Datasheet

MAX5980 Evaluation Kit
Evaluates: MAX5980
5Maxim Integrated
13) Start the EV kit software by opening its icon in the
Start | Programs menu.
14) Observe as the program automatically detects
the USB interface circuit, starts the main program,
and then automatically detects the I
2
C-compatible
address configured for the IC.
15) Select the BitMap Controls tab at the top.
16) Load and run the POWER_ON.SMB macro program
from the File | Open | Run Macro menu. The script
automatically runs after selecting open.
17) All four network port’s green status LEDs should be lit.
18) Three other example macros allow quick testing of the
manual mode, auto mode, semiauto mode, and with
DC load disconnect detection. These macros are:
a. TEST#1_MANUAL_MODE.SMB
b. TEST#2_AUTO_MODE_DC.SMB
c. TEST#4_SEMIAUTO_MODE.SMB
19) Read the embedded comments in each macro for
detailed descriptions using a plain text editor.
20) Test point VEE (U1 VEE pin) and GND test points
are provided throughout the PCB to observe desired
signals with an oscilloscope or voltmeter. Use an
isolated oscilloscope for probing with respect to
VEE and DGND.
21) Header JU9 is provided to monitor the I
2
C signals
on the U1 side. These signals are not isolated and
are referenced to DGND. DGND and VEE are
shorted by a 0I resistor (R19). AGND and GND
are shorted by a 0I resistor (R68).
22) Pressing the reset pushbutton turns off power to all
ports and returns the IC to the operation mode.
Note: An uninstall program is included with the software.
Click on the UNINSTALL icon to remove the EV kit soft-
ware from the hard drive.
Detailed Description of Software
Text in bold indicates user-selectable features in the
EV kit software. Use the mouse or the keyboard’s Tab
key to navigate various items on the main window. The
EV kit software features the Configuration, Events and
Status, and BitMap Controls tab sheets. Most of the
main window’s available functions can be evaluated by
using the pull-down menu. The bottom-left status bar pro-
vides the USB interface circuit status. The center status
bar provides the current EV kit and macro engine status.
Software Startup
The EV kit software starts in the program’s Auto Read
state. The software automatically detects the Slave
Address and begins reading the contents of each reg-
ister from the IC, updating each tab sheet. The software
then starts up with the Events and Status tab (Figure 1)
for reading system and port events/status information.
Events and Status Tab
The Events and Status tab sheet contains the EV kit’s
system and port events/status information obtained from
the IC registers. The System Events and Status group
box provides system-level information on the VEE and
VDD (VDIG) power supplies, over temperature, and the
present operating mode and address in hexadecimal
and decimal formats. The Port Events group box pro-
vides each PSE port event or change status, including
each port’s power MOSFET (FET_). The Port Status
group box provides each PSE port operating status dur-
ing detection, classification, current, and voltage usage
by the connected PD.
Configuration Tab
The Configuration tab sheet (Figure 2) provides a high-
level method of configuring the EV kit as a 4-port PSE.
System and port-level configurations can be made in this
window. Additionally, the IC or a specific port can be
immediately reset using the respective Reset button. All
other configuration changes on this window take place
after the Update MAX5980 button has been pressed.
To view a specific port event or status after updating,
select the Events and Status tab. Each ports’ operating
mode, disconnect mode, detection/classification, and
various power settings can be set independently. After
configuring the port or making system changes, press
the Update MAX5980 button to write these changes to
the IC, thus updating the EV kit’s respective PSE port.
Certain configurations may not be enabled, depending
on the IC’s current state or status.
BitMap Controls Tab
The BitMap Controls tab sheet (Figure 3) provides a bit-
level method for configuring the EV kit as a 4-port PSE
and for controlling the software state, configuring the IC
registers, using the macro engine, and displaying all the
registers in binary and hexadecimal format.
The IC’s register contents are placed in the appropriate
line of the Reg Read tables in binary and hexadecimal
format. If data changes between the next register read,
the updated register hexadecimal data is displayed in
red and blinks four times. The blink rate can be changed
using the Commands | Red Hex Data Blink Rate menu
item. The bottom-left status bar provides the USB inter-
face circuit status. The center status bar provides the
current EV kit and macro engine status.