Entity: Arbiter

Diagram

time TPD_G sl RST_POLARITY_G boolean RST_ASYNC_G positive REQ_SIZE_G sl clk sl rst slv(REQ_SIZE_G-1 downto 0) req slv(bitSize(REQ_SIZE_G-1)-1 downto 0) selected sl valid slv(REQ_SIZE_G-1 downto 0) ack

Description

Company : SLAC National Accelerator Laboratory

Description: Example Arbiter Module

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 Reset is asynchronous
REQ_SIZE_G positive 16

Ports

Port name Direction Type Description
clk in sl
rst in sl Optional reset
req in slv(REQ_SIZE_G-1 downto 0)
selected out slv(bitSize(REQ_SIZE_G-1)-1 downto 0)
valid out sl
ack out slv(REQ_SIZE_G-1 downto 0)

Signals

Name Type Description
r RegType
rin RegType

Constants

Name Type Value Description
SELECTED_SIZE_C integer bitSize(REQ_SIZE_G-1)
REG_RESET_C RegType (lastSelected => (others => '0'),
valid => '0',
ack => (others => '0'))

Types

Name Type Description
RegType

Processes