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 72: REFRESH Command-to-Power-Down Entry<br />
CK#<br />
CK<br />
Command<br />
CKE<br />
T0 T1<br />
Valid REFRESH<br />
1 x t CK<br />
T2 T3<br />
NOP<br />
Power-down 1<br />
entry<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 />
REFRESH command. Precharge power-down entry occurs prior to t RFC (MIN) being satisfied.<br />
Figure 73: ACTIVATE Command-to-Power-Down Entry<br />
CK#<br />
CK<br />
Command<br />
Address<br />
CKE<br />
T0 T1<br />
Valid ACT<br />
VALID<br />
<strong>1Gb</strong>: <strong>x8</strong>, <strong>x16</strong> <strong>Automotive</strong> <strong>DDR2</strong> <strong>SDRAM</strong><br />
Power-Down Mode<br />
1 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 active power-down entry may occur is at T2, which is 1 × t CK after the ACTI-<br />
VATE command. Active power-down entry occurs prior to t RCD (MIN) being satisfied.<br />
PDF: 09005aef840eff89<br />
1gbddr2_ait_aat.pdf – Rev. C 7/11 EN 118 <strong>Micron</strong> Technology, Inc. reserves the right to change products or specifications without notice.<br />
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