K4S161622E Datasheet, PDF (36/42 Pages) Samsung semiconductor – 1M x 16 SDRAM

K4S161622E
CMOS SDRAM
Read Interrupted by Precharge Command & Read Burst Stop Cycle @Burst Length=Full page
CLOCK
CKE
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
HIGH
CS
RAS
CAS
ADDR
RAa
CAa
CAb
BA
A10/AP
RAa
DQ CL=2
CL=3
1
QAa0 QAa1 QAa2 QAa3 QAa4
*Note 2
2
QAa0 QAa1 QAa2 QAa3 QAa4
1
QAb0 QAb1 QAb2 QAb3 QAb4 QAb5
2
QAb0 QAb1 QAb2 QAb3 QAb4 QAb5
WE
DQM
Row Active
(A-Bank)
Read
(A-Bank)
Burst Stop Read
(A-Bank)
Precharge
(A-Bank)
: Don't care
*Note :
1. At full page mode, burst is wrap-around at the end of burst. So auto precharge is impossible.
2. About the valid DQs after burst stop, it is same as the case of RAS interrupt.
Both cases are illustrated above timing diagram. See the label 0. 1, 2 on them.
But at burst write, Burst stop and RAS interrupt should be compared carefully.
Refer the timing diagram of "Full page write burst stop cycle".
3. Burst stop is valid at every burst length.
Rev 0.2 Oct. '02