Rev 0.3

EMLS232TA Series

512K x 32 x 4Banks Low Power SDRAM

A. MODE REGISTER FIELD TABLE TO PROGRAM MODES

Register Programmed with Normal MRS

Normal MRS Mode

Register Programmed with Extended MRS

EMRS for PASR(Partial Array Self Ref.) & DS(Driver Strength)

NOTE :

1. If A10/AP is high during MRS cycle, “Wrap off mode” function will be enabled. This mode support only sequential burst type.

2. RFU(Reserved for future use) should stay “0” during MRS cycle.

3. If A9 is high during MRS cycle, “Burst Read Single Bit Write” function will be enabled.

Address

BA0 ~ BA1

A8

A7

A6

A5

A4

A3

A2

A1

A0

Function

"0" Setting for

Normal MRS

Wrap Mode

0: Wrap on

1: Wrap off

W.B.L

Test Mode

CAS Latency

BT

Burst Length

Test Mode

CAS Latency

Burst Type

Burst Length

A8

A7

Type

A6

A5

A4

Latency

A3

Type

A2

A1

A0

BT=0

BT=1

0

0

Mode Register Set

0

0

0

Reserved

0

Sequential

0

0

0

1

1

0

1

Reserved

0

0

1

1

1

Interleave

0

0

1

2

2

1

0

Reserved

0

1

0

2

Mode Select

0

1

0

4

4

1

1

Reserved

0

1

1

3

BA1

BA0

Mode

0

1

1

8

8

Write Burst Length

1

0

0

Reserved

0

0

setting

for Nor-

mal

MRS

1

0

0

Reserved

Reserved

A9

Length

1

0

1

Reserved

1

0

1

Reserved

Reserved

0

Burst

1

1

0

Reserved

1

1

0

Reserved

Reserved

1

Single Bit

1

1

1

Reserved

1

1

1

Full Page

Reserved

Address

BA1

BA0

A10/AP

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

Function

Mode Select

DS

PASR

Mode Select

Driver Strength

PASR

BA1

BA0

MODE

A6

A5

Driver Strength

A2

A1

A0

Size of Refreshed Array

0

0

Normal MRS

0

0

Full

0

0

0

Full Array (default)

0

1

Reserved

0

1

1/2 (default)

0

0

1

1/2 of Full Array

1

0

EMRS for Low Power SDRAM

1

0

1/4

0

1

0

1/4 of Full Array

1

1

Reserved

1

1

1/8

0

1

1

Reserved

Reserved Address

1

0

0

Reserved

A10/AP

A9

A8

A7

A4

A3

1

0

1

Reserved

0

0

0

0

0

0

1

1

0

Reserved

1

1

1

Reserved

Full Page Length x32 : 64Mb(256)