdRdy slv(ADDR_WIDTH_G-1 downto 0) rdIndex slv(ADDR_WIDTH_G-1 downto 0) addrb sl enb sl regceb slv(DATA_WIDTH_G-1 downto 0) dout slv(ADDR_WIDTH_G-1 downto 0) rd_data_count sl valid sl underflow sl prog_empty sl almost_empty sl empty

Description

Company : SLAC National Accelerator Laboratory

Description: FIFO Read FSM

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
RST_POLARITY_G sl '1' '1' for active high rst, '0' for active low
RST_ASYNC_G boolean false
FIFO_ASYNC_G boolean false
MEMORY_TYPE_G string "block"
FWFT_EN_G boolean false
DATA_WIDTH_G positive 16
ADDR_WIDTH_G positive 4
EMPTY_THRES_G positive 1

Ports

Port name Direction Type Description
rst in sl Reset
rdRdy out sl RD/WR FSM Interface
rdIndex out slv(ADDR_WIDTH_G-1 downto 0)
wrRdy in sl
wrIndex in slv(ADDR_WIDTH_G-1 downto 0)
addrb out slv(ADDR_WIDTH_G-1 downto 0) RAM Interface
doutb in slv(DATA_WIDTH_G-1 downto 0)
enb out sl
regceb out sl
rd_clk in sl FIFO Read Interface
rd_en in sl
dout out slv(DATA_WIDTH_G-1 downto 0)
rd_data_count out slv(ADDR_WIDTH_G-1 downto 0)
valid out sl
underflow out sl
prog_empty out sl
almost_empty out sl
empty out sl

Signals

Name Type Description
r RegType
rin RegType

Constants

Name Type Value Description
MAX_CNT_C slv(ADDR_WIDTH_G-1 downto 0) (others => '1')
REG_INIT_C RegType ( rdRdy => ite(FIFO_ASYNC_G,
'0',
'1'),
tValid => (others => '0'),
enb => ite(FWFT_EN_G,
'0',
'1'),
regceb => ite(FWFT_EN_G,
'0',
'1'),
valid => '0',
underflow => '0',
prog_empty => '1',
almost_empty => '1',
empty => '1',
count => (others => '0'),
rdAddr => (others => '0'),
rdIndex => (others => '0'))

Types

Name Type Description
RegType

Processes