is42s16160a1-7t Integrated Silicon Solution, Inc., is42s16160a1-7t Datasheet - Page 26

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

IS42S83200A1
IS42S16160A1
26
SELF REFRESH
Self-refresh mode is entered by issuing a REFS
command (/CS= /RAS= /CAS= L, /WE= H, CKE= L).
Once the self-refresh is initiated, it is maintained as
long as CKE is kept low. During the self-refresh mode,
CKE is asynchronous and the only enabled input .
All other inputs including CLK are disabled and
ignored, so that power consumption due to synchro­
A0-12
B A0-1
/RAS
/CAS
CKE
CLK
/WE
/CS
Self Refresh Entry
(4-bank x 8,388,608 - word x 8-bit)
(4-bank x 4,194,304 - word x 16-bit)
Self-Refresh
nous inputs is saved. To exit the self-refresh, supply­
ing stable CLK inputs, asserting DESEL or NOP com­
mand and then asserting CKE=H. After tRFC from the
1st CLK egde following CKE=H, all banks are in the
idle state and a new command can be issued, but
DESEL or NOP commands must be asserted till then.
Stable CLK
Integrated Silicon Solution, Inc. — 1-800-379-4774
Self Refresh Exit
NOP
minimum tRFC
for recovery
new command
00
X
ISSI
10/28/05
Rev. B
®