MT16VDDF12864HY-335 查看數據表（PDF） - Micron Technology

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MT16VDDF12864HY-335

SMALL-OUTLINE DDR SDRAM DIMM

Micron Technology 

BA1 = 0) and will retain the stored information until it

is programmed again or the device loses power. The

enabling of the DLL should always be followed by a

LOAD MODE REGISTER command to the mode regis-

ter (BA0/ BA1 both LOW) to reset the DLL.

The extended mode register must be loaded when

all device banks are idle and no bursts are in progress,

and the controller must wait the specified time before

initiating any subsequent operation. Violating either of

these requirements could result in unspecified opera-

tion.

DLL Enable/Disable

The DLL must be enabled for normal operation.

DLL enable is required during power-up initialization

and upon returning to normal operation after having

disabled the DLL for the purpose of debug or evalua-

tion. (When the device exits self refresh mode, the DLL

is enabled automatically.) Any time the DLL is enabled,

200 clock cycles must occur before a READ command

can be issued.

512MB, 1GB (x64)

200-PIN DDR SODIMM

Figure 7: Extended Mode Register

Definition Diagram

BA1 BA0 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 Address Bus

14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Extended Mode

01 11

Operating Mode

DS DLL Register (Ex)

E0

DLL

0

Enable

1

Disable

E1 Drive Strength

0

Normal

1

Reduced

E13 E12 E11 E10 E9 E8 E7 E6 E5 E4 E3 E22

0 0 0 0 0 0 0 00 0 0 0

– – – – – – – –– – – –

E1, E0

Valid

–

Operating Mode

Reserved

Reserved

NOTE:

1. BA1 and BA0 (E14 and E13) must be “0, 1” to select the

Extended Mode Register (vs. the base Mode Register).

2. The QFC# option is not supported.

09005aef80a646bc

DDF16C64_128x64HG_B.fm - Rev. B 7/03 EN

11

Micron Technology, Inc., reserves the right to change products or specifications without notice.

©2003 Micron Technology, Inc.

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