Semiconductor integrated circuit and method of controlling column switch of semiconductor integrated circuit in write operation

A semiconductor integrated circuit comprising:

• a memory cell including a memory element and a transfer switch for connecting the memory element with a bit line;
• a column switch for transmitting data to said bit line;
• a sense amplifier for amplifying data transmitted to said bit line;
• and
• a control unit for controlling said transfer switch, said column switch, and said sense amplifier, and for turning on said column switch before turning on said transfer switch, in a write operation.

A semiconductor integrated circuit comprising:

• a memory cell including a memory element and a transfer switch for connecting the memory element with a bit line;
• a column switch for transmitting data to said bit line;
• a sense amplifier for amplifying data transmitted to said bit line;
• and
• a control unit for controlling said transfer switch, said column switch, and said sense amplifier, and for disabling the amplifying operation of said sense amplifier in a write operation to directly write data transmitted to said bit line through said column switch to said memory cell.

A method of controlling a column switch of a semiconductor integrated circuit in a write operation, said semiconductor integrated circuit comprising:

• a memory cell including a memory element and a transfer switch for connecting the memory element with a bit line;
• a column switch for transmitting data to said bit line;
• a sense amplifier for amplifying data transmitted to said bit line, said method comprising the step of
• turning on said column switch after the turning-on of said transfer switch and before the start of the amplifying operation of said sense amplifier in a write operation.

A method of controlling a column switch of a semiconductor integrated circuit in a write operation, said semiconductor integrated circuit comprising:

• a memory cell including a memory element and a transfer switch for connecting the memory element with a bit line;
• a column switch for transmitting data to said bit line;
• and
• a sense amplifier for amplifying data transmitted to said bit line, said method comprising the step of
• turning on said column switch before turning on said transfer switch in a write operation.

A method of controlling a column switch of a semiconductor integrated circuit in a write operation, said semiconductor integrated circuit comprising:

• a memory cell including a memory element and a transfer switch for connecting the memory element with a bit line;
• a column switch for transmitting data to said bit line;
• a sense amplifier for amplifying data transmitted to said bit line, said method comprising the step of:
• disabling the amplification of said sense amplifier in a write operation;
• and
• directly writing data transmitted to said bit line through said column switch to said memory cell in said write operation.