LED显示驱动器MAX7219和MAX7221的PC机使用实验

摘要：本应用笔记介绍了一个电脑程序，，以协助在评价器MAX7219和MAX7221LED显示驱动器。

Maxim/Dallas>AppNotes>DISPLAYDRIVERSKeywords:LEDdisplaydrivers,LEDdrivers,displaydrivers,SPI,serial,7segment,7-segmentOct14,2003APPLICATIONNOTE2782UsingaPCtoExperimentwiththeMAX7219andMAX7221LEDDisplayDriversThisapplicationnotedescribesaPCprogram,downloadableforfree,toassistintheevaluationoftheMAX7219andMAX7221LEDdisplaydrivers.TheMAX7219andMAX7221are8-digit,7-segment,common-cathode,multiplexed,LEDdisplaydriverswhichdriveupto40mApeaksegmentcurrent,whileoperatingfroma4Vto5.5Vsupply.Controlisaccomplishedthrougha4-wire(MAX7219)orSPI(MAX7221)serialinterface.Thisapplicationnotedescribesautilityprogramwhichallowsupto16MAX7219orMAX7221driverstobecontrolledfromaPC.