大体可分为五个部分,不排除有特例. 第一部分说明器件归属的器件系列, 第二部分说明器件的封装类型, 第三部分说明器件的引脚数目, 第四部分说明器件的工作温度范围, 第五部分说明器件的速度等级. 实践中可通过如下步骤确定Part Number所指定的器件: 步骤一:找说明引脚数目的数字,亦即前述第三部分, 步骤二:找步骤一所述数字左边的第一个字母,亦即前述第二部分, 步骤三,找步骤二所述字母左边的剩余部分,亦即前述第一部分, 步骤四,找步骤一所述数字右边的第一个字母,亦即前述第四部分, 步骤五,找…

java.sql.SQLException: Io 异常: Invalid number format for port number   jdbc数据库链接配置没有写端口号 ​ 要检查jdbc的配置是否正确.…

报错信息: Caused by: java.sql.SQLException: Io 异常: Invalid number format for port number    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)    …

Q Numbers FormatAn XQN format number is an 1+X+N bit twos complement binary number; a sign bitfollowed by X integer bits followed by an N bit mantissa (fraction). XQN format can be usedto express numbers in the range (-2X) to (2X - 2(-N)). An equival…

来之\kernel\Documentation\devicetree\usage-model.txt Linux and the Device Tree -------------------------The Linux usage model for device tree data Author: Grant Likely <grant.likely@secretlab.ca> This article describes how Linux uses the device tree.…

http://elinux.org/Device_Tree_Usage Device Tree Usage     Top Device Tree page This page walks through how to write a device tree for a new machine. It is intended to provide an overview of device tree concepts and how they are used to describe a mac…

The QCOW2 Image Format https://people.gnome.org/~markmc/qcow-image-format.html The QCOW image format is one of the disk image formats supported by the QEMU processor emulator. It is a representation of a fixed size block device in a file. Benefits it…

转自:http://blog.chinaunix.net/uid-20522771-id-3457184.html 原文链接:http://devicetree.org/Device_Tree_Usage#How_Interrupts_Work   Device Tree Usage 设备树使用手册 This page walks through how to write a device tree for a new machine. It is intended to provide an…

驱动开发读书笔记. 0.05 linux 2.6 platform device register 平台设备注册 2/2 共2篇 下面这段摘自 linux源码里面的文档 : 内核版本2.6.22Documentation/driver-model/platform.txt找到一篇译文:http://blog.csdn.net/yili_xie/article/details/5193609 Device Enumeration 82 ~~~~~~~~~~~~~~~~~~ 83 As a rule…

Helpers\Number This helper has 2 methods for converting a number format and to get a percentage. Number::format($number, $prefix = '4') Converts a given number to start with a prefix, useful to making sure mobile numbers start with a 0 only when they…