k4s643232c Samsung Semiconductor, Inc., k4s643232c Datasheet - Page 37

• Manufacturer Part Number: k4s643232c
• Description: 2m X 32 Sdram 512k X 32bit X 4 Banks Synchronous Dram Lvttl
• Manufacturer: Samsung Semiconductor, Inc.

DQ
CLOCK
K4S643232C
Read Interrupted by Precharge Command & Read Burst Stop Cycle @Burst Length=Full page
A
ADDR
DQM
10
CKE
RAS
CAS
BA
BA
/AP
WE
CS
CL=2
CL=3
0
1
*Note :
0
Row Active
(A-Bank)
RAa
RAa
1
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.
3. Burst stop is valid at every burst length.
Both cases are illustrated above timing diagram. See the label 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".
2
3
(A-Bank)
Read
CAa
4
5
QAa0 QAa1 QAa2 QAa3 QAa4
6
QAa0 QAa1 QAa2 QAa3 QAa4
7
8
Burst Stop
9
- 37
HIGH
10
1
(A-Bank)
Read
CAb
11
2
12
QAb0 QAb1 QAb2 QAb3 QAb4 QAb5
13
QAb0 QAb1 QAb2 QAb3 QAb4 QAb5
14
15
REV. 1.1 Nov. '99
CMOS SDRAM
16
Precharge
(A-Bank)
17
18
1
: Don't care
19
2