14.11.2012 Views

1Gb: x8, x16 Automotive DDR2 SDRAM - Micron

1Gb: x8, x16 Automotive DDR2 SDRAM - Micron

1Gb: x8, x16 Automotive DDR2 SDRAM - Micron

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

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 />

� 2010 <strong>Micron</strong> Technology, Inc. All rights reserved.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!