Rev 1.0 / May 2007

16

1

HY5DU12822DF(P) / HY5DU121622DF(P)

EXTENDED MODE REGISTER SET (EMRS)

The Extended Mode Register controls functions beyond those controlled by the Mode Register; these additional func-

tions include DLL enable/disable, output driver strength selection(optional). These functions are controlled via the bits

shown below. The Extended Mode Register is programmed via the Mode Register Set command (BA0=1 and BA1=0)

and will retain the stored information until it is programmed again or the device loses power.

The Extended Mode Register must be loaded when all 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 will result

in unspecified operation.

BA1

BA0

A12

A11

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

0

1

Operating Mode

0*

DS

DLL

BA0

MRS Type

0MRS

1EMRS

An~A3

A2~A0

Operating Mode

0

Valid

Normal Operation

_

_

All other states reserved

A0

DLL enable

0Enable

1

Disable

A1

Output Driver

Impedance Control

0

Full Strength Driver

1Half Strength Driver

* This part do not support/QFC function, A2 must be programmed to Zero.