在一个analog macro端口上,有些pin是always on的,有些是shut down的,如何描述这些pin的power属性?这是一个常见问题,驴就此机会大致描述一下常见的做法.对于这个问题,UPF2.0跟UPF2.1有不同的处理方式. UPF2.0, IEEE1801-2009,因为modeling的能力比较弱,有以下两种方式来处理: 方式一:需要Library的支持: 需要在library里有电源跟地的定义 pg_pin(VDDA) {     voltage_name : VDD…

Low-cost, 8-bit, single-chip microcontrollers are stingy when it comes to on-chip PWM (pulse-width-modulation) resources. The use of a PWM resource often forces a designer to sacrifice a capture/compare or timer channel because the PWM channel shares…

switching network的层次: 一般选择flatted的形式,hierarchy的结构对voltage drop和performance delay有影响. Power network的结构: external的power rail switch,可以最大限度的减少leakage的消耗,而且对片内设计无影响,对板级要求很高. power恢复的过程会比较长,而且in-rush的current也会比较大. 一般会有几个rail有External来提供: 1)IO Power 2)Alwa…

http://www.planetanalog.com/author.asp?section_id=3041&doc_id=563055 Jonathan Harris, Product Applications Engineer, Analog Devices, 6/2/2014 As I thought about where to go with the next blog, I looked over the comments and questions from my previous…

#ifndef CONFIG_H_ #define CONFIG_H_ /**************************************************************************/ /**** CONFIGURABLE PARAMETERS ****/ /**** 可配置参量 ****/ /**** ****/ /**** 2013.10.28最新MWC程序注释翻译 ****/ /**** Translater:Dexter ****/ /**** 本…

---恢复内容开始--- OBDII Interface Project When I can ever find enough time away from schoolwork, I try to work on an OBDII compliant portable ScanTool. However, with my current course load and lab projects progress on this project has been very slow. I fi…

Understanding the STM32F0's GPIO This is the first part of the GPIO tutorial for the STM32F0Discovery. The tutorial will include the following topics: Understanding the Structure of the GPIO Registers on the STM32F0 Microcontroller Understanding how…

一个处理器达到 200 DMIPS的性能,这是个什么概念? DMIPS全称叫Dhrystone MIPS 这项测试是用来计算同一秒内系统的处理能力,它的单位以百万来计算,也就是(MIPS) 上面的意思也就是,这个处理器测整数计算能力为(200*100万)条指令/秒. MIPSMillion Instructions Per Second的缩写,每秒处理的百万级的机器语言指令数.这是衡量CPU速度的一个指标.像是一个Intel 80386 电脑可以每秒处理3百万到5百万机器语言指令,既我们可以说8…

Overview Zephyr applications use the nrf52_pca10040 board configuration to run on the nRF52 Development Kit (PCA10040) hardware. It provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU and the following devices: NVIC SYSTICK UART…

对于MTK Camera驱动移植一般分为四部分: 1.硬件IO口配置: 2.Camera驱动移植: 3.上电时序. 4.改动i2c控制器: 硬件电路: 1.GPIO配置 打开 mediatek\dct\DrvGen.exe 选择 mediatek\custom\xiaoxi\kernel\dct\dct\codegen.dws 配置文件 设置前后摄像头的CMRST和CMPDN引脚.这是跟上电时序有关: 2.Camera驱动移植(以SP5507+SP2509为例) (1)将kernel层代码整个文…