Silicon Laboratories Si3454-KIT Manual de usuario

Si3454-KIT

Si3454 EVALUATION KIT USER’SGUIDE

1. Introduction

The Si3454 8-port evaluation kit (Si3454-KIT) is intended for Power over Ethernet (PoE) Power Sourcing

Equipment (PSE) system designers interested in evaluating the 4-port Si3454 PSE controller.

The Si3454 is controlled through an I2C (or SMBus) interface. For convenience in evaluation, a graphical user

interface (GUI) is provided, giving an easy-to-use visual display and control of the Si3454 I2C registers. The

evaluation kit assumes the user has access to a PC to control the evaluation board using the provided GUI.

The user is also responsible for providing an appropriate high-voltage power supply. The power supply should be

45 to 57 V for normal PoE or 51 to 57 V for PoE+. The Si3454 can supply over 30 W to each port. Thus, the two

Si3454 controllers for the 8-port demo system can provide over 240 W of total power. Normally, a 50 to 100 W

power supply is used. While the classification and actual current consumption of each port is available, the demo

GUI interacts with the Si3454 on a per-port basis and does not implement system-level power management.

Contact Silicon Laboratories for more information about system-level power management options.

The Si3454-KIT kit has been thoroughly tested for standards compliance and interoperability. Contact Silicon

Laboratories for test reports using Sifos PoE test equipment and University of New Hampshire PoE standards

compliance and interoperability reports.

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2. Kit Contents

Table 1. Evaluation Kit Contents

Qty Item Contents

1 Si3454-EVB Si3454 8-port evaluation board with connector for an external 50 V

power supply. The power supply must be capable of supplying the

required amount of power for all PoE loads being connected. The board

is populated with Si3454 parts.

1 Si3459CB-EVB RJ-45 connector board configured as Power over Ethernet mid-span

injector with gigabit Ethernet pass-through.

1 RIBBON-20-4 20-wire cable connects the Si3454 evaluation board to the RJ-45 con-

nector board

1 USB-ADAPT-BRD USB to I2C (or SMBus) translator board. This board is preprogrammed to

support I2C transactions. The label on this 2”x 2” board is “PoE USB

Adapter”.

1 S-USB2.06-01 USB cable to connect to a host PC

2 Si3402ISO-EVB Powered Device evaluation board configured to provide a Class 3 signa-

ture.

1 Si3402ISO-C4-EVB Powered Device evaluation board configured to provide a Class 4 signa-

ture.

3 LOADBOARD_REV1_0 Configurable load board.

6 HEXNUT 1/4-32_NIC Nuts for attaching load boards to powered device evaluation boards

1 CON-2-MALE Power connector to fit EVB J3

3 CAT5E-01 Ethernet cable to connect the Si3402 evaluation boards to the connector

board.

1 CD-ROM Software drivers for the USB to I2C adapter and a GUI for the Si3454

registers on a CD-ROM. Applicable notes and data sheets are also

included.

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3. Installation

This KIT contains a PC-based Monitor GUI. Before you can use the Monitor, you must first install the device driver

associated with the PoE USB Adapter card (called “PoEUSB” in this document), then install the Monitor GUI.

3.1. Installing the PoEUSB Device

Note: If you have previously installed the PoEUSB device, uninstall the previous driver version before installing the new ver-

sion. To uninstall the previous version, select “Programs and Features” or “Add or Remove Programs” from the Control

Panel, and then uninstall “Windows Driver Package - Silicon Labs, (WinUSB) MultiportSerial” and similar file names.

Figure 1. Uninstall Previous Revision Windows Driver Package

To install the PoEUSB device driver, run PoEUSBSetup.exe from the documentation that comes with this KIT.

Figure 2. PoE USB Device Installer Screen

After the PoEUSB device driver is installed, then complete the installation by connecting the PoEUSB adapter card

to the PC with a USB cable.

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3.2. Installing the Si3454 & Si3459 Monitor

If you have previously installed the Monitor, uninstall the previous version before installing the new version. To

uninstall the previous version, select “Programs and Features” or “Add or Remove Programs” from the Control

Panel, and then uninstall the outdated application.

Figure 3. Uninstall Previous Rev Si3454 & Si3459 Monitor

To install the Si3454 & Si3459 Monitor, run si3454_si3459_monitor.msi.

Figure 4. Monitor Setup Wizard

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4. Hardware Installation

Figure 5 shows how all the hardware components of the Si3454 evaluation kit fit together.

Figure 5. Evaluation Kit Hardware

Reference Figure 5 for overall system connection. Perform initial setup as follows:

1. Verify that Evaluation Board jumper placements are correct, according to Figure 18 schematic, Figure 6.

“Physical Jumper Placement” and Table 2. On the Connector Board, the default condition occurs when all

jumpers are installed.

2. Connect the Si3454 evaluation card (Si3454-EVB) to the RJ45 (Si3459CB-EVB) card using the 20-pin

ribbon cable.

3. Plug J104 (refer to the silkscreen on the bottom of the board) of the PoEUSB adapter into J2 of the

Si3454-EVB.

4. Connect a 52 V power supply to J3. When the high voltage supply is turned on, the power LED D3 will

indicate that the on-board generated 3.3 V logic supply is active. The power LED location is indicated by

green circles in Figure 6. “Physical Jumper Placement”.

5. Plug the PoEUSB adapter into an available computer USB port if this was not already done during the

software installation step. If the drivers were installed properly, the PC should recognize the adapter.

6. The Si3454 Evaluation Board is configured as a midspan power injector. The data input lines are on the top

row, and the power plus data output lines are on the bottom row. See Figure 7. A Powered Device (PD) is

plugged into the bottom row.

7. Start the Si3454 & Si3459 Monitor.

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Figure 6. Physical Jumper Placement

Table 2. Si3454-EVB Jumper Table

Jumper Function Initial Setting

J1 Si3454 U12 address L,L,L,L

J5 Si3454 U11 address L,L,L,H

J10 Auto mode selection H,H,H,H

JP3 Assert reset from host voltage domain OFF

JP6 Debounce reset from SW1 ON

JP7 Enable buck converter ON (1,2)

JP8 Disable buck converter ON

JP9 Isolate buck components when chained ON

JP10 Isolate buck components when chained ON

JP11 Remove pullup for chained operation ON

JP12 Remove pullup for chained operation ON

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Figure 7. Connector Board Configuration

EVB board connector J8 supports chaining multiple Si3454 boards together to demonstrate and test configurations

with larger numbers of Si3454 devices. Chaining is done with a standard 0.1 inch spacing ribbon cable. Using

jumpers, switching supplies on chained boards should be disabled. Redundant I2C pullups may be disabled as

well. Consult with Silicon Labs applications engineering for further details.

JP13 Force shutdown OFF

JP14 Breaker for isolated Reset line. Remove when

chained and/or PoEUSb is not connected. OFF

Table 2. Si3454-EVB Jumper Table (Continued)

Jumper Function Initial Setting

Port 1

Data in

Port 1

PoE and

Data out

Port 8

Data in

Port 8

PoE and Data out

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5. Using the Si3454 & Si3459 Monitor

To run the Si3454 & Si3459 Monitor, double click on the “Si3454 & Si3459 Monitor” desktop icon. You may also run

the Si3454 & Si3459 Monitor from the Start menu, by selecting: StartAll ProgramsSilicon

LaboratoriesSi3454 & Si3459 Monitor. Figure 8 shows the Si3454 & Si3459 GUI when it is initially opened.

The version of the Si3454 & Si3459 Monitor is displayed at the bottom of the window.

Figure 8. Si3454 & Si3459 Monitor GUI

5.1. Interface Selector

Ensure that the Interface Selector in the lower left of the monitor window indicates “Interface: PoEUSB”. If it shows

“Interface: Dummy”, you have not successfully installed and connected to the PoE USB interface adapter.

Figure 9. Interface Selector

The Interface Selector specifies which USB-to-I2C converter device to use for communicating with the Si3454 PSE

controllers. The Si3454 & Si3459 Monitor supports several different USB-to-I2C converter devices. If more than

one of these devices is connected to the PC at the same time, then the user can select which one to use with the

Interface drop-down box.

The “Dummy” device is a substitute device that does not actually perform I2C communications. The Dummy device

allows the Si3454 & Si3459 Monitor to be opened and perform in an emulation mode even if there are no

USB-to-I2C converter devices connected to the PC.

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5.2. Si3454 & Si3459 Monitor Layout

Along the top are monitor controls. On the left side are Si3454 global identification, power information and settings.

Immediately to the right are events and interrupts. On the right side all the Si3454 registers are individually

accessible. The middle section provides a graphical interface to the Si3454 registers. Changes made in either the

5.3. Monitor Control

The primary purpose of the Monitor Control area is to configure and control the operation of the GUI itself.

Figure 10. Monitor Control Area

The user may manually update the GUI by clicking the “Refresh” button. The GUI reads the Si3454 registers and

updates the displayed information.

The user may cause the GUI to automatically update itself at regular intervals by clicking on the “Start polling”

button. Once pressed, the button text changes to “Stop polling”. The green LED symbol on the Polling button

flashes red each time an update occurs. The “Poll delay” text box allows the user to specify the time between

updates. The user may stop automatic updates by clicking on the “Stop polling” button.

The user selects which Si3454 controller to use with the “Slave addr” box. Several Si3454 controllers may be

connected to the I2C bus. The “Slave addr” box specifies which of the Si3454 controllers to communicate with. The

GUI transacts with only one Si3454 at a time. The user may dynamically switch the GUI between different Si3454s

by selecting a new address in the “Slave addr” box corresponding to the jumper setting on the Si3454-EVB (J1,

J5).

If the user checks the “CoR” (Clear on Read) check box, then the GUI also reads the Si3454's CoR registers when

updating. If the CoR check box is not checked, then the GUI does not read the CoR registers when updating. The

CoR registers are the Global and the Port Event registers. Reading a CoR register has side effects: It clears that

while the GUI is polling, then events could come and go without being noticed by the user.

If the user checks the “RoM” (Read on Modify) check box, then the GUI automatically updates itself after the user

modifies a register via the GUI. The GUI automatically shows the effect of any change within a time delay, specified

by the “RoM delay” text box. The RoM behavior is only useful if polling is stopped.

The Monitor Control area has three buttons. The “SW Reset” button resets the Si3454 by setting the “swrst” bit in

the pb_global register. The “Shutdown low priority ports” button turns off all low priority ports by setting the “lowpri”

bit in the pb_global register. The “HW Reset” button causes a reset pulse to be asserted on the Si3454 Reset pin.

This fully resets all Si3454 devices on the board.

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5.4. Device Information

The Device Information box displays high-level information about the Si3454 device, including hardware revision

and the firmware version.

Note: The example shown in Figure 11 is representative but may not contain the same data as that displayed with your board.

Figure 11. Device Information Box

5.5. Port Boxes

The port boxes display port status and have controls for configuring and controlling the ports. Each port has its own

box.

Figure 12. Port Box

5.5.1. Port Status

A port box displays the results of the last detection and last classification in the lower left. If not polling, the user

may manually update the port detect and classify status by clicking on the “R” (read) button.

Port voltage and current are displayed in the port box upper right corner. If polling is not enabled, then the user may

manually update the port voltage and current reading by clicking on the “Refresh” button.

5.5.2. Port Configuration

A port box contains four radio buttons to configure the mode of the port. The port mode may be Shutdown, Manual,

Semi-auto, or Auto.

The port features can be configured with the four checkboxes on the right pane. If “Disconnect enable” is checked,

the port removes power if the powered device is unplugged. If the “2 event class. enable” is checked, then the

Si3454 will follow the IEEE802.3at Type 2 (2-event) classification method for PDs presenting Class 4 signature

during the first event. The “2-event class” LED is lit when the Type 2 classification is successful.

The “Type2Fault” provides additional status information about the classification. The “FET Bad” LED is lit when the

external FET is damaged.

The following steps detail how a port can be manually turned on in the IEEE 802.3at Type 2 high-power manner

(see Figure 16 on page 16):

1. Enable detection and classification by checking the “Detect enable” and “Class enable” check-boxes.

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