is42s16160a1-7t Integrated Silicon Solution, Inc., is42s16160a1-7t Datasheet - Page 27

• Manufacturer Part Number: is42s16160a1-7t
• Description: 256 Mb Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

IS42S83200A1
IS42S16160A1
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. B
10/28/05
CLK SUSPEND
CKE controls the internal CLK at the following cycle.
Figure below shows how CKE works. By negating CKE,
the next internal CLK is suspended. The purpose of
CLK suspend is power down, output suspend or input
Command
Command
Command
CLK
CKE
CKE
CLK
CKE
DQ
Write
(4-bank x 8,388,608 - word x 8-bit)
(4-bank x 4,194,304 - word x 16-bit)
PRE
ACT
ext.CLK
D0
int.CLK
CKE
NOP NOP NOP
NOP NOP NOP
D1
tIH
Power Down by CKE
D2
DQ Suspend by CKE
tIS
D3
tIH
suspend. CKE is a synchronous input except during
the self-refresh mode. CLK suspend can be performed
either when the banks are active or idle. A command
at the suspended cycle is ignored.
tIS
Standby Power Down
Active Power Down
Read
Q0
Q1
Q2
Q3
ISSI
27
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