1Gb: x8, x16 Automotive DDR2 SDRAM - Micron
1Gb: x8, x16 Automotive DDR2 SDRAM - Micron
1Gb: x8, x16 Automotive DDR2 SDRAM - Micron
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Figure 74: PRECHARGE Command-to-Power-Down Entry<br />
CK#<br />
CK<br />
Command<br />
Address<br />
A10<br />
CKE<br />
T0 T1<br />
Valid PRE<br />
Valid<br />
All banks<br />
vs<br />
Single bank<br />
1 x t CK<br />
T2<br />
NOP<br />
Power-down 1<br />
entry<br />
T3<br />
t CKE (MIN)<br />
Don’t Care<br />
Note: 1. The earliest precharge power-down entry may occur is at T2, which is 1 × t CK after the<br />
PRECHARGE command. Precharge power-down entry occurs prior to t RP (MIN) being satisfied.<br />
Figure 75: LOAD MODE Command-to-Power-Down Entry<br />
CK#<br />
CK<br />
Command<br />
T0 T1<br />
Valid LM<br />
Address Valid 1<br />
CKE<br />
t RP 2<br />
<strong>1Gb</strong>: <strong>x8</strong>, <strong>x16</strong> <strong>Automotive</strong> <strong>DDR2</strong> <strong>SDRAM</strong><br />
Power-Down Mode<br />
T2<br />
NOP<br />
t MRD<br />
T3 T4<br />
NOP<br />
Power-down 3<br />
entry<br />
t CKE (MIN)<br />
Don’t Care<br />
Notes: 1. Valid address for LM command includes MR, EMR, EMR(2), and EMR(3) registers.<br />
2. All banks must be in the precharged state and t RP met prior to issuing LM command.<br />
3. The earliest precharge power-down entry is at T3, which is after t MRD is satisfied.<br />
PDF: 09005aef840eff89<br />
1gbddr2_ait_aat.pdf – Rev. C 7/11 EN 119 <strong>Micron</strong> Technology, Inc. reserves the right to change products or specifications without notice.<br />
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