Hardware
/
litedram
mirror of https://github.com/enjoy-digital/litedram.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #73 from softerhardware/master 

Additional DDR3 and DDR4 SDRAMModules
This commit is contained in:
enjoy-digital 2019-01-26 15:06:37 +01:00 committed by GitHub
parent 92df55f234 8e6ad4cc75
commit 6d09a47103
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 33 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
litedram/modules.py
View File

@ -339,6 +339,22 @@ class AS4C256M16D3A(SDRAMModule):
speedgrade_timings["default"] = speedgrade_timings["1600"]
class MT16KTF1G64HZ(SDRAMModule):
memtype = "DDR3"
# geometry
nbanks = 8
nrows = 65536
ncols = 1024
# timings
technology_timings = _TechnologyTimings(tREFI=64e6/8192, tWTR=(4, 7.5), tCCD=(4, None), tRRD=(4, 10))
speedgrade_timings = {
"800" : _SpeedgradeTimings(tRP=15, tRCD=15, tWR=15, tRFC=140, tFAW=(None, 40), tRAS=None),
"1066": _SpeedgradeTimings(tRP=15, tRCD=15, tWR=15, tRFC=187, tFAW=(None, 40), tRAS=None),
"1333": _SpeedgradeTimings(tRP=15, tRCD=15, tWR=15, tRFC=234, tFAW=(None, 30), tRAS=None),
"1600": _SpeedgradeTimings(tRP=13.125, tRCD=13.125, tWR=13.125, tRFC=280, tFAW=(None, 30), tRAS=None),
}
speedgrade_timings["default"] = speedgrade_timings["1600"]
# DDR4 (Chips)
class EDY4016A(SDRAMModule):
memtype = "DDR4"
@ -366,6 +382,23 @@ class MT40A1G8(SDRAMModule):
ncols = 1024
# timings
technology_timings = _TechnologyTimings(tREFI=64e6/8192, tWTR=(4, 7.5), tCCD=(4, None), tRRD=(4, 4.9))
speedgrade_timings = {
"1333": _SpeedgradeTimings(tRP=15, tRCD=15, tWR=15, tRFC=219, tFAW=(20, 25), tRAS=32),
"2400": _SpeedgradeTimings(tRP=13.32, tRCD=13.32, tWR=15, tRFC=350, tFAW=(20, 25), tRAS=32),
}
speedgrade_timings["default"] = speedgrade_timings["1333"]
class MT40A512M16(SDRAMModule):
memtype = "DDR4"
# geometry
ngroupbanks = 4
ngroups = 2
nbanks = ngroups * ngroupbanks
nrows = 65536
ncols = 1024
# timings
technology_timings = _TechnologyTimings(tREFI=64e6/8192, tWTR=(4, 7.5), tCCD=(4, None), tRRD=(4, 4.9))
speedgrade_timings = {
"2400": _SpeedgradeTimings(tRP=13.32, tRCD=13.32, tWR=15, tRFC=350, tFAW=(20, 25), tRAS=32),
}