This paper introduces the VHDL top down design method including scheme determination, hierarchy division, and VHDL application taking a digital code lock design for example.

文中以数字密码锁的设计为实例，从方案的确定，各阶层的划分，VHDL的应用，介绍了VHDL自顶向下的设计方法。

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A new kind of electronic and mechanical antitheft lock using digital code based on the technologies of PIC single-chip microcomputer, serial communication and wireless data transmission is introduced.

本文介绍了基于PIC单片机、串行通信技术和无线数据传输的新型数码防盗电子机械锁的设计。

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Now, Qualcomm is a promising telecom company with a lock on a technology (called code division multiple access) that is becoming the standard for digital cell phones.

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