is42g32256 ETC-unknow, is42g32256 Datasheet - Page 20

• Manufacturer Part Number: is42g32256
• Description: 256k 16-mbit Synchronous Graphics
• Manufacturer: ETC-unknow

IS42G32256
20
CMD
CMD
CLK
CKE
CLK
CKE
Notes:
1. Active power down: one or more banks active state.
2. Precharge power down: both banks precharge state.
3. The Auto Refresh is the same as CBR refresh of conventional DRAM. No precharge commands are required
4. Before excuting auto/self refresh command, both banks must be idle state.
5. (S)MRS, Bank Active, Auto/Self Refresh, Power Down Mode Entry.
6. During self refresh mode, refresh interval and refresh operation are performed internally. After self refresh
after Auto Refresh command. During t
accepted.
entry, self refresh mode is kept while CKE is low.
During self refresh mode, all inputs except CKE will be “Don’t Care”, and outputs will be in Hi-Z state.
During t
Before/after self refresh mode, burst auto refresh (2K cycles) is recommended.
1. AUTO REFRESH (NOTE 3)
2. SELF REFRESH (NOTE 6)
RC
PRE
PRE
from self refresh exit command, any other comman can not be accepted.
(NOTE 4)
(NOTE 4)
t
t
RP
RP
Figure 14. Auto Refresh and Self Refresh
RC
AR
SR
from Auto Refresh command, any other command can not be
t
RC
t
RC
Integrated Silicon Solution, Inc.
CMD
(NOTE 5)
ADVANCE INFORMATION SR037-0C
CMD
ISSI
09/10/98
®