ics932s421b Integrated Device Technology, ics932s421b Datasheet - Page 17

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ics932s421b

Manufacturer Part Number

ics932s421b

Description

Pcie Gen 2 And Qpi Clock For Intel-based Servers

Manufacturer

Integrated Device Technology

Datasheet

1.ICS932S421B.pdf (23 pages)

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Current page: 17 of 23
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1340D—11/20/08

SMBus Table: SRC/PCI Frequency Control Register

SMBus Table: SRC/PCI Frequency Control Register

SMBus Table: SRC/PCI Spread Spectrum Control Register

SMBus Table: SRC/PCI Spread Spectrum Control Register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Byte 15

Byte 16

Byte 17

Byte 18

Integrated

Circuit

Systems, Inc.

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Pin #

Pin #

Pin #

Pin #

SRC M Div5

SRC M Div4

SRC M Div3

SRC M Div2

SRC M Div1

SRC M Div0

SRC N Div8

SRC N Div9

SRC N Div7

SRC N Div6

SRC N Div5

SRC N Div4

SRC N Div3

SRC N Div2

SRC N Div1

SRC N Div0

SRC SSP14

SRC SSP13

SRC SSP12

SRC SSP11

SRC SSP10

SRC SSP7

SRC SSP6

SRC SSP5

SRC SSP4

SRC SSP3

SRC SSP2

SRC SSP1

SRC SSP0

SRC SSP9

SRC SSP8

Reserved

Name

Name

Name

Name

M Divider Programming

N Divider Programming

Programming b(14:8)

Programming b(7:0)

N Divider Prog bit 8

N Divider Prog bit 9

Control Function

Control Function

Control Function

Control Function

Spread Spectrum

Spread Spectrum

17

Reserved

b(7:0)

bits

Type

Type

Type

Type

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

R

frequency. Default at power up

frequency. Default at power up

Byte 17 and 18 will program the

Byte 17 and 18 will program the

M and N Divider in Byte 15 and

M and N Divider in Byte 15 and

These Spread Spectrum bits in

These Spread Spectrum bits in

16 will configure the SRC VCO

16 will configure the SRC VCO

= latch-in or Byte 0 Rom table.

= latch-in or Byte 0 Rom table.

The decimal representation of

The decimal representation of

[NDiv(9:0)+8] / [MDiv(5:0)+2]

[NDiv(9:0)+8] / [MDiv(5:0)+2]

VCO Frequency = 14.318 x

VCO Frequency = 14.318 x

spread pecentage of SRC

spread pecentage of SRC

0

0

0

0

-

ICS932S421B

1

1

1

1

-

PWD

PWD

PWD

PWD

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

0

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