摘要：本应用笔记介绍了一个电脑程序，免费下载，以协助在评价器MAX7219和MAX7221 LED显示驱动器。Maxim/Dallas > App Notes > DISPLAY DRIVERS Keywords: LED display drivers, LED drivers, display drivers, SPI, serial, 7 segment, 7-segment Oct 14, 2003 APPLICATION NOTE 2782 Using a PC to Experiment with the MAX7219 and MAX7221 LED Display Drivers This application note describes a PC program, downloadable for free, to assist in the evaluation of the MAX7219 and MAX7221 LED display drivers. The MAX7219 and MAX7221 are 8-digit, 7-segment, common-cathode, multiplexed, LED display drivers which drive up to 40mA peak segment current, while operating from a 4V to 5.5V supply. Control is accomplished through a 4-wire (MAX7219) or SPI (MAX7221) serial interface. This application note describes a utility program which allows up to 16 MAX7219 or MAX7221 drivers to be controlled from a PC.……