HCS300集成电路（IC）的专用IC规格书PDF中文资料

HCS300属于集成电路（IC）的专用IC。由微芯科技股份有限公司制造生产的HCS300专用 IC专用专用集成电路 (IC) 或芯片设计用于执行特定功能。这个类别包括可寻址开关、空芯仪表驱动器、音视频开关、验证芯片、自动放电、时钟发生器、彩色扫描仪，以及各种应用所用的其他许多集成电路。

INTRODUCTION

The purpose of this application note is to demonstrate how KEELOQ® code hopping technology can be conveniently employed to implement an automatic code hopping password generator/keypad.

Using a PIC12C508, the hopping code produced by an HCS300 is converted to a string of 16 hex digits. This string is then transferred to the PC via the keyboard line, thereby emulating the actual pressure of a sequence of keys on a standard PC/AT® keyboard. Since this conversion process is transparent to any application, it appears as if the user is simply typing on a PC/AT-type keyboard.