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K4Y50164UC Datasheet, PDF (30/76 Pages) Samsung semiconductor – 512Mbit XDR TM DRAM(C-die)
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K4Y50164UC
K4Y50084UC
K4Y50044UC
K4Y50024UC
XDRTM DRAM
Figure 11 : Interleaved Transactions
The effective tRC time is increased by 4 tCYCLE
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23
CFM
CFMN
RQ11..0
(ACT)
RQ11..0
(COL)
ACT
a0
tRR
ACT
b0
tRC
ACT
c0
WR
WR
WR
WR
WR
a1
a2
b1
b2
c1
ACT
d0
WR
WR
c2
d1
ACT ∆tRC
e0
ACT tCYCLE
f0
WR
WR
WR
WR
WR
d2
e1
e2
f1
f2
DQ15..0 tRCD-W tCC
DQN15..0
D(a1)
D(a2)
D(b1)
D(b2)
D(c1)
D(c2)
D(d1)
D(d2)
D(e1)
D(e1)
RQ11..0
(PRE)
tCWD
tWRP
∆tWRP PRE
tRP PRE
PRE
a3
b3
c3
RQ11..0
(ALL)
ACT WR
a0 a1
WR ACT WR
a2 b0 b1
WR ACT WR
b2 c0 c1
WR ACT WR PRE WR ACT WR PRE WR ACT WR PRE WR
c2 d0 d1 a3 d2 e0 e1 b3 e2 f0 f1 c3 f2
Ba,Bb,Bc,Bd,Be
are different
banks.
Bf = Ba
Transaction a: WR
Transaction b: WR
Transaction c: WR
Transaction d: WR
Transaction e: WR
Transaction f: WR
a0 = {Ba,Ra}
b0 = {Bb,Rb}
c0 = {Bc,Rc}
d0 = {Bd,Rd}
e0 = {Be,Re}
e0 = {Bf,Rf}
a1 = {Ba,Ca1}
b1 = {Bb,Cb1}
c1 = {Bc,Cc1}
d1 = {Bd,Cd1}
e1 = {Be,Ce1}
f1 = {Bf,Cf1}
a2 = {Ba,Ca2}
b2 = {Bb,Cb2}
c2 = {Bc,Cc2}
a2 = {Bd,Cd2}
e2 = {Be,Ce2}
f2 = {Bf,Cf2}
a3 = {Ba}
b3 = {Bb}
c3 = {Bc}
d3 = {Bd}
e3 = {Be}
f3 = {Bf}
Interleaved Page-empty Write Example
CFM
CFMN
RQ11..0
(ACT)
RQ11..0
(COL)
DQ15..0
DQN15..0
RQ11..0
(PRE)
RQ11..0
(ALL)
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
a0
ACT
a0
ACT
tRC
b0
ACT
c0
ACT
d0
ACT
e0
ACT tCYCLE
f0
tRR
tRCD-R
RD
RD
RD
RD
RD
RD
RD
RD
RD
RD
a1
a2
b1
b2
c1
c2
d1
d2
e1
e2
tCAC
Q(a1)
Q(a2)
Q(b1)
Q(b2)
Q(c1)
Q(c2)
tCC
tRDP PRE
tRP PRE
PRE
PRE
a3
b3
c3
d3
ACT RD
b0 a1
RD ACT RD PRE RD ACT RD PRE RD ACT RD PRE RD ACT RD PRE RD
a2 c0 b1 a3 b2 d0 c1 b3 c2 e0 d1 c3 d2 f0 e1 d3 e2
Ba,Bb,Bc,Bd are
different banks.
Be = Ba
Transaction a: RD
Transaction b: RD
Transaction c: RD
Transaction d: RD
Transaction e: RD
a0 = {Ba,Ra}
b0 = {Bb,Rb}
c0 = {Bc,Rc}
d0 = {Bd,Rd}
e0 = {Be,Re}
a1 = {Ba,Ca1}
b1 = {Bb,Cb1}
c1 = {Bc,Cc1}
d1 = {Bd,Cd1}
e1 = {Be,Ce1}
a2 = {Ba,Ca2}
b2 = {Bb,Cb2}
c2 = {Bc,Cc2}
a2 = {Bd,Cd2}
e2 = {Be,Ce2}
a3 = {Ba}
b3 = {Bb}
c3 = {Bc}
d3 = {Bd}
e3 = {Be}
Interleaved Page-empty Read Example
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Rev. 1.1 August 2006
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