基于联电55纳米超低功耗工艺物联网平台

Io T Platform based on UMC 55nm Ultra Low Power Process

随着工艺技术的发展,55纳米工艺技术已逐渐成为低功耗芯片的主流工艺。作为集成电路最新技术代表,MCU已经成为集成电路设计领域的研究热点并得到越来越广泛的应用。对电池供电的便携式设备而言,除了要考虑性能和成本外,功耗问题已经成为一个重要的因素。本文选择对ARM Cortex-M3进行低功耗设计,ARM Cortex-M系列作为全球应用最广的CPU,其在低功耗方面的表现令人满意。1M字节的大容量嵌入式闪存可以储存所需的代码与数据。低功耗锁相环与振荡器IP使用于本平台。为降低芯片负载波动及电源干扰对系统输出的影响以提高芯片性能,一种无片外电容低压差线性稳压器IP也用于本平台。本文使用的12位SAR ADC原理简单、电路易实现,并且由于中等速度、中等分辨率和较低功耗而广泛应用于嵌入式系统中。本文的低功耗平台设计,不但降低了功耗,更获得了在超低功耗工艺节点的设计经验,利于向需要低功耗的微控制器与物联网应用推广。

With the development of technology, 55 nm CMOS process technology has gradually become the mainstream for low power chip design. Micro-controller, as a representative of the latest technology of IC industry, is being used increasingly. Except for the performance and cost consideration, power consumption becomes an important factor for handheld devices powered by battery. This paper carries out the low power platform by ARM Cortex-M3 CPU. The ARM Cortex-M Series has been widely implanted world-wide for its perfectly satisfactory of low power capability. 1M bytes large size of embedded flash memory can be used to store more code and data. Low-power PLL and oscillator IP are used on this platform. In order to reduce chip load fluctuations and power supply noise on the system output,thereby improving system performance, a capacitor-free LDO regulator is used on this platform as well. The 12-bit SAR ADC used in this paper is relatively simple, which is widely used in embedded systems because of the medium speed, moderate resolution and low power consumption. The low power platform which is presented in this paper, not only reduces the power consumption, but also gets the low power design experiences at the ultra low-power process node. We can promote the low power technologies to MCU and IoT applications.