October 2003

P1817A/B

rev 1.0

Low Frequency EMI Reduction

3 of 10

Notice: The information in this document is subject to change without notice.

Standby Mode Selection

CLKIN

SSON/SBM

Spread

Spectrum

ModOUT

PLL

Mode

Disabled

0

N/A

Disabled

Disabled

Standby

Disabled

1

N/A

Disabled

Free Running

Free Running

Enabled

0

Off

Reference

Disabled

Buffer out

Enabled

1

On

Normal

Normal

Normal

Spread Range Selection, VDD = 5V

CLKIN frequency

SR0

Spreading Range

Modulation Rate

1

± 1.5%

10 MHz

0

± 1.9%

1

± 1.36%

14.318MHz

0

± 1.64%

1

± 1.3%

15MHz

0

± 1.5%

1

± 0.95%

20MHz

0

± 1.125%

(CLKIN/10) * 20.83KHz

Spread Range Selection, VDD = 3.3V

CLKIN frequency

SR0

Spreading Range

Modulation Rate

1

± 1.5%

10 MHz

0

± 1.65%

1

± 1.4%

14.318MHz

0

± 1.7%

1

± 1.37%

15MHz

0

± 1.63%

1

± 1.1%

20MHz

0

± 1.28%

(CLKIN/10) * 20.83KHz