OpenCores
URL https://opencores.org/ocsvn/srdydrdy_lib/srdydrdy_lib/trunk

Subversion Repositories srdydrdy_lib

[/] [srdydrdy_lib/] [trunk/] [doc/] [component_descriptions.txt] - Diff between revs 19 and 21

Go to most recent revision | Show entire file | Details | Blame | View Log

Rev 19 Rev 21
Line 88... Line 88...
outputs.
outputs.
 
 
Note that sd_mirror is low-throughput, as it waits until all downstream blocks have
Note that sd_mirror is low-throughput, as it waits until all downstream blocks have
acknoweldged before accepting another word.
acknoweldged before accepting another word.
 
 
3.2 sd_rrslow
3.2 sd_rrmux
 
 
This block implements a "slow" round-robin arbiter/mux.  It has multiple modes
This block implements a round-robin arbiter/mux.  It has multiple modes
with options on whether a grant implies that input will "hold" the grant, or
with options on whether a grant implies that input will "hold" the grant, or
whether it moves on.
whether it moves on.
 
 
Mode 0 multiplexes between single words of data.  Mode 1 allows an interface to burst,
Mode 0 multiplexes between single words of data.  Mode 1 allows an interface to burst,
so once the interface begins transmitting it can transmit until it deasserts srdy.
so once the interface begins transmitting it can transmit until it deasserts srdy.
 
 
Mode 2 is for multiplexing packets, or other data where multiple words need to be
Mode 2 is for multiplexing packets, or other data where multiple words need to be
kept together.  Once srdy is asserted, the block will not switch inputs until the
kept together.  Once srdy is asserted, the block will not switch inputs until the
end pattern is seen, even if srdy is deasserted.
end pattern is seen, even if srdy is deasserted.
 
 
 
Also has a slow (1 cycle per input) and fast (immediate) arb mode.
 
 
Validation note:  modes 1 and 2 have not been verified to date.
Validation note:  modes 1 and 2 have not been verified to date.
 
 
4.0 Utility
4.0 Utility
 
 
This is intended for blocks which do not fit into one of the above categories.
This is intended for blocks which do not fit into one of the above categories.

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.