Datasheet
DON'T CARE
NOTE 1. BC = 4, AL = 0, CWL = 9, CL = 11, Preamble = 1t
CK
NOTE 2. Din n = data-in to column n (or column b). Dout b = data-out from column b.
NOTE 3. DES commands are shown for ease of illustration; other commands may be valid at these times.
NOTE 4. BC4 setting activated by MR0[A1:A0 = 1:0].
NOTE 5. CA Parity = Disable, CS to CA Latency = Disable, Write DBI = Disable.
NOTE 6. The write timing parameter (t
WTR_L
) are referenced from the first rising clock edge after the last write data shown at T11.
When AL is non-zero, the external read command at T15 can be pulled in by AL.
T0 T1 T7 T8 T9 T10 T11 T12
T13
T15
TRANSITIONING DATA
CK#
CK
CMD
T16
DESWRITE DES DES DES DES DES DES DES READ DES
DES
ADDR
DES
T24 T25
DES
DES
T26 T27
DES
T28
DQ
Bank
Col b
Bank
Col n
BG bBG a
Bank Group
ADDR
DQS, DQS#
2 Clocks
t
WTR_L = 4
Din
n
Din
n+1
Din
n+2
Din
b+3
t
WPRE
t
RPST
WL = AL + CWL = 9
Din
n+3
Din
b
Din
b+1
Din
b+2
t
WPST
t
RPRE
RL = AL + CL = 11
Figure 139. WRITE (BC4)Fixed to READ (BC4)Fixed with 1t
CK
Preamble in Same Bank Group
DON'T CARE
NOTE 1. BL = 8 / BC = 4, AL = 0, CWL = 9, Preamble = 1t
CK
NOTE 2. Din n (or b) = data-in to column n (or column b).
NOTE 3. DES commands are shown for ease of illustration; other commands may be valid at these times.
NOTE 4. BL8 setting activated by MR0[A1:A0 = 0:1] and A12 =1 during WRITE command at T0. BC4 setting activated by MR0[A1:A0 = 0:1] and A12 =0 during WRITE command at T4.
NOTE 5. CA Parity = Disable, CS to CA Latency = Disable, Write DBI = Disable.
NOTE 6. The wRite recovery time (tWR) and write timing parameter (tWTR) are referenced from the first rising clock edge after the last write Data shown at T17.
T0 T1 T4 T7 T8 T9 T10 T11
T12
T13
TRANSITIONING DATA
CK#
CK
CMD
T14
DESWRITE WRITE DES DES DES DES DES DES DES DES
DES
ADDR
DES
T15 T16
DES
DES
T17 T18
DES
T19
DQ
Bank
Col b
Bank
Col n
BG bBG a
Bank Group
ADDR
DQS, DQS#
t
CCD_S = 4
t
WR
4 Clocks
t
WTR
Din
n
Din
n+1
Din
n+2
Din
n+3
Din
n+4
t
WPRE
t
WPST
WL = AL + CWL = 9
Din
n+5
Din
n+6
Din
n+7
Din
b
Din
b+1
Din
b+2
Din
b+3
WL = AL + CWL = 9
Figure 140. WRITE (BL8) to WRITE (BC4) OTF with 1t
CK
Preamble in Different Bank Group
AS4C256M16D4
Confidential
- 120 of 201 -
Rev.1.0 Aug.2019