National Semiconductor SD303EVK Manual de usuario

SD303EVK / SD307EVK

LMH0303 / LMH0307

Evaluation Board User Guide

National Semiconductor

EVK User Manual

February 3, 2010

Overview

The SD303/SD307 Evaluation Kit (EVK) enables evaluation of the LMH0303 3G/HD/SD SDI Cable Driver with

Cable Detect or the LMH0307 3G/HD/SD SDI Dual Cable Driver with Cable Detect. A graphical user interface

allows managing the SMBus registers of the LMH0303 or LMH0307 device.

Evaluation Kit (SD303EVK / SD307EVK) Contents

The EVK contains the following parts:

•SD303/SD307 EVK board assembly with either the LMH0303 or LMH0307 cable driver

•USB cable

•SD303/SD307 EVK User Guide

Evaluation Board Description

The evaluation board comes in two versions, depending on the cable driver installed:

1) SD303 with the LMH0303 cable driver

2) SD307 with the LMH0307 dual cable driver

The two cable drivers share the same evaluation board (SD303/SD307). The SD303/SD307 evaluation board silk

screen shows the LMH0307 pin name terminology. Table 1 shows the pin name differences between the LMH0307

and LMH0303. The LMH0303 has a single output channel, SDO/SDO

¯¯¯¯ . The LMH0307 has that same output

channel and refers to it as SDO0/SDO0

¯¯¯¯¯ . In addition, the LMH0307 adds a second output channel: SDO1/SDO1

¯¯¯¯¯ .

Table 1. LMH0307 and LMH0303 Pin Name Comparison

Reference LMH0307 Name LMH0307 Description LMH0303 Name LMH0303 Description

J3 SDO0 Channel 0 true output SDO True output

J4 SDO0¯¯¯¯¯ Channel 0 complement output SDO¯¯¯¯ Complement output

J5 SDO1 Channel 1 true output

J6 SDO1¯¯¯¯¯ Channel 1 complement output

D9 TF0P SDO0 Termination Fault TFP SDO Termination Fault

D10 TF0N SDO0¯¯¯¯¯ Termination Fault TFN SDO¯¯¯¯ Termination Fault

D8 TF1P SDO1 Termination Fault

D7 TF1N SDO1¯¯¯¯¯ Termination Fault

Figure 1 shows the SD303/SD307 evaluation board.

SD303/SD307 EVK User Guide 1 of 27

Figure 1. SD303/SD307 Evaluation Board

SD303/SD307 EVK User Guide 2 of 27

SDI Input and SDO Output

The SDI input connectors (J1 and J2) are 50ΩSMA connectors. The SD303/SD307 is initially configured for 100Ω

differential input. To configure the SD303/SD307 for 50Ωsingle-ended input, remove R28 and place 49.9Ω0402

resistors in R9 and R10. When using only one input, the other input should be terminated with a 50ΩSMA

termination.

The SDO output connectors (J3 and J4 for the SD303; and J3, J4, J5, and J6 for the dual output SD307) are 75Ω

BNC connectors. When using only one side of an output pair, the other side should be terminated with a 75ΩBNC

termination. For example, when only using SDO0 on the LMH0307, SDO0

¯¯¯¯¯ should be terminated with a 75ΩBNC

termination.

DC Power Connectors and USB Connector

The red and black binding posts (J8 and J9) provide power for the LMH0303/LMH0307 device, and the USB

connection provides power for the remaining board functions, including the microcontroller and the LEDs. For

proper operation, the SD303/SD307 should first be powered with a DC input voltage (between J8 and J9) of

3.3V ± 5% (3.6V maximum), and then the USB cable should be connected between the evaluation board and

the PC. The POWER LED will flash Red while the board is powered from the 3.3 VDC supply alone, and then

change to solid Green once the USB cable is connected to the PC. The POWER LED will remain Green as long as

the board is powered correctly.

JP1 – LMH0303/LMH0307 Jumper Connection to Microcontroller

A jumper block should be placed on JP1 to connect the LMH0303/LMH0307 pins to the microcontroller. The ALP

software will not function correctly if this jumper block is not in place. Separate jumpers may be used, but they

must be placed to connect the following pins of JP1: RSTI

¯¯¯¯ (pins 5-6), ENABLE (pins 7-8), SDA (pins 9-10), SCL

(pins 11-12), SD/HD (pins 13-14), FAULT

¯¯¯¯¯¯ (pins 15-16), and RSTO

¯¯¯¯¯ (pins 17-18). This jumper block (or individual

jumpers) may be removed to control the LMH0303/LMH0307 pins externally, but then the microcontroller will no

longer be able to communicate with the cable driver.

Controls and Indicators

ENABLE

The ENABLE push button switch controls ENABLE, and the ENABLE LED shows its state. The ENABLE LED is

Green when the cable driver is enabled (ENABLE = 1), and Red when the cable driver is disabled (ENABLE = 0).

When the cable driver is disabled, it enters a deep power down mode, and Termination Fault detection and LOS

¯¯¯¯

detection no longer function.

If the LOSEN register bit (bit 4 of register 05h) is set, then the cable driver can be disabled with LOS

¯¯¯¯ detection still

functioning. With LOSEN set, LOS

¯¯¯¯ is combined with the ENABLE functionality. In this mode, disabling the device

by pushing the ENABLE switch will still power down the device completely (including powering down Termination

Fault detection and LOS

¯¯¯¯ detection), but if ENABLE is left active and the signal is removed from the input, the

device will power down with the LOS

¯¯¯¯ detection still functioning. When the input signal is reapplied, the device will

power back on.

SD/HD

The SD/HD push button switch controls SD/HD, and the SD/HD LED shows its state. The SD/HD LED is Green

when the cable driver is configured for HD/3G edge rates (SD/HD = 0), and Red when the cable driver is configured

for SD edge rates (SD/HD = 1). The default setting for the SD/HD LED is Green for HD/3G edge rates.

SD303/SD307 EVK User Guide 3 of 27

RSTI

¯¯¯¯

The RSTI

¯¯¯¯ push button switch controls RSTI

¯¯¯¯ , and the RSTI

¯¯¯¯ LED shows its state. RSTI

¯¯¯¯ is used to reset the cable

driver to its default register settings. The RSTI

¯¯¯¯ LED is Green during normal operation (RSTI

¯¯¯¯ = 1), and Red when

the cable driver is held in reset (RSTI

¯¯¯¯ = 0). To reset the device, the RSTI

¯¯¯¯ switch must be pushed twice to fully

toggle reset: once to put the device in reset mode (RSTI

¯¯¯¯ = 0), and again to resume normal operation (RSTI

¯¯¯¯ = 1)

with the default register settings.

RSTO

¯¯¯¯¯

The RSTO

¯¯¯¯¯ LED shows the state of RSTO

¯¯¯¯¯ . The RSTO

¯¯¯¯¯ LED is normally Red to indicate RSTO

¯¯¯¯¯ = 0. RSTO

¯¯¯¯¯ is the

reset output used when daisy chaining multiple cable drivers on the same SMBus. After writing a new device

address to register 00h (the ID register), the RSTO

¯¯¯¯¯ LED changes to Green to indicate RSTO

¯¯¯¯¯ = 1. RSTO

¯¯¯¯¯ remains

high until the device is reset with RSTI

¯¯¯¯ .

Termination Faults (TFxx)

The Termination Fault LEDs show the state of the Termination Faults on the cable driver outputs. The Termination

Fault LEDs are Green to indicate proper termination, Red to indicate improper or missing termination, and off to

indicate the Termination Faults are not valid under the current cable driver conditions.

The cable driver must be enabled and must have a valid input signal in order to properly detect cable termination

on the output. If no signal is detected and the LOS

¯¯¯¯ LED is Red, then the Termination Fault detectors (TF1P, TF1N,

TF0P, and TF0N for the LMH0307) cannot determine the state of the output termination and the LEDs will be off.

When a valid input signal is applied, the Termination Fault detectors will show the correct state of their termination.

If the cable driver is disabled or if the output channel is powered down, the Termination Fault LEDs will be off.

LOS

¯¯¯¯

The LOS

¯¯¯¯ LED shows the status of the input signal detector. The LOS

¯¯¯¯ LED is Green to indicate a valid input

signal (LOS

¯¯¯¯ = 1), and Red when no signal is detected (LOS

¯¯¯¯ = 0). When the cable driver is disabled (ENABLE = 0),

the LOS

¯¯¯¯ detection is disabled as well and the LOS

¯¯¯¯ LED will be Red to indicate no signal can be detected. If the

LOS

¯¯¯¯ LED is Red, then the Termination Fault detection does not function and the TFxx LEDs are forced off.

With the LOSEN register bit (bit 4 of register 05h) set, the LOS

¯¯¯¯ detection may still function while the cable driver is

disabled. In this mode, LOS

¯¯¯¯ is combined with the ENABLE functionality, and if the input signal is removed then the

cable driver will power down but keep the LOS

¯¯¯¯ detection running. The device will power back on once an input

signal is detected. (While in this mode, disabling the device by pushing the ENABLE switch will still power down

the device completely, including powering down Termination Fault and LOS

¯¯¯¯ detection).

LEDs and Push Button Switches Summary

Table 2 shows a summary of the LEDs provided to assist the user in determining the configuration of the board,

and Table 3 shows a summary of the push button switches provided to allow control of the board functions.

SD303/SD307 EVK User Guide 4 of 27

Table 2. SD303/SD307 LED Indicators

LED Reference Default

after

Reset * Function when GREEN Function when RED Function when OFF

D1 POWER Green POWER=1, board powered When flashing Red, indicates

the 3.3 VDC supply is

connected but the USB is not Board not powered

D2 ENABLE Green ENABLE=1, device enabled ENABLE=0, device powered

down N/A

D3 SD/HD Green SD/HD=0, HD/3G mode SD/HD=1, SD mode N/A

D4 MODE Off N/A N/A No function, LED always off

D5 RSTO¯¯¯¯¯ Red RSTO¯¯¯¯¯ =1 RSTO¯¯¯¯¯ =0 N/A

D6 RSTI¯¯¯¯ Green RSTI¯¯¯¯ =1, normal operation RSTI¯¯¯¯ =0, device held in reset N/A

D7 TF1N Off

TF1N=0, SDO1¯¯¯¯¯ properly

terminated TF1N=1, Termination Fault on

SDO1¯¯¯¯¯

Termination Fault not valid

(channel is powered down or

no input signal detected)

D8 TF1P Off

TF1P=0, SDO1 properly

terminated TF1P=1, Termination Fault on

SDO1

Termination Fault not valid

(channel is powered down or

no input signal detected)

D9 TF0P Off

TF0P=0, SDO0 properly

terminated TF0P=1, Termination Fault on

SDO0

Termination Fault not valid

(channel is powered down or

no input signal detected)

D10 TF0N Off TF0N=0, SDO0¯¯¯¯¯ properly

terminated TF0N=1, Termination Fault on

SDO0¯¯¯¯¯

Termination Fault not valid

(channel is powered down or

no input signal detected)

D11 LOS¯¯¯¯ Red LOS¯¯¯¯ =1, signal detected at

input LOS¯¯¯¯ =0, no input signal

detected N/A

* Shows the default value after the board is reset (or initially powered on) with no input signal.

Table 3. SD303/SD307 Push Button Controls

Control Reference Description

S1 SAVE No function.

S2 RESET¯¯¯¯¯¯ Push to completely reset the board, device, and ALP software.

S3 ENABLE Toggles ENABLE. Push to set ENABLE=0 and power down the device. Push again to set ENABLE=1

and re-enable the device.

S4 SD/HD Toggles SD/HD. Push to set SD/HD=1 and enable SD mode. Push again to set SD/HD=0 and enable

HD/3G mode.

S5 MODE No function.

S6 RSTI¯¯¯¯ Toggles RSTI¯¯¯¯ . Push once to set RSTI¯¯¯¯ =0 and reset the device. Push again to set RSTI¯¯¯¯ =1 and return

to normal operation following the reset.

SD303/SD307 EVK User Guide 5 of 27

Software Setup

System Requirements

Operating System: Windows XP or Vista

USB: 2.0

Installation

Download the latest software from http://www.national.com/analog/interface/sd303_307evk. Extract the

ALPF_monthdayyear_major version_minor version.exe” (ex. ALPF_07312008_125_0016.exe) file to a temporary

location that can be deleted later.

Make sure the evaluation board is not connected to the PC. The following installation instructions are for the

Windows XP Operating System.

Install the ALP software

Execute the ALP Setup Wizard program called “ALPF_monthdayyear_major version_minor version.exe” (ex.

ALPF_07312008_125_0016.exe) that was extracted to a temporary location.

There are 7 steps to the installation once the setup wizard is started:

1. Select the “Next” button.

2. Select “I accept the agreement” and then select the “Next” button.

3. Select the location to install the ALP software and then select the “Next” button.

4. Select the location for the start menu shortcut and then select the “Next” button.

5. There will then be a screen that allows the creation of a desktop and Quick Launch icon. After selecting

the desired choices select the “Next” button.

6. Select the “Install” button, and the software will then be installed to the selected location.

7. Uncheck “Launch Analog LaunchPAD” and select the “Finish” button. The ALP software will start if

“Launch Analog LaunchPAD” is checked, but it will not be useful until the USB driver is installed.

Power on the SD303/SD307 evaluation board with a 3.3 VDC power supply. Numerous LEDs will turn on, and the

POWER LED will flash Red. Connect the PC and the SD303/SD307 evaluation board together with the USB cable.

The POWER LED will stop flashing, and the “Found New Hardware Wizard” will open on the PC. Proceed to the

next section to install the USB driver.

Install the USB driver

There are 6 steps to install the USB driver:

1. Select “No, not at this time” then select the “Next” button.

2. Select “Install from a list or specific location” then select the “Next” button.

3. Select “Search for the best driver in these locations”. Uncheck “Search removable media” and check

“Include this location in the search”.

4. Browse to the Install Directory which is typically located at “C:\Program Files\National Semiconductor

Corp\Analog LaunchPAD\vx.x.x\Drivers” and select the “Next” button. Windows should find the driver.

5. Select “Continue Anyway”.

6. Select the “Finish” button.

The software installation is complete. The POWER LED on the board should turn to solid Green. The ALP

software may now be launched, as described in the next section.

SD303/SD307 EVK User Guide 6 of 27

Software Description

Startup

Make sure all the software has been installed and the hardware is powered on and connected to the PC. Execute

“Analog LaunchPAD” from the start menu. The default start menu location is “Programs\National Semiconductor

Corp\Analog LaunchPAD vx.x.x\Analog LaunchPAD”.

The application should come up in the state shown below (for the LMH0307). If it does not, see “Trouble Shooting”

at the end of this document.

Figure 2. ALP Startup Screen for LMH0307

LMH0303/LMH0307 Profiles

There are separate profiles for the LMH0303 and the LMH0307. The ALP software automatically detects which

device is connected and configures the profile accordingly. There are four application tabs for the

LMH0303/LMH0307 device.

Information Tab

The Information tab is shown in Figure 3 (for the LMH0307).

SD303/SD307 EVK User Guide 7 of 27

Figure 3. LMH0307 Information Tab

LMH0303 and LMH0307 Tab

The LMH0303/LMH0307 tabs present a high level view of the cable driver. Figure 4 shows this tab for the

LMH0307, and Figure 5 shows this tab for the LMH0303.

SD303/SD307 EVK User Guide 8 of 27

Figure 4. LMH0307 Main Tab

Figure 5. LMH0303 Main Tab

SD303/SD307 EVK User Guide 9 of 27

Firmware Version – FW Ver

FW Ver shows the version of the firmware installed on the evaluation board.

Termination Fault

These controls show the default configuration of the HD and SD Termination Fault Threshold registers and also

provide the ability to change the thresholds. The LMH0307 has two pairs of Termination Fault Threshold registers

– one HD/SD pair for each of its two output channels – as shown in Figure 4. The LMH0303 has only one HD/SD

pair of Termination Fault Threshold registers for its single output channel, as can be seen in Figure 5.

Increasing the Termination Fault Threshold settings decreases the cable driver’s sensitivity to Termination Faults.

This is useful if the cable driver is indicating termination faults when the output appears to be properly terminated.

Decreasing the Termination Fault Threshold settings increases the cable driver’s sensitivity to Termination Faults

which is useful for determining cable detection at the end of long cables.

Compare Command and Termination Fault Counters

Compare Command configures the CMPCMD section of the TEST register (08h) on the LMH0303 or LMH0307.

The Termination Fault Counters reflect the current configuration of the TEST register CMPCMD bits.

The Termination Fault Counters provide an indication of how the cable driver is reading the Termination Faults

based on the current Termination Fault Threshold settings. Perfectly terminated outputs should read back “0”, and

unterminated outputs should read back “31”.

Control

Refresh

The Refresh button provides a manual refresh of the state from the evaluation board to the LMH0303/LMH0307 tab.

Changes to the board will not be reflected in the LED icons and Line Control checkboxes on the

LMH0303/LMH0307 tab until the Refresh button is pressed. This can be done automatically by using the Auto

Refresh checkbox.

Auto Refresh Checkbox

The Auto Refresh checkbox provides an automatic refresh of the state from the evaluation board to the

LMH0303/LMH0307 tab once per second. This provides automatic updating of the LED icons and Line Control

checkboxes on the LMH0303/LMH0307 tab to reflect any board changes.

Line Control

Power Down 0 and 1 (LMH0307 only)

Power Down 0 and 1 checkboxes control the PD0 and PD1 power down bits (bits 5 and 6 in register 02h - MASK)

and will selectively power down one or both of the output channels on the LMH0307.

Enable

The Enable checkbox controls the associated ENABLE pin on the LMH0303/LMH0307. Disabling or un-checking

the Enable checkbox will force the LMH0303/LMH0307 into a deep power down mode.

RSTI

The RSTI checkbox controls the RSTI

¯¯¯¯ pin. This checkbox is checked for normal operation, and un-checked to put

the cable driver in reset.

SD303/SD307 EVK User Guide 10 of 27

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