AS4C256M16D3A-12BAN Datasheet, PDF (70/83 Pages) Alliance Semiconductor Corporation – Fully synchronous operation

AS4C256M16D3A-12BAN
Figure 49. WRITE(BC4) to READ(BC4,BC8) OTF
T0
T1
T2
T3
T4
T5
T6
T7
T8
CK#
CK
Notes 3
COMMAND
WRITE
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
4 Clocks
Notes 4
ADDRESS
Bank
Col n
DQS, DQS#
Notes 2
DQ
WL = 5
tWPRE
tWPST
Din
Din
Din
Din
n
n+1
n+2
n+3
NOTES:
1. RL = 5 (CL = 5, AL = 0), WL = 5 (CWL =5, AL = 0)
2. DIN n = data-in from column n; DOUT b = data-out 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 WRITE command at T0.
READ command at T13 can be either BC4 or BL8 depending on A12 status at T13.
T9
NOP
T10
T11
T12
T13
T14
NOP
NOP
tWTR
NOP
READ
NOP
Bank
Col b
RL = 5
TRANSITIONING DATA
Don't Care
Figure 50. WRITE(BC4) to READ(BC4)
T0
T1
T2
T3
T4
T5
T6
T7
CK#
CK
Notes 3
COMMAND
WRITE
NOP
NOP
NOP
NOP
NOP
NOP
NOP
Notes 4
ADDRESS
Bank
Col n
DQS, DQS#
Notes 2
DQ
WL = 5
tWPRE
tWPST
Din
Din
Din
Din
n
n+1
n+2
n+3
NOTES:
1. RL = 5 (CL = 5, AL = 0), WL = 5 (CWL =5, AL = 0)
2. DIN n = data-in from column n; DOUT b = data-out 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 = 10].
T8
T9
NOP
NOP
tWTR
T10
T11
T12
T13
T14
NOP
READ
NOP
NOP
NOP
Bank
Col b
RL = 5
TRANSITIONING DATA
Don't Care
Figure 51. WRITE(BC8) to WRITE(BC4) OTF
T0
T1
T2
T3
T4
T5
T6
T7
CK#
CK
Notes 3
COMMAND
WRITE
NOP
NOP
tCCD
NOP
WRITE
NOP
NOP
NOP
T8
T9
NOP
NOP
T10
T11
T12
T13
NOP
NOP
NOP
4 Clocks
NOP
Notes 4
ADDRESS
Bank
Col n
DQS, DQS#
Bank
Col b
tWPRE
tWPST
Notes 2
DQ
WL = 5
Din
Din
Din
Din
Din
Din
Din
Din
Din
Din
Din
Din
n
n+1
n+2
n+3
n+4
n+5
n+6
n+7
b
b+1
b+2
b+3
WL = 5
NOTES:
1. WL = 5 (CWL = 5, AL = 0)
2. DIN n (or b) = data-in 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 WRITE command at T0.
BC4 setting activated by MR0[A1:0 = 01] and A12 = 0 during WRITE command at T4.
TRANSITIONING DATA
T14
NOP
tWR
tWTR
Don't Care
Confidential
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Rev. 1.0 May 2016