ICS614-01

16 pin Intel Graphics Clock Source

MDS 614-01 B

2

Revision 020199

Printed 11/14/00

Integrated Circuit Systems • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • (408) 295-9818fax

I C R O

PRELIMINARY INFORMATION

Pin Descriptions

Key: I = Input; O = output; P = power supply connection; XI, XO = crystal connections.

Pin Assignment

Number

Name

Type

Description

1

OE

I

Output Enable. Tri-states all output clocks when low. All running when high (VDDIO).

2

X2

XO

Crystal connection. Connect to a 27 MHz fundamental parallel mode crystal.

3

X1/ICLK

XI

Crystal connection. Connect to a 27 MHz fundamental parallel mode crystal, or clock

4

VDD

P

Connect to +5V.

5

GND

P

Connect to ground.

6

DSEL

I

Input select. Determines DCLK and DCLK/2 per table above. Must be

≤ VDDIO.

7

27M

O

Buffered crystal oscillator 27 MHz clock output. Amplitude = VDDIO.

8

DCLK/2

O

NTSC or PAL 4X subcarrier frequency per table above. Amplitude = VDDIO.

9

48M

O

48.00 MHz clock output for Intel graphics processor. Amplitude = VDDIO.

10

DCLK

O

NTSC or PAL 8X subcarrier frequency per table above. Amplitude = VDDIO.

11

ACLK

O

Audio clock, or Square Pixel clock, per table above. Amplitude = VDDIO.

12

GND

P

Connect to ground.

13

VDDIO

P

Connect to +5V or +3.3V. Amplitude of output clocks will match this voltage.

14

13.5M

O

Buffered crystal oscillator divided by two 13.5 MHz clock output. Amplitude = VDDIO.

15

ASEL0

I

Input select 0 for ACLK. Determines ACLK frequency per table above. Must be

≤ VDDIO.

16

ASEL1

I

Input select 1 for ACLK. Determines ACLK frequency per table above. Must be

≤ VDDIO.

ICS614-01

All Clock frequencies are in MHz.

0=connect directly to ground

1=connect directly to VDDIO

1

8

9

16

2

3

4

5

6

7

10

11

12

13

14

15

ACLK

13.5M

ASEL0

VDDIO

GND

OE

X2

27M

DSEL

VDD

GND

X1/ICLK

DCLK/2

DCLK

ASEL1

48MHz

ASEL1

ASEL0

ACLK

0

0

Off

0

1

29.4923 MHz

1

0

24.5454 MHz

1

1

24.576 MHz

DSEL

DCLK

DCLK/2

0

35.4689

17.73445

1

28.63636

14.31818

DCLK Select Table for NTSC/PAL

ACLK Select Table for Audio and Square Pixel