ICS952702 datasheet(8/17 Pages) ICST

Part #	ICS952702

Description	Programmable Timing Control Hub for K7 System

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Manufacturer	ICST [Integrated Circuit Systems]

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8

Integrated

Circuit

Systems, Inc.

ICS952702

0795D—05/06/05

I

2C Table: Slew Rate Control Register

Bit 7

PCIStr1

RW

1

Bit 6

PCIStr0

RW

1

Bit 5

PCIStr1

RW

1

Bit 4

PCIStr0

RW

1

Bit 3

PCIStr1

RW

1

Bit 2

PCIStr0

RW

1

Bit 1

AGPStr1

RW

1

Bit 0

AGPStr0

RW

1

I

2C Table: Reserved Register

Bit 7

Reserved

R

-

1

Bit 6

Reserved

R

-

1

Bit 5

Reserved

R

-

1

Bit 4

Reserved

R

-

1

Bit 3

Reserved

R

-

1

Bit 2

Reserved

R

-

1

Bit 1

Reserved

R

-

1

Bit 0

Reserved

R

-

1

I

2C Table: Byte Count Register

Bit 7

BC7

RW

-

0

Bit 6

BC6

RW

-

0

Bit 5

BC5

RW

-

0

Bit 4

BC4

RW

-

0

Bit 3

BC3

RW

-

1

Bit 2

BC2

RW

-

1

Bit 1

BC1

RW

-

1

Bit 0

BC0

RW

-

1

I

2C Table: Watchdog Timer Control Register

Pin #

Name

Control Function

Type

0

1

PWD

Bit 7

WDSA control

WD soft alarm control

RW

Disable

Enable

0

Bit 6

WDHRB

WD Hard Alarm Status

Read back

RNormal

Alarm

X

Bit 5

WDSRB

WD Soft Alarm Status

Read back

RNormal

Alarm

X

Bit 4

GR_EN

Gear Shift Reset Enable

RW

Disable

Enable

0

Bit 3

WDTCtrl

Watch Dog Time base

control

RW

290ms base

1160ms base

0

Bit 2

WD2

WD Timer Bit2

RW

1

Bit 1

WD1

WD Timer Bit1

RW

1

Bit 0

WD0

WD Timer Bit0

RW

1

AGPCLK Strength

Control

00=.7x; 01=.8x; 10=.9x; 11=1x Strength

PCICLK(2:0) Strength

Control

00=.63x; 01=.75x; 10=.88x; 11=1x

Strength

PCICLK(5:3) Strength

Control

00=.63x; 01=.75x; 10=.88x; 11=1x

Strength

PCICLK_F(1:0) Strength

Control

00=.63x; 01=.75x; 10=.88x; 11=1x

Strength

PWD

01

PWD

1

0

1

0

Byte 9

-

Name

-

Byte 7

Pin #

-

Type

Control Function

-

Byte 6

Pin #

Name

-

Type

-

Control Function

Byte 8

Pin #

Name

Writing to this register will

configure how many

bytes will be read back,

default is 0F = 15 bytes.

-

These bits represent X*290ms (or

1.16S) the watchdog timer will wait

before it goes to alarm mode. Default is

7 X 290ms =2s.

Control Function

Type

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