Silicon Laboratories Si3454-KIT User Manual
Si3454-KIT
Si3454 EVALUATION KIT USER’S GUIDE
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.
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The Si3454 is controlled through an I
interface (GUI) is provided, giving an easy-to-use visual display and control of the Si3454 I
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.
C (or SMBus) interface. For convenience in ev aluation, a graphical user
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C registers. The
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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
2
1 USB-ADAPT-BRD USB to I
support I
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.
C (or SMBus) translator board. This board is preprogrammed to
2
C transactions. The label on this 2”x 2” board is “PoE USB
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 CA T5E-01 Ethernet cable to connect the Si3402 evaluation boards to the connector
board.
2
1 CD-ROM Software drivers for the USB to I
registers on a CD-ROM. Applicable notes and data sheets are also
included.
C adapter and a GUI for the Si3454
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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 Re move 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, th en comp le te 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.
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Figure 4. Monitor Setup Wizard
4. Hardware Installation
Figure 5 shows how all the hardware components of the Si3454 evaluation kit fit together.
Si3454-KIT
Figure 5. Evaluation Kit Hardware
Reference Figure 5 for overall system connection. Perform initial setup as follows:
1. Verify th at 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 Deboun ce 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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Port 1
Data in
Port 1
PoE and
Data out
Port 8
Data in
Port 8
PoE and Data out
Table 2. Si3454-EVB Jumper Table (Continued)
Jumper Function Initial Setting
JP13 Force shutdown OFF
JP14 Breaker for isolated Reset line. Remove when
chained and/or PoEUSb is not connected.
Figure 7. Connector Board Configuration
OFF
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 I
well. Consult with Silicon Labs applications engineering for further details.
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C pullups may be disabled as
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5. Using the Si3454 & Si3459 Monitor
To run the Si3454 & Si3459 Monitor, double click o n the “Si345 4 & Si3459 Monitor” d esktop icon. You m ay also run
the Si3454 & Si3459 Monitor from the Start menu, by selecting: StartAll ProgramsSilicon
LaboratoriesSi3454 & 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-I
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 I
allows the Si3454 & Si3459 Monitor to be opened and perform in an emulation mode even if there are no
USB-to-I
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C converter devices connected to the PC.
2
C converter devices. If more than
2
C communications. The Dummy device
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5.2. Si3454 & Si3459 Monitor Layout
Along the top are monitor controls. On the left side are Si3454 global identification, powe r infor mation a nd 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
register or graphical view are instantly updated in the other view.
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 I
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
register and clears the associated event bit in the interrup t re gister. Consequently, if the CoR check box is checked
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 with in 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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C bus. The “Slave addr” box specifies which of the Si3454 controllers to communicate with. The
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5.4. Device Information
The Device Information box displays high-level information about the Si3454 device, including hardware revi sion
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 Shut down, 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 checke d, 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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2. Enable the 2 event classification by checking the "2 event class. enable" check box.
3. Watch for a successful 2 event classification by checking the state of the “2-event class.” LED
4. Once the classification is successful, set the Ilim to 850 mA
5. Set the proper Icut limit (see below) according to the available power
6. Turn on the port using the “On” pushbutton.
If “Low priority” is checked, the port immediately removes power if the “Shutdown low priority ports” button is
clicked. If “Legacy enable” is checked, then the port supplies power to a legacy powered device even though the
powered device does not provide a valid detection resistance. The “Legacy enable” check box supports
compatibility with certain older PD devices. Please consult the Si3454 data sheet for details. Checking “Midspan
backoff” allows selection of midspan type Alternative B detection back-off timing.
The user may configure a port's Icut level with the “Icut (mA)” drop-down box. The port automatically removes
power if the port current is greater than the Icut level for more than 60 ms.
5.5.3. Port Control
A port box contains three buttons for controlling a port. The “On” button forces a port to supply power; the “Off”
button forces a port to remove power, and the “Reset” button resets a port. Detect and Class buttons force a single
detection or classification operation.
5.6. Interrupts and Events
The Si3454 detects multiple events based on state of the device in general and its ports. Events may be
configured to generate interrupts. The GUI displays even t s, allows individual interrupt s to be enable d and disable d,
and displays the status of interrupts.
5.6.1. Interrupt Enable
The Interrupt Enable box shown in Figure 13 specifies which events cause the Si3454 to generate an interrupt.
If the interrupt line is active, the Interrupt Line Active bar at the bottom of the Interrupts box is bright red instead of
dark red. Note that if there are m ultiple Si3454 controllers in the system, one or more of these controllers may be
pulling the interrupt line low. It may not be the currently-selected Si3454 that is making the interrupt line active.
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Figure 13. Interrupt Enable and Events Boxes
5.6.2. Events
The Events box shown in Figure 13 displays the status of the interrupt line and the port events. The GUI events
section indicates both global and port-specific events. Each events register consists of a pair of read-only (RO),
and clear-on-read (CoR) registers with the same event bits. Reading the RO register obtains the bit values but
does not affect the bits. Reading the CoR register obtains the values of the bits, and also clears the bits in both the
RO and CoR registers. The indicators in the GUI Events section show the values from the RO register if the RO
register is read by push of the “R” button or by polling.
Events enabled to cause an interrupt will propagate to the interrupt active indicator, but will only be reflected in the
remainder of the GUI when the RO registers are read. For the best real-time view of the Si3454 events bits, it is
recommended to enable polling.
5.7. Register List
The Register List shown in Figure 14 displays the contents of the Si3454 registers and allows the user to change
the register contents.
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