W949D6CB Datasheet, PDF (11/60 Pages) Winbond – 512Mb Mobile LPDDR

6.1.1 Initialization Flow Diagram
W949D6CB / W949D2CB
512Mb Mobile LPDDR
1 VDD and VDDQ Ramp: CKE must be held high
2 Apply stable clocks
3 Wait at least 200us with NOP or DESELECT on command bus
4 PRECHARGE ALL
5 Assert NOP or DESELCT for tRP time
Issue two AUTO REFRESH commands each followed by
6
NOP or DESELECT commands for tRFC time
7 Configure Mode Register
8 Assert NOP or DESELECT for tMRD time
9 Configure Extended Mode Register
10 Assert NOP or DESELECT for tMRD time
11 LPDDR SDRAM is ready for any valid command
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Publication Release Date: Sep, 21, 2011
Revision A01-007