Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Accessing SDR-SDRAM in comparison to DDR-SDRAM

Status
Not open for further replies.

tavidu

Member level 1
Joined
Oct 21, 2004
Messages
40
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
343
sdram controller

Hi,
1. For SDR-SDRAM, the first access is BANK0-ROW5, the second access is BANK1-ROW5, between the two access, precharge is need? It's the case for DDR-SDRAM?
2. For SDR-SDRAM, the first access is BANK0-ROW5, the second access is BANK1-ROW9, between the two access, precharge is need? It's the case for DDR-SDRAM?
 

gaonkc

Advanced Member level 4
Joined
Jul 16, 2004
Messages
104
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
635
sdram controller

You don't need use precharge between two access for different bank. But you must meet the timing tRRD between two active command. DDR-SDRAM is same.
 

tom123

Advanced Member level 4
Joined
Apr 4, 2005
Messages
116
Helped
5
Reputation
10
Reaction score
2
Trophy points
1,298
Activity points
2,338
Re: sdram controller

In SDR and DDR sdram, you can open each BANK's row simultaneously,

if you access different bank's row, you need not use precharge between

two access.




tavidu said:
Hi,
1. For SDR-SDRAM, the first access is BANK0-ROW5, the second access is BANK1-ROW5, between the two access, precharge is need? It's the case for DDR-SDRAM?
2. For SDR-SDRAM, the first access is BANK0-ROW5, the second access is BANK1-ROW9, between the two access, precharge is need? It's the case for DDR-SDRAM?
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top