W948D6FBHX5E-TR Datasheet, PDF (30/60 Pages) Winbond – 256Mb Mobile LPDDR

W948D6FB / W948D2FB
7.5.5 Consecutive Read Bursts
256Mb Mobile LPDDR
CK
CK
Command
READ
NOP
READ
NOP
NOP
NOP
Address BA,Coln
DQS
CL=2
BA,Colb
DQ
DQS
DO n
CL=3
DO b
DQ
DO n
DO b
1) DO n (or b)=Data Out from column n (or column b)
= Don't Care
2) Burst Length=4,8 or 16 (if 4, the bursts are concatenated; if 8 or 16, the second burst interrupts the first)
3) Read bursts are to an active row in the bank
4) Shown with nominal tAC, tDQSCK and tDQSQ
7.5.6 Non-Consecutive Read Bursts
A READ command can be initiated on any clock cycle following a previous READ command. Non-consecutive
Reads are shown in following figure.
CK
CK
Command
READ
NOP
NOP
READ
NOP
NOP
Address BA,Col n
DQS
CL=2
BA,Col b
DQ
DO n
CL=3
DQS
DO b
DQ
DO n
1) DO n (or b) =Data Out from column n (or column b)
= Don't Care
2) BA,Col n (or b) =Bank A,Column n (or column b)
3) Burst Length=4; 3 subsequent elements of Data Out appear in the programmed order following DO n (or b)
4) Shown with nominal tAC, tDQSCK and tDQSQ
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Publication Release Date : Oct, 15, 2012
Revision : A01-004