摘要:
Approaches for partially reconfiguring a frame are disclosed. In one approach, a circuit arrangement includes programmable resources, frames of configuration memory cells, and partial configuration control memory cells. Each frame includes a plurality of subsets of configuration memory cells, and each subset configures one of the programmable resources. Each partial configuration control memory cell is coupled to a respective one of the subsets. Responsive to a first partial bitstream that includes a quantity of configuration data for all the subsets of configuration cells of a first frame of the plurality of frames, each subset of the configuration memory cells of the first frame is configurable or not configurable responsive to the state of the associated partial configuration control memory cell.
摘要:
In a programmable device employing antifuses, first digital logic transistors the gates of which will experience a programming voltage Vpp have a greater gate insulator thickness than do second digital logic transistors the gates of which will not experience the programming voltage. The first digital logic transistors may be logic module input device transistors. The first digital logic transistors may be transistors coupled to an enable input lead where the enable input lead is couplable to a tie-high conductor or to a tie-low conductor depending on which of two antifuses is programmed.
摘要:
A programmable integrated circuit (see FIG. 18) includes a plurality of interface cells with programmable antifuses disposed on a branch of a routing conductor. The routing conductor extends in a first direction and is coupled to one terminal of a programming transistor. The other terminal of the programming transistor is coupled to a programming driver via a programming conductor that extends in the first direction. The branch of the routing conductor crosses a plurality of routing wire segments of one of the interface cells, where programmable antifuses are disposed to couple the branch of the routing conductor to one or more of the routing wire segments. The routing wire segments extend parallel to one another in the first direction and are each coupled to a first terminal of separate programming transistors. The second terminals of the programming transistors are coupled to programming drivers via programming conductors that extend in a second direction, which is perpendicular to the first direction. Thus, the programming drivers for the routing wire segments and the routing conductor are positioned in different locations. Accordingly, when an antifuse is programming to couple the branch of the routing conductor with one of the routing wire segments, the two programming drivers are controlled by two different programming control shift registers.
摘要:
A configurable interface for an integrated circuit is described. The integrated circuit includes a first core, where the first core is an application specific circuit version of a Peripheral Component Interconnect Express (“PCIe”) interface device. First configuration memory cells are associated with the first core, and the first configuration memory cells are for configuring the first core. The first configuration memory cells are programmable responsive to a first portion of a configuration bitstream, and the configuration bitstream is capable of including user-logic information for programming programmable logic of the integrated circuit.
摘要:
A field programmable gate array has columns of logic modules. A programming conductor used to conduct programming current to program antifuses of the field programmable gate array extends between two adjacent columns of logic modules. First wire segments extend from the programming conductor and toward the logic modules of a first of the two adjacent columns. Second wire segments extend the opposite direction from the programming conductor and toward logic modules of the second of the two adjacent columns. Programming current used to program antifuses disposed along the first wire segments as well as antifuses disposed along the second wire segments can be supplied from the same programming conductor that extends between the two columns of logic modules. The logic modules of the first column are mirrored versions of the logic modules of the second column.
摘要:
An interface cell for a programmable integrated circuit includes a pad, an input buffer, a first routing conductor, a plurality of second routing conductors, and a plurality of antifuses. The input of the input buffer is coupled to the pad and the output of the input buffer is coupled to the first routing conductor so that an input signal from the pad can be supplied onto the first routing conductor without passing through any programmed antifuses. The second routing conductors extend parallel to one another in a direction perpendicular to the direction in which the first routing conductor extends. The second routing conductors cross the first routing conductor and then pass out of the interface cell and into a routing channel of the programmable integrated circuit. One of the antifuses is disposed at each location where one of the second routing conductors crosses the first routing conductor. Accordingly, an input signal from the pad can be supplied onto any desired one of the second routing conductors of the routing channel by programming only one antifuse. The interface cell contains an enablable register, the control inputs of which can be independently driven from any conductor in the adjacent routing channel. Combinatorial and registered outputs of the interface cell can be simultaneously routed to the routing channel and some interface cell outputs have 2.times. drive strength.
摘要:
To facilitate the simultaneous programming of multiple antifuses on an integrated circuit, a first current path is established from a first programming terminal (VPP1) of a programmable logic device through a first antifuse to be programmed and a second current path is established from a second programming terminal (VPP2) of the programmable logic device through a second antifuse to be programmed. By supplying the programming current for programming the first antifuse from a different terminal than the programming current for programming the second antifuse, the two antifuses can be programmed simultaneously with an adequate amount of programming current being supplied to each antifuse. A programming current multiplexer circuit is disclosed for selectively coupling either a first programming voltage (VPP1) terminal, a second programming voltage (VPP2), or a ground terminal (GND) to a programming bus and/or to an antifuse to be programmed. The first and second current paths can be established using multiple such programming current multiplexer circuits.
摘要:
A programmable integrated circuit (see FIG. 13) includes a plurality of routing resources including collinearly extending routing wire segments and a test circuit for testing the integrity of the routing wire segments. The routing resource structures include a plurality of unprogrammed antifuses disposed between routing wire segments and a plurality of transistors disposed electrically in parallel with a corresponding respective one of the antifuses. The test circuit has a common node that may be coupled to a selected one of the routing resource structures for testing. In test mode, the test circuit detects whether a current flows through the selected routing resource structure and in response provides either a digital low value or a digital high value on an output node.
摘要:
A programming architecture for a field programmable gate array (FPGA) employing antifuses is disclosed. To test the integrity of programming conductors, programming transistors, routing wire segments and a combinatorial portion of a logic module of the unprogrammed FPGA (see FIG. 16), a combination of digital logic values is supplied onto the inputs of the combinatorial portion in a test mode. A defect is determined to exist if the correct digital value is not then output by the combinatorial portion. The digital value output by the combinatorial portion is captured in the flip-flop of the logic module and is shifted out of the FPGA in a scan out test mode. A programming transistor, programming conductor and routing wire segment structure is also disclosed which facilitates such testing. In one embodiment (see FIG. 15), the gate of no programming transistor coupled to an output routing wire segment of the logic module (such as transistor 216) is permanently connected to the gate of any programming transistor coupled to an input routing wire segment of the logic module (such as transistors 200, 201 and 202).
摘要:
A programming architecture for a field programmable gate array (FPGA) employing antifuses is disclosed. In one aspect, the number of programming conductors and the number of perpendicular programming control conductors for a logic module are substantially equal. In another aspect, programming current is supplied onto long routing wire segments via two programming transistors and two programming conductors. In another aspect, a pattern of programming drivers alternates from one side of the integrated circuit to the opposite side from one column of macrocells to the next. In other aspects, control conductors and programming conductors are tested with test antifuses and test transistors. In another aspect, adjacent logic modules have mirrored structures so that they can share an intervening programming conductor resource. In another aspect, L-shaped programming power busses are provided and in another aspect, an express wire is simultaneously driven with programming current from two different programming voltage terminals. In other aspects, a test circuit tests the integrity of collinear routing wire segments and output programming transistors are tested. In another aspect, antifuses on branches of clock conductors are programmed.