Fig u re 72: No n co n se cu t ive READ Bu rst s
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
T14
T15
T16
T17
CK#
CK
Command
READ
NOP
NOP
NOP
NOP
READ
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
Bank a,
Bank a,
Address
Col n
Col b
CL = 8
CL = 8
DQS, DQS#
DO
DO
DQ
n
b
Transitioning Data
Don’t Care
Notes: 1. AL = 0, RL = 8.
2. DO n (or b) = data-out from column n (or column b).
3. Seven subsequent elements of data-out appear in the programmed order following DO n.
4. Seven subsequent elements of data-out appear in the programmed order following DO b.
Fig u re 73: READ (BL8) t o WRITE (BL8)
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
T14
T15
CK#
CK
1
READ
NOP
NOP
NOP
NOP
NOP
WRITE
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
Command
t
WR
t
t
t
BL = 4 clocks
READ-to-WRITE command delay = RL + CCD + 2 CK - WL
t
WTR
Bank,
Bank,
2
Address
Col n
Col b
t
t
t
WPRE
t
RPRE
RPST
WPST
DQS, DQS#
DO
DO
n + 1
DO
DO
n + 3
DO
DO
n + 5
DO
DO
DI
DI
DI
DI
DI
DI
DI
DI
n + 7
3
DQ
n
n + 2
n + 4
n + 6
n + 7
n
n + 1
n + 2 n + 3
n + 4
n + 5
n + 6
RL = 5
WL = 5
Transitioning Data
Don’t Care
Notes: 1. NOP commands are shown for ease of illustration; other commands may be valid at these times.
2. The BL8 setting is activated by either MR0[1:0] = 00 or MR0[1:0] = 01 and A12 = 1 during the READ command at T0, and
the WRITE command at T6.
3. DO n = data-out from column, DI b = data-in for column b.
4. BL8, RL = 5 (AL = 0, CL = 5), WL = 5 (AL = 0, CWL = 5).
MDTIC [ Micon Design Technology Corporation ]
