1GB-AUTO-AS4C128M8D3 Datasheet, PDF (64/84 Pages) Alliance Semiconductor Corporation – Fully synchronous operation

1Gb Auto-AS4C128M8D3
Figure 32. READ (BL8) to WRITE (BL8)
T0
T1
CK#
CK
Notes 3
COMMAND
READ
NOP
Notes 4
ADDRESS
Bank,
Col n
Notes 5
DQS, DQS#
Notes 2
DQ
T2
T3
NOP
NOP
tCCD = 5
RL = 5
T4
T5
T6
NOP
READ
Bank,
Col b
tRPRE
NOP
DO
n
T7
T8
NOP
NOP
RL = 5
T9
T10
T11
T12
T13
T14
NOP
NOP
NOP
NOP
NOP
NOP
tRPST
DO
b
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
CK#
CK
Notes 3
COMMAND
READ
NOP
T2
T3
T4
T5
T6
T7
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
CK#
CK
Notes 3
COMMAND
Notes 4
ADDRESS
DQS, DQS#
Notes 2
DQ
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
READ
NOP
Bank,
Col n
NOP
tCCD
NOP
READ
NOP
Bank,
Col b
tRPRE
NOP
NOP
NOP
NOP
NOP
NOP
tRPST
NOP
NOP
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
-64-
Rev.1.0 May 2015