HY5S2B6DLF-SE Datasheet, PDF (25/26 Pages) Hynix Semiconductor – 4Banks x 2M x 16bits Synchronous DRAM

1HY5S2B6DLF(P)-xE
4Banks x 2M x 16bits Synchronous DRAM
Deep Power Down Mode (Continued)
Deep Power Down Mode Exit Sequence
The Deep Power Down mode is exited by asserting CKE high.
After the exit, the following sequence is needed to enter a new command.
1. Maintain NOP input conditions for a minimum of 200usec
2. Issue precharge commands for all banks of the device
3. Issue 8 or more auto refresh commands
4. Issue a mode register set command to initialize the mode register
5. Issue an extended mode register set command to initialize the extended mode register
The following timing diagram illustrates deep power down mode exit sequence.
CLK
CKE
CS
RAS
CAS
WE
200µs
tRP
Deep Power Down All Banks Auto
exit
Precharge refresh
tRC
Auto
refresh
Mode
Register
Set
Extended New
Mode Command
Register Accepted
Set
Here
Rev. 0.3 / Feb. 2005
25