Some idea about how to set the ram timings over ddr 900

Onepagebook

New member
most likely(in general situation for RAM timings under normal voltage usage) here is the setting over 900:

CL:4

Trtc: 4(or TRCD)

TRP: 3

TRAS: 4~8

RMS (only in 975x):7.8 mu-s or 15.6 mu-s

subtimings:

Page Close idle Timer: 16t

TRFC: 900~1000 for 25~30; over ddr1000~1066: 30~38

Read delay: you can try 6 first, but I am pretty sure that you need 7 for stable result in 32m calculation

write to precharge command: normally 900 can be 10 or 11, over ddr1000 you will need 11~13

write to read command: definitely 10~11

read-write turn around: 7

write read turn around: 4~5

read to precharge: 4 under dr 1000
,

hope this helps

OPB
 
Back
Top