82845MP datasheet(47/157 Pages) INTEL

Part #	82845MP

Description	Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)

PDF	157 Pages

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Manufacturer	INTEL [Intel Corporation]

Direct Link	http://www.intel.com

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47 / 157 page

Intel

® 82845MP/82845MZ Chipset-Mobile (MCH-M)

250687-002

Datasheet

3.6.5.

CKSTR – Strength Control Register for CK Signal Group (CK /

CK#)

Address Offset:

33h

Default Value:

00h

Access:

Read Only, Read/Write

Size:

8 bits

This register controls the drive strength of the I/O buffers for the CK signal group, which includes both

the CK and CK# signals. This group has two possible loadings depending on the width of SDRAM

devices used in each Row of memory (x8 or x16). The proper strength can be independently programmed

for each configuration. The actual strength used for each signal is determined by the DRAM Width

Bit

Descriptions

Reserved

6:4

CK x16 Strength Control: Sets drive strength as shown below:

000 = 0.75 X (default)

001 = 1.00 X

010 = 1.25 X

011 = 1.50 X

100 = 2.00 X

101 = 2.50 X

110 = 3.00 X

111 = 4.00 X

Reserved

2:0

CK x8 Strength Control: Sets drive strength as shown below:

000 = 0.75 X (default)

001 = 1.00 X

010 = 1.25 X

011 = 1.50 X

100 = 2.00 X

101 = 2.50 X

110 = 3.00 X

111 = 4.00 X

82845MP Datasheet(PDF) 47 Page - Intel Corporation

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