Texas Instruments CDCE 9 Series Manuale utente

User's Guide

SCAU022A–July 2007–Revised July 2010

CDCE(L)9xx Performance Evaluation Module

This user’s guide explains how to use the CDCE(L)9xx Performance Evaluation Module (EVM), which is a

generic PCB that can handle all the CDCE(L)9xx devices. The CDCE9xx is soldered on the PCB for best

performance; therefore, it is necessary to specify the desired device when ordering the EVM. The

assembly of the EVM is slightly different for each member of the family. However, the basic functionality

remains the same.

The following EVMs will be available within summer 2007:

• CDCE949EVM

• CDCE925EVM

• CDCE913EVM

CDCEL9xx versions will follow later.

Contents

1 Block Diagram ............................................................................................................... 2

2 About the CDCE(L)9xx Clock-Generator Family ........................................................................ 3

3 QUICK START (USB PLUG 'N' PLAY) .................................................................................. 4

4 EVM Hardware .............................................................................................................. 5

5 TI ClockPro™ Programming Software ................................................................................... 8

6 Bill of Materials and Schematic .......................................................................................... 17

List of Figures

1 CDCE(L)9xx Simplified Block Diagram (Default Setup) ............................................................... 2

2 CDCEL9xx Printed-Circuit Board ......................................................................................... 3

3 Functional Block Diagram of the CDCE(L)9xx.......................................................................... 4

4 EVM Region Showing SDA Pin and SCL Pin Locations............................................................... 7

5 TI ClockPro™ Start Window............................................................................................... 9

6 TI ClockPro™ Devices Search Window ................................................................................. 9

7 TI ClockPro™ Solution Selection Window ............................................................................. 10

8 TI Clock Pro Main View................................................................................................... 11

9 TI ClockPro™ Direct Register View..................................................................................... 13

10 TI ClockPro™ Bits Viewer – Bit Contents of the Control Register.................................................. 14

11 TI ClockPro™ Pulling Range Calculator ............................................................................... 15

12 TI ClockPro™ Checksum Calculator.................................................................................... 15

List of Tables

1 Bill of Materials............................................................................................................. 17

TI ClockPro, Pro-Clock, ClockPro are trademarks of Texas Instruments.

Bluetooth is a trademark of Bluetooth SIG.

Intel is a trademark of Intel Corporation.

Windows, Excel are trademarks of Microsoft Corporation.

Memory Stick is a trademark of Sony Corporation.

Ethernet is a trademark of Xerox Corporation.

SCAU022A–July 2007–Revised July 2010 CDCE(L)9xx Performance Evaluation Module

CDCE (L)9XX

Universal Family

Footprint 22 W

Series terminated outputs

with option for AC coupling

1.8V

Core

Supply

Selection

1.8V

Output

Supply

Selection

3.3V

Output

Supply

Selection

2 way

solder

bridges

USB

Chip

Peripheral

(FTDI)

D1 D2D3

From Notebook / PC

1.8V LDO

(TI)

3.3V LDO

(TI)

5V 3.3V

SDA / S1

SDA

SCL

J39

(SCL active) J33

(SDA active)

Xin/Clk

Xout

Y1 crystal

(default)

1.8 V

J41

(S0 HIGH)

VCTR

* set J25 to activate serial interface

Open Jumper

Shorted Jumper

(for Default)

J23

(USB Power)

SCL / S2

22 W

Block Diagram

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1 Block Diagram

Figure 1. CDCE(L)9xx Simplified Block Diagram (Default Setup)

1.1 Features

• Easy-to-use evaluation module for fast prototyping and application evaluation, supporting the entire

clock family.

• Easy and fast device programming through TI Pro-Clock™ software

• Evaluation of multiple crystals and reference clocks due to flexible input structure

• EVM completely USB powered in factory default

• Option for USB power and external power supply

• No need for programming or notebook/PC connection

2CDCE(L)9xx Performance Evaluation Module SCAU022A–July 2007–Revised July 2010

www.ti.com

About the CDCE(L)9xx Clock-Generator Family

Figure 2. CDCEL9xx Printed-Circuit Board

1.2 Related Documentation From Texas Instruments

•CDCE949, CDCE(L)949, Programmable, 4-PLL VCXO Clock Synthesizer With 1.8-V and 3.3-V

Input/Outputs data sheet (SCAS844)

• CDCE(L)937 data sheet (Unpublished)

• CDCE(L)925 data sheet (Unpublished)

• CDCE(L)913 data sheet (Unpublished)

•VCXO Application Guidelines for CDCE(L)9xx Family application report (SCAA085)

1.3 If You Need Assistance

If you need assistance with this device, send an e-mail to [email protected].

2 About the CDCE(L)9xx Clock-Generator Family

The CDCE9xx and CDCEL9xx are a family of modular PLL-based, low-cost, high-performance,

programmable clock synthesizers, multipliers, and dividers. They generate from 3 (1-PLL) up to 9 (4-PLL)

output clocks from a single input frequency. A crystal or LVCMOS clock signal is possible as the reference

clock. VCXO functionality is built into every member of the CDCE9xx device family, which allows

synchronizing the output frequency to an external control signal, e.g., a PWM signal.

A deep M/N divider ratio allows the generation of zero ppm audio/video, networking (WLAN, Bluetooth™,

Ethernet™, GPS), or interface (USB, IEEE1394, Memory Stick™) clocks from a 27-MHz reference input

frequency, for example.

SCAU022A–July 2007–Revised July 2010 CDCE(L)9xx Performance Evaluation Module

QUICK START (USB PLUG 'N' PLAY)

www.ti.com

An inbuilt EEPROM cuts off the need for reprogramming the CDCE(L)9xx in a certain application, but

reprogramming is still possible with a 2-wire serial interface. Based on the PLL frequency and the divider

settings, the internal loop filter components are automatically adjusted to achieve high stability and

optimized jitter transfer characteristic of each PLL. Three, free programmable control inputs, S0, S1, and

S2, can be used to select different frequencies, or change SSC setting for lowering EMI, or other control

features like outputs disable to low, outputs 3-state, power down, PLL bypass, etc.

The device has separate output supply pins, VDDOUT, which is 1.8 V for CDCEL9xx and to 2.5 V to 3.3 V

for CDCE9xx.

The following is an overview of the devices of the CDCE(L)9xx family:

• CDCE949/CDCEL949: 4-PLL, 9 outputs, fmax = 230 MHz, industrial temperature range, 24 pins

• CDCE937/CDCEL937: 3-PLL, 7 outputs, fmax = 230 MHz, industrial temperature range, 20 pins

• CDCE925/CDCEL925: 2-PLL, 5 outputs, fmax = 230 MHz, industrial temperature range, 16 pins

• CDCE913/CDCEL913: 1-PLL, 3 outputs, fmax = 230 MHz, industrial temperature range, 14 pins

Figure 3. Functional Block Diagram of the CDCE(L)9xx

3 QUICK START (USB PLUG 'N' PLAY)

The following steps allow the user to get started quickly with the EVM.

1. Connect the EVM with the PC with a 2.0 USB cable.

2. Install the driver software using the provided CD-ROM.

3. The EVM is now running and completely powered through USB. Verify it by checking any of the

4CDCE(L)9xx Performance Evaluation Module SCAU022A–July 2007–Revised July 2010

www.ti.com

EVM Hardware

outputs available at the SMA connectors.

4. Programming the device is also possible using the TI Pro-Clock™ dedicated software (see section

4.2).

4 EVM Hardware

4.1 Hardware Configuration

This section gives an extended description of the board hardware, providing the user with a

comprehensive overview of its configuration. Detailed information regarding onboard jumpers,

solder-bridges, and communication interface (I2C/SMBus) is also provided, allowing the user to change the

setup and play around according to his needs and wishes.

4.1.1 Power Supply

Power for the EVM can be supplied fully not only via the USB but also through a stabilized external power

supply. The following paragraphs describe how to set the board jumpers for both cases. Depending on the

device the user is dealing with (CDCE9xx or CDCEL9xx), a guideline of the jumper’s setup for the output

stage is given.

NOTE: All EVMs are delivered with USB power supply as default.

4.1.1.1 External Power Supply

In order for the board to be supplied with an external power supply generator, follow the instructions

regarding the jumpers’ setup for both the device core and the output stage. The latter depends on the type

of device (CDCE9xx or CDCEL9xx).

Core Supply Voltage

• Insert jumper J47 (leave jumper J46 open).

• Connect the positive pole of the external power supply to P1 and the negative pole to P2 (ground).

Voltage ranges between 1.7 V and 1.9 V (nominal 1.8 V).

• Insert jumpers J23 and J25 and plug in the USB cable (use a 2.0 USB male B termination). Even

though externally supplied, the board needs this connection to allow the programming of the device.

Output Stage Supply Voltage (Either 3.3 V or 1.8 V)

a) CDCE9XX →VDDOUT = 3.3 V

• Insert jumper J44 (leave J43 and J45 open).

• Connect the positive pole of the external power supply to P3 and the negative pole to P2 (ground).

Voltage ranges between 3 V and 3.6 V (nominal 3.3 V).

NOTE: J45→use this jumper to ground Vddout. In this way, the default functionality for the SDA/S1

and SCL/S2 pins is recalled, and the device can be reprogrammed even though these pins

were set to control pins (S1 and S2). Besides, the device default address is also recalled.

Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38, and J40

open).

b) CDCEL9XX →VDDOUT=1.8 V

• Insert jumper J50 (leave jumpers J49 and J51 open).

• Connect the positive pole of the external power supply to P4 and the negative pole to P2 (ground).

Voltage ranges between 1.7 V and 1.9 V (nominal 1.8 V).

SCAU022A–July 2007–Revised July 2010 CDCE(L)9xx Performance Evaluation Module

EVM Hardware

www.ti.com

NOTE: J51→use this jumper to ground Vddout. In this way, the default functionality for the SDA/S1

and SCL/S2 pins is recalled, and the device can be reprogrammed even though these pins

were set to control pins (S1 and S2). Besides, the device default address is also recalled.

Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38, and J40

open).

4.1.1.2 USB Power Supply

In order for the board to be fully supplied via USB, follow the instructions regarding the jumpers’ setup for

both the device core and the output stage. The latter depends on the type of device (CDCE9xx or

CDCEL9xx).

NOTE: All EVMs are delivered with the USB power supply as default.

Core Supply Voltage

• Insert jumper J46 (leave jumper J47 open).

• Insert jumper J23 and J25, and plug in the USB cable (use a 2.0 USB male B termination).

Output Stage Supply Voltage (Either 3.3 V or 1.8 V)

a) CDCE9XX →VDDOUT = 3.3 V

• Insert jumper J43 (leave J44 and J45 open).

NOTE: J45 →use this jumper to ground Vddout. . In this way, the default functionality for the

SDA/S1 and SCL/S2 pins is recalled and the device can be reprogrammed even though

these pins were set to control pins (S1 and S2). Besides, the device default address is also

recalled. Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38,

and J40 open).

b) CDCEL9XX →VDDOUT = 1.8 V

• Insert jumper J49 (leave jumper J50 and J51 open).

NOTE: J51→use this jumper to ground Vddout. In this way, the default functionality for the SDA/S1

and SCL/S2 pins is recalled and the device can be reprogrammed even though these pins

were set to control pins (S1 and S2). Besides, the device default address is also recalled.

Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38, and J40

open).

4.1.2 Programming Interfaces

The device supports nonvolatile EEPROM programming for easy customized applications. Although preset

to a factory default configuration (see the relevant data sheet), it can be reprogrammed to a different

application configuration. All device settings are programmable through the SDA/SCL bus, a 2-wire serial

interface that works according to the I2C standard specification.

Three, free programmable control inputs, S0, S1, and S2, can be used to select different frequencies, or

change the SSC setting for lowering EMI, or other control features like, outputs disable to low, outputs

3-state, power down, PLL bypass, etc.

The device can be programmed externally in two ways:

1. Via the USB cable connected to the PC and to the EVM (in this mode, J39 and J33 are set). TI

Pro-Clock™ software (see section 4) supports the device programming.

2. By an external pattern generator connected to J39 (clock) and J33 (data).

The EVM also offers the opportunity to change the configuration setting of the device by switching the set

of S0, S1, and S2 (see the relevant device data sheet). This can be done by simply inserting and

removing the jumpers by the following description:

6CDCE(L)9xx Performance Evaluation Module SCAU022A–July 2007–Revised July 2010

SDA pin:

Connect

terminal’s

wire here

SCL pin:

Connect

terminal’s

wire here

www.ti.com

EVM Hardware

• S0: Insert J41 to set it HIGH; insert J42 to set it LOW.

• S1: Insert J32 to set it HIGH; insert J34 to set it LOW (always leave J33 open).

• S2: Insert J38 to set it HIGH; insert J40 to set it LOW (always leave J39 open).

4.1.3 Pass Programming Through

This option allows the device to be programmed on your own board, through the CDCE(L)9xx EVM, by

simply connecting the SDA/SCL available pins to your programming interface.

• Insert jumper J23 and J25 and plug in the USB cable (use a 2.0 USB male B termination).

• Connect the SDA wire and the SCL wire as shown in Figure 4. This is a zoomed view of the EVM

region where the jumpers 32, 33, 34, 38, 39, and 40 are placed.

Figure 4. EVM Region Showing SDA Pin and SCL Pin Locations

• Connect the other SDA and SCL wire terminals to your programming interface.

• The setup is ready; communication with the customer onboard device is now possible.

4.1.4 Input

The CDCE(L)9xx can be driven either from a crystal or from an LVCMOS input signal. If a crystal is

connected, the CDCE(L)9xx can act as a crystal oscillator or as a VCXO with integrated PLLs. Two crystal

footprints allow connecting a smaller 4-pin crystal and a larger 2-pin crystal. This eases the evaluation of

different crystals with different footprint and size. The 2-pin crystal (Y1) on the EVM top side is used as

default.

NOTE: The EVM default is a crystal oscillator with 2-pin crystal (Y1). (See Figure 1)

4.1.4.1 Crystal or VCXO

The following steps are necessary to use the EVM with a crystal or VCXO as reference:

1. General 2-pin crystal or VCXO setup

The 2-pin crystal footprint allows evaluating crystals with a larger size. Larger size crystals usually offer

a wider tuning range for the VCXO functionality.

SCAU022A–July 2007–Revised July 2010 CDCE(L)9xx Performance Evaluation Module

TI ClockPro™ Programming Software

www.ti.com

(a) Short pin 1 and 2 of J52.

(b) Short pin 3 and 2 of J4.

(d) Ensure that C1 and C2 are not installed.

2. General 4-pin crystal or VCXO setup

The 4-pin crystal footprint is a universal footprint that allows evaluating different smaller 2- and 4-pin

crystals. Smaller crystals are beneficial, if a simple crystal oscillator without VCXO functionality is

needed. Smaller crystals are usually cheaper and need less board space.

(a) Short pin 2 and 4 of J52.

(b) Short pin 1 and 2 of J4.

(d) Ensure that C1 and C 2 are not installed.

3. VCXO setup

Because the device has an integrated VCXO, it is possible to verify its functionality (pull-ability) using

the VCTR connector (J30). Install an appropriate resistor R6 to adjust the voltage level according to

the need (R5, R6 work together as a voltage divider).

(a) Assemble R5 and C31 (low pass for VCXO) as needed.

(b) R6 and R5 can be used to create a voltage divider for shifting down the control voltage.

4.1.4.2 LVCMOS

CLK_IN is available via jumper J2 for driving the CDCE(L)9xx with an LVCMOS input. In this case, R2 and

R4 can be installed on the EVM. Assembling R2 and R4 with 100 Ωeach matches the 50-Ωtermination of

a signal generator. C4 permits AC coupling to the external signal source. Ensure that the jumper J52 is

shorted between pin 3 and pin 2, which connects J2 (CLK_IN) with pin 1 (CLK) of the device.

4.1.5 LVCMOS Output

The CDCE(L)9xx can drive from three LVCMOS outputs (CDCE(L)913) up to nine LVCMOS outputs

(CDCE(L)949). Most of them are accessible via SMA connectors. All outputs are series terminated with a

22-Ωresistor in series to the output.

For each output routed on the EVM, it is possible to AC-couple it (i.e., Y1). Depending on the application

requirements, install the resistors for adjusting the DC level (for Y1 →R74 and R76). Power this voltage

divider with the wanted voltage supply (either 1.8 V or 3.3 V) by using the dedicated jumper (for Y1 →

J12), and install a capacitor (for Y1 →C23) with a value between 10 nF and 100 nF.

4.1.5.1 Y4 Output

The pin 7 corresponds to the output Y4, and this is valid for the device CDCE(L)925, CDCE(L)937, and

CDCE(L)949. For the CDCE(L)913, this pin serves as VDDOUT. J6, J7, and C28 are set accordingly.

5 TI ClockPro™ Programming Software

The TI ClockPro™ design tool is the evaluation software for the CDCE(L)949, CDCE(L)937, CDCE(L)925,

and CDCE(L)913 clocking family.

The software runs under Windows™ 98, NT, 2000, XP, and Vista. A quick installation is required prior to

use.

After the loading screen, the start window is shown (Figure 5). This initial window called TI ClockPro™

Wizard recommends devices based on the frequencies and conditions required by the user. It is also

possible to skip this window, going directly to the Devices Search Window (Figure 6). The Devices Search

Window allows the user to select the EVM to work with or go to local mode. After pressing OK, the user is

directed to the Main View Window (Figure 8), that offers the capabilities of communicating with the device,

creating new setups, and loading setups in the device. Under the Tools menu option, other views [Direct

Checksum Calculator (Figure 12)] can be accessed.

8CDCE(L)9xx Performance Evaluation Module SCAU022A–July 2007–Revised July 2010

(1) (2) (3)

(5)

(4) (6) (7)

(1) (2)

(3) (4)

www.ti.com

TI ClockPro™ Programming Software

5.1 Loading and Saving a Setup

Saving and loading the setup of the CDCE(L)9xx software can be done in several different ways.

Click File, and select one of the following options to save or load the current setup.

1. Load Setup/Save Setup — loads/saves the setup from/to an encrypted file

2. Load *.txt/Save *.txt — loads/saves the setup from/to a text file. Use this format to view the setup later

with a text editor.

3. Load *.csv/Save *.csv — loads/saves the setup from/to a comma-delimited file. Use this format to view

the setup later with Microsoft™ Excel™.

4. Load Intel™ Hex*.hex/Save Intel Hex*.hex — loads/saves the setup from/to hexadecimal object file

format. Usually, programmers can directly read-in this file format.

5. Configuration Code Release Sheet — use this option to order factory-programmed EEPROM specials

of the CDCE(L)9xx. Contact your regional TI marketing or sales representative for further information.

Figure 5. TI ClockPro™ Start Window

1. Setup Name. Customized level that refers to the set of solutions that the wizard can generate

2. fin(MHz). User's input frequency in MHz

3. No of Outputs. Number of outputs to generate out of the input frequency introduced in (2)

4. Spread Spectrum. If the outputs require spread spectrum, checking this option allows the customer to

introduce the SSC settings per output.

5. Output conditions. This group of controls allows the user to introduce output frequency in MHz and if

required SSC Conditions (offset and percentage)

6. Skip button directs the user to device selection window (Figure 6)

7. Generate Setup button recommends devices that generate out of fin the fout conditions introduced by

the user. The solutions are listed in the window (Figure 7)

Figure 6. TI ClockPro™ Devices Search Window

1. Select Device chooses the device to work with. When an EVM is connected, it appears as a first

option. Nonconnected options (local mode) are also available.

2. It is green when an EVM is connected. It is black when working in local mode (no data is transferred to

the EVM).

3. OK button directs to the Main View (Figure 8), or if Generation Setup button was pressed on the

SCAU022A–July 2007–Revised July 2010 CDCE(L)9xx Performance Evaluation Module

(1)

(2)

(3)

(4) (5)

TI ClockPro™ Programming Software

www.ti.com

Wizard Window, it directs to the Solution Selection Window (Figure 7).

4. Refresh updates the choices in (1).

Figure 7. TI ClockPro™ Solution Selection Window

1. Solution Selection selects the solution to view when pressing the button View Setup (3). Many

different solutions can be generated by different combinations of the devices and the input stage.

2. Device Selection chooses the initial setup to load in the Main View (Figure 8).

3. View Setup loads the selected device for the selected solution in the Main View (Figure 8).

4. Skip button skips loading a solution showing the Main View (Figure 8).

5. Back button goes back to the Wizard View (Figure 5).

10 CDCE(L)9xx Performance Evaluation Module SCAU022A–July 2007–Revised July 2010

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