2

ICS9219

0931B—10/25/04

Pin Descriptions

PIN #

PIN NAME

PIN TYPE

DESCRIPTION

1

VDDT

PWR/IN

Power supply, nominal 3.3V/Test mode

2

GND

PWR

Ground pin.

3

X2

OUT

Crystal output (14MHz to 25MHz)

4X1

IN

Crystal input (14MHz to 25MHz)

5

VDD

PWR

Power supply, nominal 3.3V

6

REF

OUT

Reference of Input

7

GND

PWR

Ground pin.

8FS1*

IN

Frequency select pin.

9FS2*

IN

Real-time frequency select pin with internal 120Kohm pull-up resistor (check

SMBus HW/SW setting for priority).

10

VDD

PWR

Power supply, nominal 3.3V

11

GND

PWR

Ground pin.

12

BUSCLKC

OUT

Output clock connected to the Rambus channel. This output is the complement

of BUSCLK.

13

BUSCLKT

OUT

Output clock connected to the Rambus channel. This output is the true

component of BUSCLK.

14

GND

PWR

Ground pin.

15

VDD

PWR

Power supply, nominal 3.3V

16

FS0*

IN

Frequency select pin.

* Pins have 60K internal pull-up to VDD

Table 2: Function Table

3.3V

0

0

0

16

NORMAL

INPUT x MULT

BUSCLKC

INPUT

3.3V

1

1

1

21.33

NORMAL

INPUT x MULT

BUSCLKC

INPUT

3.3V

1

1

0

16

NORMAL

INPUT x MULT

BUSCLKC

INPUT

3.3V

0

0

1

21.33

NORMAL

INPUT x MULT

BUSCLKC

INPUT

3.3V

1

0

X

-

TEST

BUSCLKT/2

BUSCLKC/2

INPUT

3.3V

0

1

X

-

TEST

BUSCLKT/4

BUSCLKC/4

INPUT

0

0

0

X

-

TEST

X1

X1(INVERT)

INPUT

0

1

1

X

-

TEST

X1

X1(INVERT)

INPUT

0

1

0

X

-

TEST

X1/2

X1(INVERT)/2

INPUT

0

0

1

X

-

TEST

X1/4

X1(INVERT)/4

INPUT

BUSCLKC

REF

VDDT

FS(2:0)

INPUT

MULT

MODE

BUSCLKT