L9D125G80BG4 Datasheet, PDF (27/45 Pages) LOGIC Devices Incorporated – 2.5 Gb, DDR - SDRAM Integrated Module

AC SWITCHING DIAGRAMS
Figure 10 - Nonconsecutive Read Burst
preliminary Information L9D125G80BG4
2.5 Gb, DDR - SDRAM Integrated Module (IMOD)
CK#
CK
Comman d
Add ress
DQS
DQ
CK#
CK
Comman d
Add ress
T0
READ
Bank,
Col n
T0
READ
Bank,
Col n
DQS
T1
T2 T2n T3 T3n T4
NOP
NOP
READ
NOP
CL = 2
Bank,
Col b
DO
n
T1
T2 T2n T3 T3n T4
NOP
NOP
READ
NOP
CL = 2.5
Bank,
Col b
T5 T5n T6
NOP
NOP
DO
b
T5 T5n T6
NOP
NOP
DQ
CK#
CK
Comman d
Add ress
T0
READ
Bank,
Col n
DQS
T1
T2
NOP
NOP
CL = 3
DO
n
T3 T3n T4 T4n T5
READ
Bank,
Col b
NOP
NOP
DO
b
T6
NOP
DQ
DO
DO
n
b
Transitioning Data
Don ’t Care
Notes:
1. DO n (or b) = data-out from column n (or column b).
2. BL = 4 or BL = 8 (if BL = 4, the bursts are concatenated; if BL = 8, the second burst interrupts
the first).
3. Three subsequent elements of data-out appear in the programmed order following DO n.
4. Three (or seven) subsequent elements of data-out appear in the programmed order follow-
ing DO b.
5. Shown with nominal ^tAC, ^tDQSCK, and ^tDQSQ.
LOGIC Devices Incorporated
www.logicdevices.com
27
High Performance, Integrated Memory Module Product
Feb 2, 2009 LDS-L9D125G80BG4-C