ICS932S422C Datasheet, PDF(15/21 Page) Integrated Circuit Systems – PCIe Gen 2 main Clock for Intel-based Servers

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ICS932S422C Datasheet, PDF (15/21 Pages) Integrated Circuit Systems – PCIe Gen 2 main Clock for Intel-based Servers

◁

Integrated

Circuit

Systems, Inc.

ICS932S422C

SMBus Table: SRC Frequency Control Register

Byte 15

Pin #

Name

Control Function

Bit 7

SRC N Div8

N Divider Prog bit 8

Bit 6

SRC N Div9

N Divider Prog bit 9

Bit 5

Bit 4

SRC M Div5

SRC M Div4

Bit 3

Bit 2

SRC M Div3

SRC M Div2

M Divider Programming

bits

Bit 1

SRC M Div1

Bit 0

SRC M Div0

Type

PWD

RW The decimal representation of X

RW M and N Divider in Byte 15 and X

RW 16 will configure the SRC VCO X

RW frequency. Default at power X

RW up = latch-in or Byte 0 Rom X

RW table. VCO Frequency =

RW 14.318 x [NDiv(9:0)+8] /

[MDiv(5:0)+2]

SMBus Table: SRC Frequency Control Register

Byte 16

Pin #

Name

Control Function

Bit 7

Bit 6

SRC N Div7

SRC N Div6

Bit 5

SRC N Div5

Bit 4

Bit 3

SRC N Div4

SRC N Div3

N Divider Programming

b(7:0)

Bit 2

SRC N Div2

Bit 1

SRC N Div1

Bit 0

SRC N Div0

Type

PWD

RW The decimal representation of X

RW M and N Divider in Byte 15 and X

RW 16 will configure the SRC VCO X

RW frequency. Default at power X

RW up = latch-in or Byte 0 Rom X

RW table. VCO Frequency =

RW 14.318 x [NDiv(9:0)+8] /

[MDiv(5:0)+2]

SMBus Table: SRC Spread Spectrum Control Register

Byte 17

Pin #

Name

Control Function

Bit 7

SRC SSP7

Bit 6

Bit 5

SRC SSP6

SRC SSP5

Bit 4

Bit 3

SRC SSP4

SRC SSP3

Spread Spectrum

Programming b(7:0)

Bit 2

Bit 1

SRC SSP2

SRC SSP1

Bit 0

SRC SSP0

Type

PWD

These Spread Spectrum bits in

Byte 17 and 18 will program

RW the spread pecentage of SRC X

SMBus Table: SRC Spread Spectrum Control Register

Byte 18

Pin #

Name

Control Function

Bit 7

Reserved

Bit 6

SRC SSP14

Bit 5

SRC SSP13

Bit 4

Bit 3

Bit 2

SRC SSP12

SRC SSP11

SRC SSP10

Spread Spectrum

Programming b(14:8)

Bit 1

SRC SSP9

Bit 0

SRC SSP8

Type

PWD

RW These Spread Spectrum bits in X

RW Byte 17 and 18 will program X

RW the spread pecentage of SRC X

1412Aâ12/10/07

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