Datasheet
DON'T CARE
NOTE 1. BL = 8/BC = 4, AL = 0, CWL = 9, Preamble = 1t
CK
, t
CCD_S/L
= 5
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 either MR0[A1:0 = 00] or MR0[A1:0 = 01] and A12 = 1 during WRITE command at T0 and T5.
NOTE 5. BC4 setting activated by MR0[A1:A0 = 0:1] and A12 = 0 during WRITE command at T0 and T5.
NOTE 6. C/A Parity = Disable, CS to C/A Latency = Disable, Write DBI = Disable, Write CRC = Enable.
NOTE 7. The write recovery time (t
WR
) and write timing parameter (t
WTR
) are referenced from the first rising clock edge after the last write data shown at T18
T0 T1 T5 T8 T9 T10 T11 T12
T13
T14
TRANSITIONING DATA
CK#
CK
DQ
CMD
T15
DESWRITE WRITE DES DES DES DES DES DES DES DES
DES
ADDR
DES
T16 T17
DES
DES
T18 T19
DES
T20
DQ
WL = AL + CWL = 9
Bank
Col b
Bank
Col n
BG a or
BG b
BG a
Bank Group
ADDR
DQS, DQS#
t
WR
4 Clocks
t
WTR
BL = 8
BC = 4 (OTF)
Din
n
Din
n+1
Din
n+2
Din
n+7
Din
n+3
Din
n+4
Din
n+5
Din
n+6
Din
b
Din
b+1
Din
b+2
CRC
Din
b+3
Din
b+4
Din
b+5
Din
b+6
Din
b+7
Din
n
Din
n+1
Din
n+2
Din
n+3
Din
b
Din
b+1
Din
b+2
Din
b+3
t
WPRE
t
WPST
t
CCD_S/L = 5
CRC
CRC CRC
Figure 149. Consecutive WRITE (BL8/BC4) OTF with 1t
CK
Preamble and Write CRC in Same or Different
Bank Group
DON'T CARE
NOTE 1. BL = 8, AL = 0, CWL = 9, Preamble = 1t
CK
, t
CCD_S/L
= 5
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. BC4 setting activated by MR0[A1:A0 = 1:0] at T0 and T5.
NOTE 5. CA Parity = Disable, CS to CA Latency = Disable, Write DBI = Disable, Write CRC = Enable.
NOTE 6. The write recovery time (t
WR
) and write timing parameter (t
WTR
) are referenced from the first rising clock edge after the last write data shown at T16.
T0 T1 T5 T8 T9 T10 T11 T12
T13
T14
TRANSITIONING DATA
CK#
CK
DQ
CMD
T15
DESWRITE WRITE DES DES DES DES DES DES DES DES
DES
ADDR
DES
T16 T17
DES
DES
T18 T19
DES
T20
WL = AL + CWL = 9
Bank
Col b
Bank
Col n
BA a or
BG b
BG a
Bank Group
ADDR
DQS, DQS#
t
WR
2 Clocks
t
WTR
Din
n
Din
n+1
Din
n+2
Din
n+3
Din
b
Din
b+1
Din
b+2
Din
b+3
t
WPRE
t
WPST
t
CCD_S/L = 5
BC = 4 (fixed)
WL = PL + AL + CWL = 13
CRC
CRC
Figure 150. Consecutive WRITE (BC4) Fixed with 1t
CK
Preamble and Write CRC in Same or Different
Bank Group
AS4C256M16D4
Confidential
- 125 of 201 -
Rev.1.0 Aug.2019