Hynix HMT351U7CFR8A-PBT0 Benutzerhandbuch
Rev. 1.1 / Jul. 2013
31
Refresh parameters by device density
Notes:
1. Users should refer to the DRAM supplier data sheet and/or the DIMM SPD to determine if DDR3 SDRAM devices
support the following options or requirements referred to in this materia.
Refresh parameters by device density
Parameter
RTT_Nom Setting
512Mb
1Gb
2Gb
4Gb
8Gb
Units Notes
REF command ACT or
REF command time
tRFC
90
110
160
260
350
ns
Average periodic
refresh interval
refresh interval
tREFI
0
C
T
CASE
85
C
7.8
7.8
7.8
7.8
7.8
us
85
C
T
CASE
95
C
3.9
3.9
3.9
3.9
3.9
us
1