Semiconductor integrated circuit

A semiconductor integrated circuit, comprising:

• a random access memory (RAM) including a plurality of memory cell selection signals;
• a first voltage level detection circuit that provides a first voltage level detection signal having a first voltage level logic level when a power supply potential is greater than a first detection potential and a second voltage level logic level when the power supply potential is less than the first detection potential;
• a first circuit coupled to receive the first voltage level detection signal and provide the plurality of memory cell selection signals in a memory cell unselected state when the first voltage level detection signal has the second voltage level logic level;
• and
• a second voltage detection circuit that detects when a power supply potential is less than a second detection potential lower than the first detection potential and provide a low voltage level indicator.

A semiconductor integrated circuit, comprising:

• a random access memory (RAM) coupled to receive at least one control signal;
• a first voltage level detection circuit that provides a first voltage level detection signal having a first voltage level logic level when a power supply potential is greater than a first detection potential and a second voltage level logic level when the power supply potential is less than the first detection potential;
• a first circuit coupled to receive the first voltage level detection signal and provide the at least one control signal in a RAM unselected state when the first voltage level detection signal has the second voltage level logic level;
• and
• a second voltage detection circuit coupled to detect when a power supply potential is less than a second detection potential lower than the first detection potential and provide a low voltage level indicator.