ICS950223 datasheet(10/24 Pages) ICST

10 / 24 page

Integrated

Circuit

Systems, Inc.

ICS950223

0496C—05/06/05

C Table: Frequency Select Register

Bit 7

FS Source

Frequency H/W IIC

Select

Latch Inputs

IIC

Bit 6

FS6

Freq Select Bit 6

Bit 5

FS5

Freq Select Bit 5

Bit 4

FS4

Freq Select Bit 4

Bit 3

FS3

Freq Select Bit 3

Bit 2

FS2

Freq Select Bit 2

Bit 1

FS1

Freq Select Bit 1

Bit 0

FS0

Freq Select Bit 0

C Table: Spreading and Device Behavior Control Register

Bit 7

SS1

Spread Select 1

Bit 6

SS0

Spread Select 0

Bit 4

WDS_Status

WD Soft Alarm Status

Normal

Alarm

Bit 3

Reserved

Bit 2

CPUT2/CPUC2

Output Control

Disable

Enable

Bit 1

CPUT1/CPUC1

Output Control

Disable

Enable

Bit 0

CPUT0/CPUC0

Output Control

Disable

Enable

SS_EN

Spread Enable Control

OFF

Control Function

Type

1PWD

See Table 1: QuadRom

Frequency Selection Table

PWD

See Table 2: Spread

Spectrum Table

Name

Type

Byte 0

Pin #

Control Function

Name

45/44

Byte 1

Pin #

Bit 5

38/37

41/40

Table2: Spread Spectrum Select

SS1

SS0

(Byte 1 bit 7)

(Byte 1 bit 6)

0.35%

Spread 1

0.50%

Spread 2

0.75%

Spread 3

1.00%

Spread 4

Spread %

Note

C Table: Output Control Register

Bit 7

AEN#

3V66/PCI Freq Source

Select

CPU_PLL

Sync

FIX_PLL

Async

Bit 6

PCICLK9

Output Control

Disable

Enable

Bit 5

PCICLK8

Output Control

Disable

Enable

Bit 4

PCICLK7

Output Control

Disable

Enable

Bit 3

PCICLK6

Output Control

Disable

Enable

Bit 2

PCICLK5

Output Control

Disable

Enable

Bit 1

PCICLK4

Output Control

Disable

Enable

Bit 0

PCICLK3

Output Control

Disable

Enable

1PWD

Name

Control Function

Type

Byte 2

Pin #

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