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

What is this strange memory configuration of a SRAM device?

Status
Not open for further replies.

BGA

Advanced Member level 4
Joined
Apr 25, 2001
Messages
111
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Activity points
751
Memory Configuration....

I'm searching for SRAM device to use with a Analog ADSP-21160.
I don't understand the memory configuration of the device I found!
256K x 36
512K x 36
1Meg x 18....
Why this strange format? Why not a data widht of 16 or 32 bit?
 

gabby

Member level 5
Joined
Mar 18, 2002
Messages
94
Helped
4
Reputation
8
Reaction score
4
Trophy points
1,288
Location
Israel
Activity points
1,239
Hi
some kind of application need for evry8bit 1bit aditional for test and repair
some type of memory controllers test that bit to be sure that the data not
fail.(is an inportant safety bit in importat system or servers)

As you know in computer you can find memory that have the aditional
option that called ECC that also the aditional bit.

Best regards. 8)
 

ted

Full Member level 3
Joined
Mar 12, 2002
Messages
182
Helped
28
Reputation
56
Reaction score
24
Trophy points
1,298
Activity points
2,875
... and I would add: If the device with x18 /x36 architecture is otherwise suitable, available, and of right price (and you do not need error checking or correction (parity / ECC)), you can use them and leave the extra bits unused. However, you should use for example a weak pull-up or pull-down on those extra data lines to prevent them to settle halfways between logic levels: It is not good - it may lead to excessive power dissipation and reliability problems.

Ted
 

BGA

Advanced Member level 4
Joined
Apr 25, 2001
Messages
111
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Activity points
751
Thanks a lot for the fast replay.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top