Logic integrated circuit
A logic integrated circuit includes a switch cell array. The switch cell array includes: a plurality of first wirings extending in a first direction; a plurality of second wirings extending in a second direction; a switch cell including a unit element including two serially connected resistance-changing elements, and a cell transistor to be connected to a shared terminal of the two resistance-changing elements; and a bit line to which the shared terminal is connected via the cell transistor. Two of the switch cells adjacent to each other in the first direction are each connected to the different first wiring and second wiring, and share the bit line, and a diffusion layer to which the bit line is connected.
1. A logic integrated circuit comprising
a switch cell array including
a plurality of first wirings extending in a first direction,
a plurality of second wirings extending in a second direction,
a switch cell including a unit element including two serially connected resistance-changing elements, and a cell transistor to be connected to a shared terminal of the two resistance-changing elements, and
a bit line to which the shared terminal is connected via the cell transistor, wherein
the two switch cells adjacent to each other in the first direction
are each connected to the different first wiring and the different second wiring, and
share the bit line, and a diffusion layer to which the bit line is connected.
2. The logic integrated circuit according to claim 1 , wherein
one end of the unit element is connected to one of the first wirings,
another end of the unit element is connected to one of the second wirings, and
the shared terminal is connected to one of the bit lines via the cell transistor.
3. The logic integrated circuit according to claim 1 , wherein
the switch cell array includes
a first selection line extending in the first direction, and
a second selection line extending in the second direction, and
gates of the cell transistors of the two switch cells adjacent to each other in the first direction are each connected to the different second selection line.
4. The logic integrated circuit according to claim 3 , wherein
the switch cell array includes
a first transistor to be connected to the first wiring,
a second transistor to be connected to the second wiring,
a third transistor to be connected to the bit line,
a first control line to be connected to the second wiring via the second transistor,
a second control line to be connected to the first wiring via the first transistor, and
a third control line to be connected to the bit line via the third transistor.
5. The logic integrated circuit according to claim 4 , wherein,
regarding the two switch cells adjacent to each other in the first direction,
gates of the first transistor and the third transistor are each connected to the different first selection line,
a gate of the second transistor is connected to the different second selection line, and
the two switch cells are each connected to the different first selection line via the first transistor connected to the different first wiring.
6. The logic integrated circuit according to claim 4 , wherein,
regarding the two switch cells adjacent to each other in the first direction,
gates of the first transistor and the third transistor are each connected to the common first selection line,
a gate of the second transistor is connected to the different second selection line, and
the two switch cells are each connected to the common first selection line via the first transistor connected to the different first wiring.
7. The logic integrated circuit according to claim 4 , wherein
the two switch cells adjacent to each other in the first direction are each connected to the different second selection line via the different second transistor.
8. The logic integrated circuit according to claim 4 , wherein
the switch cell is connected to the second selection line constituted of two gate electrodes.
9. The logic integrated circuit according to claim 1 , further comprising:
a configuration port to which a signal including configuration information for forming a desired logic circuit is input;
a configuration circuit that outputs a signal to the switch cell array, based on a signal including the configuration information input from the configuration port, and performs writing and reading of data of the switch cell array; and
a general-purpose port to which data to be written in the switch cell array are input, and data read out from the switch cell array are output.
10. The logic integrated circuit according to claim 4 , further comprising:
a configuration port to which a signal including configuration information for forming a desired logic circuit is input;
a configuration circuit that outputs a signal to the switch cell array, based on a signal including the configuration information input from the configuration port, and performs writing and reading of data of the switch cell array;
a general-purpose port to which data to be written in the switch cell array are input, and data read out from the switch cell array are output;
a control circuit that outputs an address pre-decode signal for selecting the desired switch cell, based on address data included in a signal from the configuration circuit;
a first selection circuit that selects, based on the address pre-decode signal, the first selection line to which the desired switch cell is connected, and outputs a first decoded signal for selecting the first control line;
a first driver that supplies a voltage to the first control line according to the first decoded signal;
a second selection circuit that selects, based on the address pre-decode signal, the second selection line to which the desired switch cell is connected, and outputs a second decoded signal for selecting the second control line;
a second driver that supplies a voltage to the second control line according to the second decoded signal; and
a readout circuit that senses a resistance state of the switch cell via the third control line, and outputs read output data to the control circuit.