W948D6FBHX5E-TR Datasheet, PDF (20/60 Pages) Winbond – 256Mb Mobile LPDDR

W948D6FB / W948D2FB
6.11.2 Truth Table - Commands
NAME (FUNCTION)
DESELECT (NOP)
NO OPERATION (NOP)
ACTIVE (Select Bank and activate row)
READ (Select bank and column and start read burst)
READ with AP (Read Burst with Auto Precharge)
WRITE (Select bank and column and start write burst)
WRITE with AP (Write Burst with Auto Precharge)
BURST TERMINATE or enter DEEP POWER DOWN
PRECHARGE (Deactivate Row in selected bank)
PRECHARGE ALL (Deactivate rows in all banks)
AUTO REFRESH or enter SELF REFRESH
MODE REGISTER SET
256Mb Mobile LPDDR
CS RAS CAS WE
HX X X
L H HH
L L HH
LHLH
LHLH
LHL L
LHL L
LHHL
LLHL
LLHL
LL LH
LLLL
BA
X
X
Valid
Valid
Valid
Valid
Valid
X
Valid
X
X
Valid
A10/AP ADDR NOTES
X
X
2
X
X
2
Row Row
L
Col
H
Col
3
L
Col
H
Col
3
X
X 4, 5
L
X
6
H
X
6
X
X 7, 8, 9
Op-code
10
Notes:
1. All states and sequences not shown are illegal or reserved.
2. DESELECT and NOP are functionally interchangeable.
3. Auto precharge is non-persistent. A10 High enables Auto precharge, while A10 Low disables Auto precharge.
4. Burst Terminate applies to only Read bursts with Autoprecharge disabled. This command is undefined and should not be
used for Read with Auto precharge enabled, and for Write bursts.
5. This command is BURST TERMINATE if CKE is High and DEEP POWER DOWN entry if CKE is Low.
6. If A10 is low, bank address determines which bank is to be precharged. If A10 is high, all banks are precharged and
BA0~BA1 are don‟t care.
7. This command is AUTO REFRESH if CKE is High and SELF REFRESH if CKE is low.
8. All address inputs and I/O are „don‟t care‟ except for CKE. Internal refresh counters control bank and row addressing.
9. All banks must be precharged before issuing an AUTO-REFRESH or SELF REFRESH command.
10. BA0 and BA1 value select between MRS and EMRS.
11. CKE is HIGH for all commands shown except SELF REFRESH and DEEP POWER-DOWN.
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Publication Release Date : Oct, 15, 2012
Revision : A01-004