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| K4Y50164UC Datasheet, PDF (24/76 Pages) Samsung semiconductor – 512Mbit XDR TM DRAM(C-die) | |||
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K4Y50164UC
K4Y50084UC
K4Y50044UC
K4Y50024UC
XDRTM DRAM
Figure 8 : Request Scheduling Examples
CFM
CFMN
RQ11..0
ACT w/DEL=1 at T0 is equivalent
to ACT w/DEL=0 at T1
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23
ACT ACT
DEL1 DEL0
tCYCLE
DQ15..0
DQN15..0
Note DEL value is specified by DELA field.
ROWA/ACT Command
CFM
CFMN
RQ11..0
RD w/DEL=1 at T0 is equivalent
to RD w/DEL=0 at T1
WR w/DEL=1 at T12 is equivalent
to WR w/DEL=0 at T13
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23
RD RD
DEL1 DEL0
WR WR
DEL1 DEL0
tCYCLE
DQ15..0
DQN15..0
Q
tCAC
Note DEL value is specified by DELC field.
D
tCWD
COL/RD and COL/WR Commands
CFM
CFMN
RQ11..0
PRE w/DEL=3 at T0 is equivalent to PRE w/DEL
=2 at T1 or PRE w/DEL=1 at T2 or PRE w/DEL=0 at T3
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23
PRE PRE PRE PRE
DEL3 DEL2 DEL1 DEL0
tCYCLE
DQ15..0
DQN15..0
Note DEL value is specified by {POP1, POP0} field.
ROWP/PRE Command
CFM
CFMN
RQ11..0
REFP w/DEL=3 at T0 is equivalent to REFP w/DEL=2
at T1 or REFP w/DEL=1 at T2 or REFP w/DEL=0 at T3
REFI w/DEL=3 at T13 is equivalent to REFI w/DEL=2
at T14 or REFI w/DEL=1 at T15 or REFI w/DEL=0 at T16
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23
REFP REFP REFP REFP
DEL3 DEL2 DEL1 DEL0
REFA REFA REFA REFA
DEL3 DEL2 DEL1 DEL0
REFI REFI REFI REFI
DEL3 DEL2 DEL1 DEL0
tCYCLE
DQ15..0
DQN15..0
REFA w/DEL=3 at T6 is equivalent to REFA w/DEL=2
at T7 or REFA w/DEL=1 at T8 or REFA w/DEL=0 at T9
Note DEL value is specified by {RA7, RA6} field.
ROWP/REFP,REFA,REFI Commands
24 of 76
Rev. 1.1 August 2006
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