D
Dan Kuechle
- Jan 1, 1970
- 0
I currently have a (single data rate) sdram design that runs at 40mhz.
Sdram is used primarily for low cost, not for speed. We want to switch over
to DDR (double data rate) because prices are getting cheaper than sdr sdram
and densities are getting higher. If anything, we would want to go to a
wider bus at 20mhz, rather than run at higher frequencies. From what I can
see about DDR, this would not be possible as there is a minimum frequency of
about 80mhz according to the spec sheets. Could someone in the "know"
verify this: that ddr sdram needs its clock to be within a fairly narrow
range... greater than 80mhz and less than its max clk speed. Any way around
this?
Thanks
Dan
Sdram is used primarily for low cost, not for speed. We want to switch over
to DDR (double data rate) because prices are getting cheaper than sdr sdram
and densities are getting higher. If anything, we would want to go to a
wider bus at 20mhz, rather than run at higher frequencies. From what I can
see about DDR, this would not be possible as there is a minimum frequency of
about 80mhz according to the spec sheets. Could someone in the "know"
verify this: that ddr sdram needs its clock to be within a fairly narrow
range... greater than 80mhz and less than its max clk speed. Any way around
this?
Thanks
Dan