[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 457
  • Last Modified:

68HC11, DRAM, SPI, X25020

everyone,
i have 2 questions that i'm currently investigating.

1:
i'm trying to investigate how to use a DP8428 DRAM with a 128k x 8 DRAM chips.
i also want to know how much overhead is is lost due to necessary refreshing
http://eshop.engineering.uiowa.edu/NI/pdfs/00/86/DS008649.pdf
http://www.datasheetcatalog.com/datasheets_pdf/D/P/8/4/DP8428.shtml

2:
how do i interface X25020 to the 68HC11 SPI embedded function. i also need to write a device driver in C that provides a way to read any particular addressed byte. that is, calling the device driver w/ an argument address will retrun the char stored at that address in the X25020.
 http://www.alldatasheet.co.kr/datasheet-pdf/view/XICOR/X25020.html
http://www.alldatasheet.co.kr/view.jsp

i know a little bit of C but haven't programmed in a while so any input, advice, direction, sample etc will be greatly appreciated.

thx
-r
0
ransula
Asked:
ransula
  • 3
  • 2
1 Solution
 
mokuleCommented:
1.
Why not using static rams? Back to ancient history?
2.
I know it is not exactly what are You looking for, but You've got schematics and source code for interfacing serial spi eeproms to 68hc11
http://ww1.microchip.com/downloads/en/AppNotes/00646c.pdf
http://www.eetasia.com/ARTICLES/2001JUN/2001JUN11_MEM_MPR_AN1.PDF
0
 
ransulaAuthor Commented:
mokule,
it's a problem that i've been given.
i wouldn't torture myself that way if i had the choice :)

-r
0
 
ransulaAuthor Commented:
mokule,
u wouldn't know of any program that will convert a .asm prog to .c
do u?

i know the reverse is possible ...
-r
0
 
mokuleCommented:
Unforyunately I don't know of such a program.
Moreover I can't see any sense in it, unless You have been given such task :)
0
 
ransulaAuthor Commented:
no, i know of the reverse ... so i thought i ask
-r
0

Featured Post

Sign your company up to try the MB 660 headset now

Take control and stay focused in noisy open office environments with the MB 660. By reducing background noise, you can revitalize your office and improve concentration.

  • 3
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now