Datasheet
DON'T CARE
NOTE 1. BL = 8, RL = 20 (CL = 11 , AL = CL- 2 ), Preamble = 1t
CK
, tRTP = 6, t
RP
= 11
NOTE 2. Dout n = data-out from column n.
NOTE 3. DES commands are shown for ease of illustration; other commands may be valid at these times.
NOTE 4. t
RTP
= 6 setting activated by MR0[A11:9 = 001]
NOTE 5. The example assumes tRC. MIN is satisfied at the next Active command time(T27).
NOTE 6. CA Parity = Disable, CS to CA Latency = Disable, Read DBI = Disable.
T0 T1 T2 T9 T10 T11 T12 T16
T19
T20
TRANSITIONING DATA
Dout
n
Dout
n+1
Dout
n+2
AL = CL – 2 = 9
CK#
CK
DQ
CMD
T21
RDADES DES DES DES DES DES DES DES DES DES
DES
Bank a
Col n
ADDR
DES
T22 T23
DES
DES
T24 T25
Dout
n+3
t
RP
t
RTP
ACT
T27
Dout
n
Dout
n+1
Dout
n+2
DQ
Dout
n+7
Dout
n+3
Dout
n+4
Dout
n+5
Dout
n+6
DQS, DQS#
DQS, DQS#
Bank a
Row b
BC4 Operation:
BC8 Operation:
CL = 11
Figure 115. READ with Auto Precharge, Additive Latency and 1t
CK
Preamble
Burst Read Operation with Read DBI (Data Bus Inversion)
DON'T CARE
NOTE 1. BL = 8, AL = 0, CL = 11, Preamble = 1t
CK
, tDBI = 2t
CK
NOTE 2. Dout n (or b) = data-out from 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:A0 = 00] or MR0[A1:A0 = 0:1] and A12 = 1 during READ command at T0 and T4.
NOTE 5. CA Parity = Disable, CS to CA Latency = Disable, Read DBI = Enable.
T0 T1 T2 T4 T11 T12 T13 T14
T15
T16
TRANSITIONING DATA
RL = 11
CK#
CK
DQ
CMD
T17
DESREAD DES READ DES DES DES DES DES DES DES
DES
ADDR
DES
T18 T19
DES
DES
T20 T21
t
DBI = 2
t
RPRE
DES
T22
DBI
BG a BG b
t
CCD_S = 4
Bank Group
ADDR
Bank
Col n
Bank
Col b
DQS, DQS#
Dout
n
Dout
n+1
Dout
n+2
Dout
b+7
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
Dout
b+4
Dout
b+5
Dout
b+6
DBI
n
DBI
n+1
DBI
n+2
DBI
b+7
DBI
n+3
DBI
n+4
DBI
n+5
DBI
n+6
DBI
n+7
DBI
b
DBI
b+1
DBI
b+2
DBI
b+3
DBI
b+4
DBI
b+5
DBI
b+6
RL = 11
t
DBI = 2
t
RPST
Figure 116. Consecutive READ (BL8) with 1t
CK
Preamble and DBI in Different Bank Group
AS4C256M16D4
Confidential
- 107 of 201 -
Rev.1.0 Aug.2019