A 32 kbit OTP(one-time programmable)memory for MCUs(micro-controller units)used in remote controllers was designed.This OTP memory is used for program and data storage.It is required to apply 5.5V to BL(bit-line)and 1...A 32 kbit OTP(one-time programmable)memory for MCUs(micro-controller units)used in remote controllers was designed.This OTP memory is used for program and data storage.It is required to apply 5.5V to BL(bit-line)and 11V to WL(word-line)for a OTP cell of 0.35μm ETOX(EEPROM tunnel oxide)type by MagnaChip.We use 5V transistors on column data paths to reduce the area of column data paths since they require small areas.In addition,we secure device reliability by using HV(high-voltage)transistors in the WL driver.Furthermore,we change from a static logic to a dynamic logic used for the WL driver in the core circuit.Also,we optimize the WD(write data)switch circuit.Thus,we can implement them with a small-area design.In addition,we implement the address predecoder with a small-area logic circuit.The area of the designed 32 kbit OTP with 5V and HV devices is 674.725μm×258.75μm(=0.1745mm2)and is 56.3% smaller than that using 3.3V devices.展开更多
结合组态软件与可编程逻辑器件(PLC)之间的通信实例,介绍了基于工业以太网及OPC技术的iFIX与PLC的通信原理及实现过程,以及相关技术的概念及特点。OPC全称是对象的链接和嵌入技术(OLE) for Process Control,该系统以KEPSe-rverEx作为OP...结合组态软件与可编程逻辑器件(PLC)之间的通信实例,介绍了基于工业以太网及OPC技术的iFIX与PLC的通信原理及实现过程,以及相关技术的概念及特点。OPC全称是对象的链接和嵌入技术(OLE) for Process Control,该系统以KEPSe-rverEx作为OPC服务器,在西门子S7-300系列PLC与iFIX软件(OPC客户端)之间建立通信。工业以太网及OPC技术的应用,提高了通信的速度及系统的扩展性。实际运行表明,基于工业以太网及OPC技术的iFIX与PLC之间通信的稳定性。展开更多
基金Project supported by the Second Stage of Brain Korea 21 Projects,Korea
文摘A 32 kbit OTP(one-time programmable)memory for MCUs(micro-controller units)used in remote controllers was designed.This OTP memory is used for program and data storage.It is required to apply 5.5V to BL(bit-line)and 11V to WL(word-line)for a OTP cell of 0.35μm ETOX(EEPROM tunnel oxide)type by MagnaChip.We use 5V transistors on column data paths to reduce the area of column data paths since they require small areas.In addition,we secure device reliability by using HV(high-voltage)transistors in the WL driver.Furthermore,we change from a static logic to a dynamic logic used for the WL driver in the core circuit.Also,we optimize the WD(write data)switch circuit.Thus,we can implement them with a small-area design.In addition,we implement the address predecoder with a small-area logic circuit.The area of the designed 32 kbit OTP with 5V and HV devices is 674.725μm×258.75μm(=0.1745mm2)and is 56.3% smaller than that using 3.3V devices.
文摘光束线站真空安全联锁是保障同步辐射光源储存环的运行安全与线站关键设备安全的重要系统。文章阐述了合肥光源新建成的金华光束线站真空安全联锁系统的最新设计方法。基于新型的高性能可编程控制器PLC(Programmable Logic Controller)和开放的软件平台EPICS 7(Experimental Physics and Industrial Control System)分布式控制系统架构,同时采用虚拟化技术,开发了全新的光束线站真空安全联锁系统。在系统远控的OPI界面开发上,采用Python脚本一键自动生成,提高了系统开发效率。此次设计在确保系统安全性和可靠性的同时,系统的性能以及用户人机交互的体验都得以提升。这些设计方法为正在建设的合肥先进光源的光束线站控制提供了技术储备和实践经验。
文摘结合组态软件与可编程逻辑器件(PLC)之间的通信实例,介绍了基于工业以太网及OPC技术的iFIX与PLC的通信原理及实现过程,以及相关技术的概念及特点。OPC全称是对象的链接和嵌入技术(OLE) for Process Control,该系统以KEPSe-rverEx作为OPC服务器,在西门子S7-300系列PLC与iFIX软件(OPC客户端)之间建立通信。工业以太网及OPC技术的应用,提高了通信的速度及系统的扩展性。实际运行表明,基于工业以太网及OPC技术的iFIX与PLC之间通信的稳定性。
