DRC - Digital reality crew logo
DRC Forum | Register | Log in | Forum help | Search

Memory timing explained


DRC Forum
» Personal Interests
    » Computers
        » Memory timing explained
            » Page 1 of 1

  Post new topicReply to topic

Author Message
|DRC| Wartex






Tuesday, March 29 2005, 00:33:39 #23573     Memory timing explained


CAS Latency
The CAS latency is the delay, in clock cycles, between sending a READ command and the moment the first pice of data is available on the outputs.


tWR - Write Recovery Time:
tWR is the number of clock cycles taken between writing data and issuing the precharge command. tWR is necessary to guarantee that all data in the write buffer can be safely written to the memory core.


tRAS - Row Active Time:
tRAS is the number of clock cycles taken between a bank active command and issuing the precharge command.


tRC - Row Cycle Time:
The minimum time interval between successive ACTIVE commands to the same bank is defined by tRC.
tRC = tRAS + tRP


tRCD - Row Address to Column Address Delay:
tRCD is the number of clock cycles taken between the issuing of the active command and the read/write command. In this time the internal row signal settles enough for the charge sensor to amplify it.


tRP - Row Precharge Time:
tRP is the number of clock cycles taken between the issuing of the precharge command and the active command. In this time the sense amps charge and the bank is activated.


tRRD - Row Active to Row Active Delay:
The minimum time interval between successive ACTIVE commands to the different banks is defined by tRRD.


tCCD - Column Address to Column Address Delay


tRD - Active to Read Delay ?:


tWTR - Internal Write to Read Command Delay:
tWTR is the delay that has to be inserted after sending the last data from a write operation to the memory and issuing a read command.


tRDA - Read Delay Adjust
----------------------------------------

More here: http://www.hardforum.com/showpost.php?p=1026130732&postcount=4
_________________

Profile | Send PM | WWW | AIM | YIM | MSN | SKYPE | ICQ
 
Sponsored Ad






Today #     Sponsored Ads


WWW
 
|DRC| Marblecake






Tuesday, March 29 2005, 19:06:19 #23601     


He explainedededed it. Yehaw.
_________________
"Shrink" Are you a assasin? "Me" Assasin sounds so exotic. Im just a murderer.
Profile | Send PM | AIM | YIM | MSN | SKYPE | ICQ
 
Cannonfodder






Sunday, April 3 2005, 21:24:10 #23976     


what about finding out what kind of ram is in a box?
Profile | Send PM | WWW | MSN | ICQ
 
Display posts from previous:   


Jump to 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Optimized with phpBB SEO
Questions? Contact us at fubar_38-107-179-237@wartex.net