摘要:
A programmable logic array integrated circuit has a plurality of programmable logic elements grouped into a plurality of mutually exclusive groups. Each group includes signal conductors uniquely associated with that group for conveying signals between the programmable logic elements in that group. Other signal conductors are provided for conveying signals between the groups. Multiplexers can be used in various ways to reduce the number of programmable interconnections required between signal conductors.
摘要:
A programmable logic array integrated circuit has a plurality of programmable logic elements grouped into a plurality of mutually exclusive groups. Each group includes signal conductors uniquely associated with that group for conveying signals between the programmable logic elements in that group. Other signal conductors are provided for conveying signals between the groups. Multiplexers can be used in various ways to reduce the number of programmable interconnections required between signal conductors.
摘要:
A programmable logic array integrated circuit has a number of programmable logic modules which are grouped together in a plurality of logic array blocks ("LABs"). The LABs are arranged on the circuit in a two dimensional array. A conductor network is provided for interconnecting any logic module with any other logic module. In addition, adjacent or nearby logic modules are connectable to one another for such special purposes as providing a carry chain between logic modules and/or for connecting two or more modules together to provide more complex logic functions without having to make use of the general interconnection network. Another network of so-called fast or universal conductors is provided for distributing widely used logic signals such as clock and clear signals throughout the circuit. Multiplexers can be used in various ways to reduce the number of programmable interconnections required between signal conductors.
摘要:
A programmable logic array integrated circuit has a plurality of programmable logic elements grouped into a plurality of mutually exclusive groups. Each group includes signal conductors uniquely associated with that group for conveying signals between the programmable logic elements in that group. Other signal conductors are provided for conveying signals between the groups. Multiplexers can be used in various ways to reduce the number of programmable interconnections required between signal conductors.
摘要:
A programmable logic device architecture with a highly routable programmable interconnect structure. The arrangement of the logic array blocks (LABs), programmable interconnect structure, and other logical elements forms a Clos network. After specific constraints have been met, the architecture is guaranteed to route. The architecture is provably routable when there is no fan-out in the middle stage. A LAB (A-200) comprises an input multiplexer region (A-504), logic elements (A-300), input-output pins (A-516), and output multiplexer region (A-508). Furthermore, a logic device and a method of operating a logic device. The device includes logic elements (B-240) that perform desired logic functions and routing functions. The logic elements (B-240) are arranged in larger logic blocks known as logic array blocks (B-230) that have local interconnection systems. The logic array blocks (B-230) are configured to provide global interconnections. The configuration provides a Clos network, whereby a signal may be routed from any input to any output without blocking.
摘要:
A programmable logic device architecture with a highly routable programmable interconnect structure. The arrangement of the logic array blocks (LABs), programmable interconnect structure, and other logical elements forms a Clos network. After specific constraints have been met, the architecture is guaranteed to route. The architecture is provably routable when there is no fan-out in the middle stage. A LAB (200) comprises an input multiplexer region (504), logic elements (300), input-output pins (516), and output multiplexer region (508).
摘要:
A programmable logic device architecture with a highly routable programmable interconnect structure. The arrangement of the logic array blocks (LABs), programmable interconnect structure, and other logical elements forms a Clos network. After specific constraints have been met, the architecture is guaranteed to route. The architecture is provably routable when there is no fan-out in the middle stage. A LAB (200) comprises an input multiplexer region (504), logic elements (300), input-output pins (516), and output multiplexer region (508).
摘要:
A storage element for use in a logic array including a flip-flop device and a complex logic circuit interconnected in such a way that the output of the complex logic circuit is an input to the flip-flop. A Toggle Flip-Flop Control (TFFC) signal, an invert control (INV) signal, and a clock (CLK) signal are also inputs to the complex logic circuit. The output of the flip-flop connects to an output pad, an internal direct feedback line which is one of the means by which the flip-flop is connected to the comples logic circuit, and an external feedback bus which leads back to an associated AND-OR array. The inptu to the complex logic circuit is generated by the standard AND-OR array which is programmable to some degree.
摘要:
A programmable logic device (PLD) can be configured using configuration data stored on a memory. The configuration data is compressed using a compression algorithm before being stored on the memory. When the PLD is to be configured, the compressed configuration data is read from the memory, decompressed, then loaded onto the PLD.
摘要:
A programmable logic configuration device is disclosed having a configuration memory accessible by a controller of the configuration device and by a second device. Arbitration circuitry is provided for arbitrating access to the configuration memory between the configuration controller and the second device.