主芯片IO口复用设计方案研究  

Research on Reuse Design Scheme of IO Port of Main Chip

作　　者：李荫珑 丘珊珊 

机构地区：[1]珠海格力电器股份有限公司,珠海519070

出　　处：《日用电器》2022年第7期87-90,94,共5页ELECTRICAL APPLIANCES

摘　　要：在开发产品时,在电子元器件选型中,需要重点考虑降低成本,主芯片的选型往往需选择低成本芯片,而低成本的主芯片,其主要缺点往往为输入输出口(IO口)引脚有限,此时,如需要实现更多功能,便需要设计IO口复用电路的方案,包括硬件电路以及软件逻辑的设计。在IO口复用设计中,可设计选择口电路与显示电路复用;拨码开关电路与显示电路复用;选择口电路与2003芯片驱动电路复用;按键电路与显示电路的复用。根据功能需要,可选择相应的复用电路,解决主芯片IO口紧缺的问题,以便可选择低成本主芯片。When developing products,in the selection of electronic components,we need to focus onreducing costs.The selection of main chips often needs to choose low-cost chips,while the main disadvantage of low-cost main chips is that the pins of input and output ports (IO ports) are limited.At this time,if more functions need to be realized,we need to design the scheme of IO port multiplexing circuit,Including the design of hardware circuit and software logic.In the design of IO port multiplexing,the multiplexing of selection port circuit and display circuit can be designed;The dial switch circuit is multiplexed with the display circuit;The selection port circuit is multiplexed with the 2003 chip driver circuit;Multiplexing of key circuit and display circuit.According to the functional requirements,the corresponding multiplexing circuit can be selected to solve the shortage of IO port of the main chip,so that the low-cost main chip can be selected.

关 键 词：IO口 复用电路 主芯片 低成本 

分 类 号：TN402[电子电信—微电子学与固体电子学]