PD6121, 6122是用NEC传输格式的红外线遥控发射芯片,目前广泛的用在电视,录像机,音响,空调等设备上。8051系列单片机是目前应用最为广泛的8位机,其内核由美国因特公司设计。本文介绍如何用8051单片机准确接收红外遥控信号,并写出高效的代码。-PD6121, 6122 NEC transmission format with infrared remote control transmitter chip, now widely used in TV, VCR, stereo, air conditioning and other equipment. 8051 series of microcontrollers is the most widely used 8-bit machine, the kernel design by the American Internet company. This article describes how to use the infrared remote control receiver 8051 signals accurately, and to write efficient code.