IS42RM16800E-6BLI View Datasheet(PDF) - Integrated Silicon Solution

Part Name

Description

Manufacturer

IS42RM16800E-6BLI

16Mx8, 8Mx16, 4Mx32 128Mb Mobile Synchronous DRAM

Integrated Silicon Solution 

IS42SM81600E / IS42SM16800E / IS42SM32400E

IS42RM81600E / IS42RM16800E / IS42RM32400E

Extended Mode Register Definition

BA1 BA0 A11 A10 A9

A8

A7 A6 A5 A4 A3 A2 A1 A0 Address Bus (Ax)

Ext. Mode Reg. (Ex)

PASR

E2 E1 E0 Partial Array Self Refresh

Coverage

0 0 0 Fully array (4 banks) - (Default)

0 0 1 Half array (banks 0, 1)

0 1 0 Quarter array (bank 0)

0 1 1 Reserved

1 0 0 Reserved

1 0 1 One-eighth array (1/2 bank 0)

1 1 0 One-sixteenth array (1/4 bank 0)

1 1 1 Reserved

TCSR

E4 E3 Max. Case Temp.

0 0 70oC

0 1 45oC

1 0 15oC

1 1 85oC (Default)

DS

E6 E5 Driver Strength

0 0 Full strength driver (Default)

0 1 Half strength driver

1 0 Quarter strength driver

set to "0"

1 1 Reserved

E11 E10 E9 E8 E7 E6-E0

0 0 0 0 0 Valid Normal operation

– – – – – – All other states reserved

BA1 BA0 Mode Register Definition

0 0 Program Mode Register

0 1 Reserved

1 0 Program Extended mode Register

1 1 Reserved

The extended mode register is programmed via the MODE REGISTER SET command (BA1 = 1, BA0 = 0) and

retains the stored information until it is programmed again or the device loses power. The extended mode register

must be programmed with E7 through E11 set to “0.” 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 results in unspecified operation. The extended mode register must be

programmed to ensure proper operation.

Temperature-Compensated Self Refresh (TCSR)

TCSR allows the controller to program the refresh interval during self refresh mode, according to the case temperature

of the mobile device. This allows great power savings during self refresh during most operating temperature ranges.

Only during extreme temperatures would the controller have to select a higher TCSR level that will guarantee data

during self refresh.

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Integrated Silicon Solution, Inc. - www.issi.com

Rev.  B

04/15/2011

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