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Figure 54: Bank Read – Without Auto Precharge
CK
CK#
CKE
A10
BA0, BA1
tCK
tCH
tCL
tIS tIH
Row
tRCD
tRAS6
tRC
tRP
CL = 2
DM
T0
T1
T2
T3
T4
T5
T5n
T6n
T6
T7
T8
DQ7,8
DQS7
Case 1: tAC (MIN) and tDQSCK (MIN)
Case 2: tAC (MAX) and tDQSCK (MAX)
DQ7,8
DQS7
tHZ (MAX)
NOP1
Command
ACTIVE
Row
Col n
READ2
Bank x
Row
Bank x
ACTIVE
Bank x
NOP1
Don’t Care
Transitioning Data
Address
PRE3
Bank x5
tRPRE
tAC (MAX)
All banks
One bank
DOUT
n
DOUT
n + 1
DOUT
n + 2
DOUT
n + 3
DOUT
n
DOUT
n + 1
DOUT
n + 2
DOUT
n + 3
tLZ (MIN)
tDQSCK (MIN)
tAC (MIN)
tRPST
tDQSCK (MAX)
Note 4
Notes: 1. NOP commands are shown for ease of illustration; other commands may be valid at
these times.
2. BL = 4 in the case shown.
3. PRE = PRECHARGE.
4. Disable auto precharge.
5. Bank x at T5 is “Don’t Care” if A10 is HIGH at T5.
6. The PRECHARGE command can only be applied at T5 if tRAS (MIN) is met.
8. DOUTn = data out from column n.
2Gb: x16, x32 Mobile LPDDR SDRAM
Auto Precharge
PDF: 09005aef83a73286
2gb_ddr_mobile_sdram_t69m.pdf - Rev. M 11/10 EN
95
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