Configuration context switcher with a latch

摘要

Some embodiments provide an IC with configuration context switchers. The IC includes several configurable circuits, each of which configurably performs one of several operations at any given time, based on the configuration data set that it receives at that time. The IC includes several storage circuits for storing several configuration data sets for each of the configurable circuits. The IC also includes a context switching interconnect circuit for switchably connecting the configurable circuit to different sets of storage circuits to receive different sets of configuration data sets. The context switcher includes one or more stages for re-timing the data coming from the configuration storage elements. The stages can include interconnect circuitry or storage circuitry. Some embodiments build one of the stages in the configuration data storage elements. Some embodiments encode the configuration data bits and hence utilize a decoder in the context switcher to decode the encoded configuration data.

主权项

1. An integrated circuit (IC) comprising:
a plurality of storage circuits for storing a plurality of configuration data sets; an interconnect circuit for retrieving different sets of configuration data from the plurality of storage circuits, wherein the retrieved configuration data set comprises a bit for toggling a current state of the interconnect circuit, wherein the interconnect circuit switches to a logic state that is opposite to the current state when the bit for toggling the current state is at a first logic level, wherein the interconnect circuit maintains the current state when the bit for toggling the current state is at a second logic level that is opposite of the first logic level; and a configurable circuit for configurably performing one of a plurality of operations based on the current state of the interconnect circuit.