tag:blogger.com,1999:blog-9157671345275302973.post6793996258370992605..comments2023-10-31T11:00:18.727+08:00Comments on BuBuChen的旅遊記事本: DDR Interface Summary (DDR介面)BuBuChenhttp://www.blogger.com/profile/14583978202845639494noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-9157671345275302973.post-57197099765090187422023-08-03T12:50:46.261+08:002023-08-03T12:50:46.261+08:00對,dram controller要決定。對,dram controller要決定。BuBuChenhttps://www.blogger.com/profile/14583978202845639494noreply@blogger.comtag:blogger.com,1999:blog-9157671345275302973.post-7301057114268014412023-01-10T16:11:28.276+08:002023-01-10T16:11:28.276+08:00了解!所以SoC會自己判斷需不需要使用Mask Write的樣子!了解!所以SoC會自己判斷需不需要使用Mask Write的樣子!Tedhttps://www.blogger.com/profile/11683305954117546701noreply@blogger.comtag:blogger.com,1999:blog-9157671345275302973.post-27503514997659762692022-01-27T23:22:37.085+08:002022-01-27T23:22:37.085+08:00Hi Ted,
通常DQ是一次連續送八筆data,但有時並不是八筆都想要寫進DRAM裡,所以用DM...Hi Ted,<br /><br />通常DQ是一次連續送八筆data,但有時並不是八筆都想要寫進DRAM裡,所以用DM這個訊號把要寫進DRAM和不寫進DRAM的data標示出來。<br /><br />查了一下JEDEC standard,DDR4的DM是低電位時,其相對應的DQ是不要寫入DRAM的。BuBuChenhttps://www.blogger.com/profile/14583978202845639494noreply@blogger.comtag:blogger.com,1999:blog-9157671345275302973.post-50144844624412527692022-01-25T15:07:19.499+08:002022-01-25T15:07:19.499+08:00您好,想請問DDR4的情況下,何謂DQ被DM框住阿?是指高電位還是低電位呢?DM的功用何在😯您好,想請問DDR4的情況下,何謂DQ被DM框住阿?是指高電位還是低電位呢?DM的功用何在😯Tedhttps://www.blogger.com/profile/11683305954117546701noreply@blogger.com