IDT VersaClock 3S Manual de usuario

USER GUIDE

VersaClock®3S - 5P35021 Evaluation Board

Introduction

The evaluation board is designed to help the customer evaluate the 5P35021, the latest addition to the family of programmable

devices in IDT's Timing portfolio. When the board is connected to a PC running IDT Timing Commander™ Software through

USB, the device can be configured and programmed to generate different combinations of frequencies.

Board Overview

Use Figure 1 and Table 1 to identify: power supply jacks, USB connector, input and output frequency SMAconnectors.

Figure 1. 5P35021 Evaluation Board Overview

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VERSACLOCK®3S - 5P35021 Evaluation Board

Table 1: Evaluation Board Pins and Functions

Item Name On-Board Connector Label Function

0 Power supply jack J18 Connect to 1.8V, 2.5V, or 3.3V for the output voltage of

the device

1 Ground jack J19 If J18 & J17are used for power supply, this is the return

power

2 Output voltage jack J17 Connect to 3.3V core voltage of the device

3 USB connector J3 Connect this USB to your PC to run IDT Timing

Commander

4 DIP switch U6 This is used to configure the device in different modes

5 Differential clock input CLKIN/CLKINB A differential clock can be connected as source for the

device

(cont.) Single-ended clock input CLKINB A Single-ended clock can be connected as source for

the device using CLKINB only

6 Crystal, 25 MHz Y1 This crystal is used as a reference source for the clock

signal

7 Differential output DIFF_C1/T1 This can be a differential pair, or two single-ended

outputs. By default, it’s a LPHCSL differential output.

8 Differential output DIFF_C0/T0 This can be a differential pair, or two single-ended

outputs. By default, it’s a LPHCSL differential output.

9 Single-ended output SE_1 This is the single-ended output. By default it’s an

LVCMOS single-ended output

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VERSACLOCK®3S-5P35021EvaluationBoard

Board Power Supply

Power Supply Options

The core voltage includes a digital voltage VDD33 and an analog voltage VDDA. Both core voltages can be powered by an

external bench power supply or by USB.

•Bench Power Supply – To supply VDD33 with a bench power supply, connect power to J17. To supply VDDA with a bench

power supply, connect power to J18. At the same time, place the jumpers as shown in Figure 2B.

•USB Power Supply – When the board is connected to a PC through a USB cable, on-board voltage regulators will generate

a 3.3V for the device. In this case, place the jumper as shown in Figure 2A. See JP5 jumper position for the on-board voltage

regulators in the following figure. USB power source is recommended because it's readily available right from your laptop.

Figure 2. Jumping to the Pin configuration as shown (Figure 2A.) will select power source from on-board

voltage regulators powered by USB; Jumping to the Pin configuration as shown (Figure 2B.) will

select the bench power supply

Output Clock Voltages

Like VDDAand VDD33 having two sources, each output voltage is also provided with two sources to choose from: bench power

supply or powered from USB. The selection is made by a 4-way header as shown in Figure 3 below.

The jumper can be used to select a voltage for E1, E2, E3, E4, and E5 respectively. The on-board voltage regulators powered

by USB are 1.8V, 2.5V and 3.3V; VDDOJ is from bench power supply connecting to JP17 and JP18. Each output voltage can

be individually selected. Use the label on the evaluation board: E1 for VDDDIFF1, E2 for VDDSE1, E3 for VDDDIFF2, E4 for

VDDSE2 and E5 for VDDSE3. The JP6 on the EVB needs to be in the default position as supplied by the manufacturer.

Note: Connect the USB to the board when using external power supply

Figure 3. Jumper Configuration for On-board Voltage Regulators

Figure 2A. (JP5: Pin 1 - 2 to Voltage Regulators) Figure 2B. (JP5: Pin 2 - 3 to Banana Jack)

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VERSACLOCK®3S - 5P35021 Evaluation Board

Connecting the Board

The board is connected to a PC through a USB connector for configuring and programming the device, as shown in Figure 4

below. The USB interface will also provide +5V power supply to the board, from which on-board voltage regulators generate

various voltages for the core as well as for each output.

The board can also be powered by a benchpower supply by connectingtwo banana jacks J17, J18 foroutput and core voltages,

respectively. Please see board power supply section for details.

Note: The USB port only supports USB 2.0; USB 3.0 is not supported at this time.

Figure 4. Connecting the Board with USB Port for Communications with Timing Commander Software

On-Board Crystal

A 25MHz crystal is installed on the board. It is used as a source for reference frequency.

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VERSACLOCK®3S-5P35021EvaluationBoard

Board Default Frequency Output

Table 2: Board Default Frequency Output

DIP Switch (U6)

Table 3: DIP Switch (U6)

Configuration and Setup

Table 4: Configuration and Setup from I2C Port

Serial Output Output Frequency

1 SE_1 (Single-ended) –

2 DIFF_CO/TO (Differential Output) 100 MHz

3 DIFF_C1/T1 (Differential Output) 100 MHz

Serial DIP Switch Pin Number DIP Switch Pin Name State Mode

A 1 SDA_DFCO Floating/Tristate –

B 2 SCL_DFC1 High or 1 I2C

C 3, 5, 7 SMA_OE1, SMA_OE2, SMA_OE3 High or 1 –

D 4, 6, 8 OE1, OE2, OE3 High or 1 –

Step No. Steps Comments

1 Set SCL_OFC1 Pin (DIP Switch PIN 2) High or 1

2 Launch 5P35021 Timing Commander Software Refer to 5P35021 Timing Commander User Guide

Timing Commander Software

3 Follow the “Getting Started Steps” – in Timing

Commander Software –

4 Using the Timing Commander GUI, start a new settings

file, or open a pre-optimized file. Configure the Timing Commander Software for the

required sets of Outputs

5 Connect J3 to a USB Port using the supplied I2C cable An I2C connection is established between GUI

software and VC3S device

6 Connect to the EVB by clicking on the microchip icon

located at the right of the timing commander

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VERSACLOCK®3S - 5P35021 Evaluation Board

Board Schematics

Evaluation board schematics are shown on the following pages.

Figure 5. Evaluation Board Schematic (I)

7 Once configured, new options will be available on a

green background indicating that the EVB has

successfully connected with the board.

–

8 Write the setting to the device by clicking on the write all

registers to the chip option

9 All intended outputs should be available for

measurement. –

Step No. Steps Comments

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VERSACLOCK®3S-5P35021EvaluationBoard

Figure 6. Evaluation Board Schematic (II)

Figure 7. Evaluation Board Schematic (III)

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Figure 8. Evaluation Board Schematic (IV)

Signal Termination Options

Termination options for Differential Output 1 - 2 in the evaluation board are displayed in Figure 9. The termination circuits are

designed to optionally terminate the output clocks in LVPECL, LVDS, LVCMOS and HCSL signal types by populating (or

not-populating) some resistors. DC or AC coupling of these outputs are also supported.

Table 5 and Table 6, below, tabulates component installations to support LVPECL, HCSL, LVCMOS and LVDS signal types for

OUTPUT1 - 2, respectively. Please note that by doing so, the output signals will be measured and terminated by an oscilloscope

with a 50internal termination.

Figure 9. Output Termination Options

DIFF_CO/TO DIFF_C1/T1

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VERSACLOCK®3S-5P35021EvaluationBoard

Table 5: Termination Options for Differential Output 1 (DIFF_CO/TO)

Table 6: Termination Options for Differential Output 2 (DIFF_C1/T1)

As noted, 4-resistor network is not installed in Table 5 and Table 6 because oscilloscope with internal 50termination is utilized

for signal termination and measurement. If an AC-coupled, stand-alone LVPECL output is needed (without oscilloscope

connections), the 4-resistor network needs to be installed accordingly.

Table 7: Termination for Single-ended Output 1 (SE_1)

Table 8: Termination for Differential and Single-ended Input)

Note: ** The differential output is applicable to LPHCSL which is the default configuration of the board.

* The single-ended output is applicable to LVCMOS which is the default configuration of the board.

Contact IDT if user wants to change termination configuration to support other output signal types.

Orderable Part Numbers

The following evaluation board part numbers are available for order.

Table 9: Orderable Part Numbers

Signal Type Series Resistors:

R79, R80 Series Capacitors:

C19, C20 Resistor Network:

R25, R26, R27, R29, R32

**LPHCSL 332pF Not installed

Signal Type Series Resistors:

R81, R82 Series Capacitors:

C21, C22 Resistor Network:

R38, R42, R43, R44, R45

**LPHCSL 332pF Not installed

Signal Type Series Resistors:

R1 Series Capacitors:

C16

*LVCMOS 33Not installed

Signal Type Series Resistor:

R8 Series Resistor:

Differential Clock Input Not installed Not installed

Single-ended Clock Input Not installed Not installed

Part Number Description

EVK5P35021 Evaluation board with all differential outputs terminated as LPHCSL, Single-ended

terminated as LVCMOS

DISCLAIMER Integrated Device Technology, Inc. (IDT) and its subsidiaries reserve the right to modify the products and/or specifications described herein at any time and at IDT’s sole discretion. All information in

this document, including descriptions of product features and performance, is subject to change without notice. Performance specifications and the operating parameters of the described products are determined

in the independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether

express or implied, including, but not limited to, the suitability of IDT’s products for any particular purpose, an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This

document is presented only as a guide and does not convey any license under intellectual property rights of IDT or any third parties.

IDT’s products are not intended for use in applications involving extreme environmental conditions or in life support systems or similar devices where the failure or malfunction of an IDT product can be reasonably

expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT.

Integrated Device Technology, IDT and the IDT logo are registered trademarks of IDT. Product specification subject to change without notice. Other trademarks and service marks used herein, including protected

names, logos and designs, are the property of IDT or their respective third party owners.

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