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