Semiconductor circuit capable of swapping signal paths and semiconductor apparatus using the same

A semiconductor circuit comprising:

• a first pad;
• a second pad;
• a third pad;
• an internal circuit configured to receive a first external signal and a second external signal, and generate a first internal signal and a second internal signal;
• and
• a swapping circuit configured to, based on master information, swapping information, and a mode signal, couple the internal circuit to the first pad to provide a path through which the first internal signal is output and a path through which the first external signal is received or couple the internal circuit to the first pad to provide a path through which the second internal signal is output and a path through which the second external signal is received, couple the internal circuit to the second pad to provide a path through which the second internal signal is output and a path through which the second external signal is received or couple the internal circuit to the second pad to provide a path through which the first internal signal is output and a path through which the first external signal is received, and couple the internal circuit to the third pad to provide a path through which the first external signal is received.