The development of semi-conductor technology has made the scales and performance of the integrated circuits reach an unprecedented stage from the electronic circuit unit with single function to SoC (system on a chip).

• 半导体技术的发展使集成电路的规模和性能达到了空前的阶段，已经由功能单一的电路单元发展到了片上系统SoC(system on a chip)。