k4s643232c Samsung Semiconductor, Inc., k4s643232c Datasheet - Page 40

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

CLOCK
K4S643232C
Active/Precharge Power Down Mode @CAS Latency=2, Burst Length=4
A
ADDR
10
DQM
CKE
RAS
CAS
/AP
WE
DQ
CS
BA
*Note :
0
Power-down
1
Precharge
1. Both banks should be in idle state prior to entering precharge power down mode.
2. CKE should be set high at least 1CLK + tss prior to Row active command.
3. Can not violate minimum refresh specification. (64ms)
Entry
tSS
*Note 1
2
*Note 3
3
4
*Note 2
Power-down
Precharge
5
Exit
6
Row Active
Ra
Ra
7
Power-down
tSS
Active
Entry
8
9
- 40
tSS
Power-down
10
Active
Exit
*Note 2
11
Read
Ca
12
13
Qa0
14
Precharge
Qa1
15
tSHZ
REV. 1.1 Nov. '99
Qa2
CMOS SDRAM
16
17
18
: Don
19
¡Ç
t Care