Semiconductor system and method of operating the same

A method of operating a semiconductor system, the method comprising:

• test-setting a first semiconductor device and a second semiconductor device based on a test signal;
• driving an original signal by the first semiconductor device using an initial driving force;
• transmitting the driven original signal as an external transmission signal to the second semiconductor device;
• generating a restoration signal based on the external transmission signal transmitted to the second semiconductor device;
• transmitting the restoration signal as the external transmission signal to the first semiconductor device;
• comparing the original signal with the external transmission signal transmitted from the second semiconductor device to the first semiconductor device;
• changing the initial driving force;
• driving the original signal by the first semiconductor device using the changed driving force;
• and
• transmitting the driven original signal as the external transmission signal to the second semiconductor device.