Configurable logic block for PLD with logic gate for combining output with another configurable logic block

A configurable logic block comprising:

• a plurality of function generators including at least a first function generator and a second function generator, each function generator receiving a plurality of input signals and providing an output signal;
• a carry chain comprising a plurality of multiplexers each controlled by one of the function generators comprising at least a first multiplexer controlled by the first function generator and a second multiplexer controlled by the second function generator, each multiplexer receiving two input signals and providing an output signal, the output signal of the first multiplexer serving as one of the input signals of the second multiplexer, the second multiplexer providing as its output signal a carry chain output signal;
• and
• a sum-of-products gate providing a sum-of-products gate output signal and receiving as input signals the carry chain output signal and a sum-of-products gate output signal from another configurable logic block.

A configurable logic block (CLB) for a programmable logic device (PLD) comprising:

• a first CLB slice having:
• at least two first slice configurable function generators each receiving a plurality of input signals and generating an output signal;
• a first structure for generating a first output signal from the output signals of the at least two first slice configurable function generators;
• and
• a first combining gate for combining the first output signal with a first combining gate input signal to generate a first combining gate output signal;
• a second CLB slice having:
• at least two second slice configurable function generators each receiving a plurality of input signals and generating an output signal;
• a second structure for generating a second output signal from the output signals of the at least two second slice configurable function generators;
• and
• a second combining gate generating a second
• slice output signal from the second output signal and the first combining gate output signal.

A configurable logic block (CLB) for a programmable logic device (PLD) comprising:

• a first CLB slice having:
• at least two configurable function generators each receiving a plurality of inputs and generating an output;
• and
• a logic gate receiving the function generator outputs and from them generating a first output;
• and
• a first combining gate for combining the first output with a combining gate input to generate a combining gate output,
• a second CLB slice comprising:
• a configurable function generator receiving a plurality of inputs and generating a second output;
• and
• a second combining gate for combining the second output with the combining gate output of the first CLB slice.

A configurable logic block (CLB) for a programmable logic device (PLD), the CLB comprising:

• a first CLB slice having:
• a first configurable function generator generating a first output;
• a second configurable function generator generating a second output;
• a dedicated function generator for receiving the first output and the second output to generate a dedicated output, the dedicated function generator having a first logic gate and a second logic gate;
• and
• a first combining gate for combining the dedicated output with a combining gate input to generate a first combining gate output;
• and
• a second CLB slice having:
• a second combining gate connected to the first combining gate to have the first combining gate output serve as an input to the second combining gate.