1GB-DDR3L-AS4C128M8D3L Datasheet, PDF (67/88 Pages) Alliance Semiconductor Corporation – internal banks for concurrent operation

1Gb DDR3L – AS4C128M8D3L
Figure 32. READ (BL8) to WRITE (BL8)
T0
T1
T2
T3
T4
T5
T6
CK#
CK
Notes 3
COMMAND
READ
NOP
Notes 4
ADDRESS
Bank,
Col n
NOP
NOP
tCCD = 5
NOP
READ
Bank,
Col b
NOP
Notes 5
DQS, DQS#
tRPRE
Notes 2
DQ
DO
n
RL = 5
T7
T8
NOP
NOP
RL = 5
T9
T10
T11
NOP
NOP
NOP
DO
b
T12
T13
T14
NOP
NOP
NOP
tRPST
NOTES:
1. BL8, RL = 5 (CL = 5, AL = 0), tCCD=5
2. DOUT n (or b) = data-out from column n (or column b)
3. NOP commands are shown for ease of illustration; other commands may be valid at these times
4. BL8 setting activated by either MR0[A1:0 = 00] or MR0[A1:0 = 01] and A12 = 1 during READ commands at T0 and T4
5. DQS-DQS# is held logic low at T9
TRANSITIONING DATA
Don't Care
Figure 33. READ (BL4) to WRITE (BL4) OTF
T0
T1
T2
T3
T4
T5
T6
T7
CK#
CK
Notes 3
COMMAND
READ
NOP
NOP
NOP
WRITE
NOP
NOP
NOP
Notes 4
ADDRESS
DQS, DQS#
Notes 2
DQ
READ to WRITE Command Delay = RL + tCCD/2 + 2tCK - WL
Bank,
Col n
Bank,
Col b
tRPRE
tRPST
RL = 5
Dout
n
Dout
n+1
Dout
n+2
Dout
n+3
WL = 5
T8
T9
T10
T11
NOP
NOP
tWPRE
NOP
NOP
4 clocks
tWPST
Din
Din
Din
Din
b
b+1
b+2
b+3
T12
T13
NOP
NOP
T14
T15
NOP
NOP
tWR
tWTR
NOTES:
1. BC4, RL = 5 (CL = 5, AL = 0), WL = 5 (CWL = 5, AL = 0)
2. DOUT n = data-out from column, DIN b = data-in from column b.
3. NOP commands are shown for ease of illustration; other commands may be valid at these times.
4. BC4 setting activated by MR0[A1:0 = 01] and A12 = 0 during READ command at T0 and WRITE command at T4.
TRANSITIONING DATA
Don't Care
Figure 34. READ (BL8) to READ (BL4) OTF
T0
T1
T2
T3
T4
T5
T6
T7
CK#
CK
Notes 3
COMMAND
READ
NOP
NOP
NOP
READ
NOP
NOP
NOP
Notes 4
ADDRESS
Bank,
Col n
tCCD
Bank,
Col b
tRPRE
DQS, DQS#
T8
T9
NOP
NOP
T10
T11
NOP
NOP
tRPST
T12
T13
NOP
NOP
Notes 2
DQ
RL = 5
Dout
n
Dout
n+1
Dout
n+2
Dout
n+3
Dout
n+4
Dout
n+5
Dout
n+6
Dout
n+7
Dout
b
Dout
b+1
Dout
b+2
Dout
b+3
RL = 5
NOTES:
1. RL = 5 (CL = 5, AL = 0)
2. DOUT n (or b) = data-out from column n (or column b).
3. NOP commands are shown for ease of illustration; other commands may be valid at these times.
4. BL8 setting activated by MR0[A1:0 = 01] and A12 = 1 during READ command at T0.
BC4 setting activated by MR0[A1:0 = 01] and A12 = 0 during READ command at T4.
TRANSITIONING DATA
T14
NOP
Don't Care
Confidential
67
Rev. 2.0
Aug. /2014