PLL702-06

Clock Generator for Printer Applications

47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991

www.phaselink.com

Rev 10/26/05 Page 1

^: Internal pull-up resistor

*: Bi-directional pin

1

2

3

4

5

6

7

8

XIN

XOUT

VDDA

VDDD

GNDUSB

VDDUSB

VDDCPU

Note :

SS0^

SS1^

GNDA

GNDD

GNDCPU

CPU

16

15

14

13

12

11

10

9

FEATURES

• 1 CPU Clock output with selectable frequencies (50,

66.67, 75, 80, 83.3, 90, 100,125 or 133 MHz).

• 1 Selectable 48, 30 or 12MHz USB Clock output.

• Selectable Spread Spectrum (SST) for EMI reduction

on CPU clock.

• PowerPC compatible CPU Clock.

• Advanced, low power, sub-micron CMOS processes.

• 14.31818MHz fundamental crystal input.

• 3.3V and/or 2.5V operation.

•

DESCRIPTION

The PLL702-06 is a low cost, low jitter, and high

performance clock synthesizer for generic Printer

applications. It provides one CPU clock and a selectable

48, 30 or 12MHz (USB) output. The user can choose

among 9 different clock frequencies and 3-selectable down-

spread Spread Spectrum modulation to reduce EMI on

CPU clock. All frequencies are generated from a single low

cost 14.31818MHz crystal. CPU clock can be driven from

an independent 2.5V or 3.3V power supply.

PIN CONFIGURATION

CPU CLOCK FREQUENCY TABLE

FS1

FS0

CPU (MHz)

0

0

50

0

M

66.67

0

1

75

M

0

80

M

M

83.33

M

1

90*

1

0

100

1

M

125

1

1

133*

BLOCK DIAGRAM

XTAL

OSC

XIN

XOUT

SS(0:1)

PLL

SST

Control

Logic

PLL

Control

Logic

USB_SEL

FS(0:1)

VDDUSB

USB

VDDCPU

CPU

*Notes: Actual CPU frequency for 90Mhz is 88.88Mhz, 133Mhz is 130.9Mhz