11
1Gbit (32Mx32bit) Mobile SDR Memory
H55S1G(2/3)2MFP Series
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
200us
tRP
tRC
Extended
Mode
Register
New
Mode
Register
Set
Deep Power Down
Exit
All Banks
Precharge
Auto
Refresh
Auto
Refresh
Command
Accepted
Here
Set
Rev 1.2 / Jun. 2008
52
HYNIX [ HYNIX SEMICONDUCTOR ]
