System clock distributing apparatus and system clock distributing method

A multiprocessor system controller comprising:

• an internal clock generator that generates an internal clock having a frequency that is an integral multiple of an external clock based on the external clock, and
• a multiprocessor system controller that controls an external processor and an external memory access controller based on an operation by the internal clock.

A CPU comprising:

• an internal clock generator that generates an internal clock having a frequency that is an integral multiple of an external clock based on the external clock;
• and
• a processor that conducts a computing process using data stored in an external memory based on an operation by the internal clock.

A memory access controller comprising:

• an internal clock generator that generates an internal clock having a frequency that is an integral multiple of an external clock based on the external clock;
• and
• a memory access processor that controls an access to an external memory based on an operation by the internal clock.

A crossbar comprising:

• an internal clock generator that generates an internal clock having a frequency that is an integral multiple of an external clock based on the external clock;
• and
• a crossbar processor that controls a communication among a plurality of multiprocessor system controllers based on an operation by the internal clock.