IDTCV174CPVG datasheet(10/21 Pages) IDT

Part #	IDTCV174CPVG

Description	PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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COMMERCIALTEMPERATURERANGE

10

IDTCV174C

PROGRAMMABLEFLEXPCCLOCKFORP4PROCESSOR

BYTE 14

Bit

Output(s)Affected

Description / Function

0

1

Type

Power On

7

SRC skew selection

250ps

400ps

RW

0

6

Reserved

RW

0

5

Reserved

RW

0

4

SRC3, 4, 5, 6

Strength(outputimpedance)

17

Ω

25

Ω

RW

0

3

SRC2, 7, 8

Strength

17

Ω

25

Ω

RW

0

2

CPU strength

Strength

17

Ω

25

Ω

RW

0

1

SRC0/ DOT strength

Strength

17

Ω

25

Ω

RW

0

SRC1/ PLL3CLK Strength

Strength

17

Ω

25

Ω

RW

0

BYTE 16

Bit

Output(s)Affected

Description / Function

0

1

Type

Power On

7

WDEAPD

Set Byte15 bit7 = 1 after Power Down

Disabled

Enabled

RW

0

to enable the watch dog after the power down

6

Reserved

RW

0

5

Reserved

RW

0

4

Reserved

RW

0

3

Reserved

RW

0

2

IB1

Increment bit1, fine tune CPU frequnecy

See IB table

RW

0

1

IB0

Incrementbit0

See IB table

RW

0

CPUN8

RW

FS latch

BYTE 17 (PLL1)

Bit

Output(s)Affected

Description / Function

0

1

Type

Power On

7

CPUN7

RW

6

CPUN6

RW

5

CPUN5

CPU frequency = N*Resolution

RW

4

CPUN4

(seeResolutiontable,

RW

FS latch

3

CPUN3

N-ProgrammingProcedure)

RW

2

CPUN2

RW

1

CPUN1

RW

0

CPUN0

RW

BYTE 15, WATCH DOG(1)

Bit

Output(s)Affected

Description / Function

0

1

Type

Power On

7

WatchDogEnable

Watch Dog Alarm Enable

Disabled

Enabled

RW

0

6

WatchDogSelect

Watch Dog Hard/Soft Alarm Select Hard Alarm Only Hard and Soft Alarm

RW

0

5

Watch Dog Hard Alarm Status

Normal

Alarm

R

4

Watch Dog Soft Alarm Status

Normal

Alarm

R

3

WatchDogcontrol

Watch Dog Time Base Control

290msbase

1160msbase

RW

0

2

WD_1_Timer2

WatchDog_1_AlarmTimer

RW

1

WD_1_Timer1

Defaultis7*290ms

RW

1

0

WD_1_Timer0

RW

1

NOTE:

1. Hard Alarm switch to HW FS frequency.

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