![Image](/./qsource/plugin/uhome/template/assets/img/user_home_headerbg.jpg)
2440核心板的2个SDRAM的数据线和地址线要等长吗
2012-9-5 13:02
- PCB技术
- 10
- 3731
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
pads9.3汉化绿色精简版(附绿色汉化全功能版下载地址)
2013-11-27 17:00
- PCB技术
- 19
- 11677
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
AD6画PCB的一个问题
2012-9-2 18:10
- PCB技术
- 4
- 2527
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
看了这个民营企业500强榜单,感慨啊
2012-9-4 15:57
- 电子技术交流论坛
- 17
- 2337
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
第二期抽奖结果
2012-9-10 14:13
- 英飞凌MCU论坛
- 28
- 3091
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
芯片晶振不起振?
2017-10-19 16:18
- 侃单片机论坛
- 14
- 3607
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
天朝史记之周克华传
2012-8-31 15:14
- 情感婚姻研习社
- 20
- 3041
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
大家指点下这板的问题
2012-8-30 10:19
- PCB技术
- 9
- 1878
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
ARM9开发板谁的好
2014-5-12 10:05
- ARM技术论坛
- 21
- 13250
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
学习的迷茫
2012-8-28 19:27
- PCB技术
- 7
- 1508
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
4层叠合结构
2012-9-2 21:40
- PCB技术
- 6
- 1812
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
求助datasheet
2012-8-28 13:14
- PCB技术
- 4
- 1656
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
晶振的布线问题
2015-3-14 21:55
- PCB技术
- 18
- 9490
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
pcb内电层分割
2012-8-30 14:07
- PCB技术
- 6
- 1932
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
protel 能不能多次使用一个子图?
2012-8-29 10:21
- PCB技术
- 5
- 1651
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
1975年的无线电杂志,非常有味道
2015-8-13 10:26
- ST MCU
- 17
- 2933
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
32768的无源晶振怎么四个脚啊?
2013-1-3 00:02
- 电子技术交流论坛
- 12
- 4823
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
上传我们开发了一年多的ALIENTEK STM32豪华版靓图
2014-7-29 11:45
- ST MCU
- 60
- 9055
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
PCB电路板短路后如何确定问题
2012-8-27 21:30
- 电子技术交流论坛
- 18
- 4219
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
2
3
近期访客