说明：  单片机键盘驱动资料，包括键盘接口技术介绍、扫描法矩阵键盘驱动程序、行列反转法矩阵键盘驱动程序、AT89S52单片机键盘接口原理图等。程序有详细的注释。资料基于AT89S52单片机系统，键盘为4×4矩阵键盘。
(Singlechip keyboard-driven information, including the keyboard interface technology, the scanning matrix keyboard driver, the ranks of matrix inversion method keyboard driver, AT89S52 Singlechip schematics, such as the keyboard interface. Procedures detailed notes. AT89S52 Single-chip-based information system, the keyboard for 4 × 4 matrix keyboard.)