M65KG256AB datasheet(24/51 Pages) STMICROELECTRONICS

Part #	M65KG256AB

Description	256Mbit (4 Banks x 4M x 16) 1.8V Supply, 133MHz Clock Rate, DDR Low Power SDRAM

PDF	51 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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5 Registers description

M65KG256AB

24/51

5.2

Extended Mode Register description

The Extended Mode Register is used to program the low-power Self Refresh operation of the

device:

●

Partial Array Self Refresh

●

Driver Strength

●

Automatic Temperature Compensated Self Refresh.

It is loaded by issuing a Extended Mode Register Set command (EMRS) with BA0-BA1 set to

‘01’ to select the Extended Mode Register.

Table 8: Extended Mode Register Definition, shows the available Extended Mode Register

configurations.

Table 8.

Extended Mode Register Definition

Address

Bits

Mode Register

Bit

Description

Value

Description

A12-A10

000

EMR9

Automatic Temperature

Compensated Self Refresh Bits

Enabled

Reserved

A8-A7

A6-A5

EMR6-EMR5

Driver Strength Bits

Full Strength

1/2 Strength

1/4 Strength

1/8 Strength

A4-A3

A2-A0

EMR2-EMR0

Partial Array Self Refresh Bits

000

All Banks

001

Bank A and Bank B (BA1=0)

010

Bank A (BA0 and BA1 =0)

Other configurations reserved

BA1-BA0

M65KG256AB Datasheet(PDF) 24 Page - STMicroelectronics

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