Philips Semiconductors

Product specification

PCK2020

CK00 (100/133MHz) spread spectrum

differential system clock generator

2000 Nov 13

5

FUNCTION TABLES

SEL

100/133

SELA

SELB

HOST

3V66

3V33 PCI

48 MHz

REF

0

0

0

100 MHz

50 MHz

66.7 MHz

33.3 MHz

48 MHz

14.318 MHz

0

0

1

48 MHz

14.318 MHz

0

1

0

200 MHz

50 MHz

66.7 MHz

33.3 MHz

N/A

N/A

0

1

1

HI-Z

HI-Z

HI-Z

HI-Z

HI-Z

HI-Z

1

0

0

133 MHz

66.7 MHz

66.7 MHz

33.3 MHz

48 MHz

14.318 MHz

1

0

1

48 MHz

14.318 MHz

1

1

0

200 MHz

66.7 MHz

66.7 MHz

33.3 MHz

48 MHz

14.318 MHz

1

1

1

TCLK/2

TCLK/4

TCLK/4

TCLK/8

TCLK/2

TCLK

NOTE:

1. These frequencies are for debug and thus can vary a small amount from the values listed at the vendor’s discretion.

SEL

100/133

SELA

SELB

HOST

0

0

0

Active 100 MHz

0

0

1

Active 100 MHz – ~5% over-clock

0

1

0

0

1

1

HI-Z all outputs

1

0

0

Active 133 MHz

1

0

1

Active 133.3 MHz minus ~5 under-clock

1

1

0

1

1

1

Test mode

POWER DOWN MODE

PWRDWN

HOST/HOST_BAR

MREF/MREF_B

3V66

PCI

48 MHz

REF

14.318/66 MHz Seeds

Asserts low

0 = Active

HOST_BAR

LOW

LOW

LOW

LOW

OFF

LOW/(if applicable)

NOTE:

1. The differential outputs should have a voltage forced across them when power down is asserted.

SPREAD SPECTRUM FUNCTION TABLE

SPREAD

FUNCTION

48 MHz PLL

REF/MULTSEL0

REF/MULTSEL1

1

No spread

No spread

0

Down spread –0.5%

No spread