Semiconductor integrated circuit device and method of operating the same

A semiconductor integrated circuit device comprising:

• a central processing unit (CPU) configured to output first control signals in response to a first clock signal;
• a first bus connected to the CPU;
• a bridge circuit connected to the first bus;
• a second bus connected to the bridge circuit;
• at least one peripheral circuit connected to the second bus;
• and
• a clock monitor connected to one of the first bus and the second bus, the clock monitor configured to output a register value corresponding to a second clock signal to the bridge circuit, the bridge circuit being configured to receive the first control signals, generate second control signals based on the register value, and output the second control signals to one of the at least one peripheral circuit via the second bus.

A synchronization method comprising:

• generating first control signals in response to a first clock signal;
• generating a second clock signal based on the first clock signal and a predetermined divisor;
• generating a register value based on the second clock signal;
• and
• outputting second control signals based on the register value and the first control signals.