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SY87729/39L

 Evaluation Board

Micrel, Inc.

M9999-071906
[email protected] or (408) 955-1690

DESCRIPTION

DC coupled and terminated PECL inputs

AC coupled PECL outputs

Programmable via any PC using printer cable

Includes a 27.0000MHz oscillator on board

FEATURES

SY87729L 10MHz to 365MHz
SY87739L 10MHz to 729MHz
FRACTIONAL-N SYNTHESIZERS

SuperCOM™

SY87729L
SY87739L

Evaluation Board

EVALUATION BOARD COMPONENTS

SY87729/39L evaluation board

SY87729/39L data sheet and this document

SY87729/39L software (download from
http://www.micrel.com/product-info/
fractional_n_synthesizers.shtml)

Two length-matched 1 foot SMA cables (optional,
user supplied)

PC running Windows (user supplied)

Printer cable, parallel-to-centronics (user supplied)

Rev.:  B

Amendment: /0

Issue Date:

July 2006

The SY87729/39L are rate independent fractional-N

frequency synthesizer ICs. From a single reference source,
they can generate any clock frequency from 10MHz to
729MHz very accurately.

This document provides a detailed description of the

evaluation board, evaluation procedure and the simple
configuration software it uses. Complete information in this
document includes:

1. Test setup and measuring frequency output with

a signal generator.

2. Test setup and measuring jitter with an internal

reference oscillator.

3. Download and use of the configuration software

4. Board schematic and Bill of Materials.

SuperCOM is a trademark of Micrel, Inc.

Power
Banana Jack
(J1)

Synthesized
Clock Outputs

Reference

Oscillator

Outputs

Reference

Clock Inputs

Centronics

Programming Port

Ground
Banana Jack
(J2)

Содержание SY87729L

Страница 1: ...rinter cable parallel to centronics user supplied Rev B Amendment 0 Issue Date July 2006 The SY87729 39L are rate independent fractional N frequency synthesizer ICs From a single reference source they...

Страница 2: ...ength matched one foot SMA cables or a digital signal generator such as the HP8133A 3 A PC with a parallel port running Windows 4 If you are running Windows NT Windows 2000 or Windows XP you will need...

Страница 3: ...oads on the default parallel port LPT1 You may instead decide to allow downloads only on LPT2 if your computer is equipped with a second parallel port or you may also decide to allow two SY87729 39L E...

Страница 4: ...ng only LPT2 the Direct IO control panel should look like Figure 6 Figure 6 Correct I O Addresses for LPT2 Access Finally to access both LPT1 and LPT2 the Direct IO control panel should look like Figu...

Страница 5: ...zer should be used That is why the calculation module starts with the Use radio button selected in the Wrapper group box This tells the calculation module to use the wrapper synthesizer if there is so...

Страница 6: ...s output frequency are shown These parameters could be used by a firmware engineer to program an embedded processor to configure SY87729 39L In the above example the wrapper synthesizer is used to obt...

Страница 7: ...he download application Next the configuration parameters are entered Lastly the configuration is downloaded and it is verified that no errors in the configuration parameters have occurred The first s...

Страница 8: ...ly take on a value between 17 and 32 inclusive PostDiv 1 16 18 20 The value in the PostDiv configuration edit box may only be one of the values 22 24 26 28 30 32 36 listed 40 44 48 52 56 60 MDIV 15 18...

Страница 9: ...enced to VCC so the voltage to set the signal generator to depends on the value of VCC For a VCC of 3 3V the high level of the clock signal should be between 2 135V and 2 42V The low level of the cloc...

Страница 10: ...nd have the calculation module determine the configuration parameters Have the download module configure the SY87729 39L evaluation board and verify that the indicator at the upper right of the downlo...

Страница 11: ...interface pin 11 This is how the applications software determines whether or not an SY87729 39L evaluation board is attached to the parallel port 1 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 24 23 22 21...

Страница 12: ...uation Board Part IC Package Operating Range SY87729L EVAL EPAD TQFP 32 40 C to 85 C SY87739L EVAL EPAD TQFP 32 40 C to 85 C MICREL INC 2180 FORTUNE DRIVE SAN JOSE CA 95131 USA TEL 1 408 944 0800 FAX...

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