Semiconductor integrated device and apparatus for designing the same

A semiconductor integrated device, comprising:

• a first circuit unit to which electric power is supplied from a first power supply wiring and a second power supply wiring;
• a second circuit unit to which electric power is supplied from a third power supply wiring and a fourth power supply wiring;
• a first interface circuit unit formed in the first circuit unit;
• and
• a second interface circuit unit formed in the second circuit unit, the second interface circuit unit being configured to perform any of inputting and outputting a signal to and from the first interface circuit unit,
• wherein the second power supply wiring is coupled to the fourth power supply wiring at a node.

An apparatus for designing a semiconductor integrated device, comprising the steps of:

• specifying a first interface circuit unit to be formed in a first circuit unit to which electric power is supplied from first power supply wiring;
• specifying a second interface circuit unit to be formed in a second circuit unit to which electric power is supplied from second power supply wiring, the second interface circuit unit configured to input and/or output a signal to and from the first interface circuit unit;
• and
• arranging the first interface circuit unit and the second interface circuit unit closely to each other in accordance with a predetermined placement rule.

An apparatus for designing a semiconductor integrated device, comprising the steps of:

• specifying a first interface circuit unit to be formed in a first circuit unit to which electric power is supplied from first power supply wiring;
• specifying a second interface circuit unit to be formed in a second circuit unit to which electric power is supplied from second power supply wiring;
• and
• performing wiring design so as to reduce wiring delay between the first interface circuit unit and the second interface circuit unit in accordance with a predetermined placement rule.

An apparatus for designing a semiconductor integrated device comprising the steps of:

• modifying connection information so as to short circuit a first element having a connection terminal coupled to first power supply wiring;
• modifying the connection information so as to short circuit a second element having a connection terminal coupled to the second power supply wiring;
• providing different names respectively to different power pads in the first power supply wiring and the second power supply wiring;
• specifying a node where terminals provided with the different names are short circuited;
• and
• performing predetermined element modification concerning the specified node.

An apparatus for designing a semiconductor integrated device, comprising the steps of:

• obtaining a first cell for which connection information is modified so as to short circuit a first element having a connection terminal coupled to first power supply wiring and replacing the first element with the first cell;
• obtaining a second cell for which the connection information is modified so as to short circuit an element having a connection terminal coupled to the second power supply wiring and replacing the second element with the second cell;
• providing different names respectively to the first power supply wiring and the second power supply wiring;
• specifying a node where terminals provided with the different names are short circuited;
• and
• performing predetermined element modification concerning the specified node.