Configuration
2016 Microchip Technology Inc. DS50002449A-page 23
TABLE 2-2: STRAPPING RESISTOR OPTIONS FOR PRODUCTION SILICON
2.14 MDIO/MDC SOFTWARE UTILITY AND FTDI CABLE
ethutil.exe is a free Windows command line utility from Microchip for access to the
KSZ8061 MII management interface (MDIO/MDC) using the USB cables described in
Section 2.9 “10-Pin Header (J7)”. Contact your Microchip sales representative for
information on how to download this utility and the accompanying user guide. The user
guide provides instructions on installing and using this utility.
When the KSZ8061 and KSZ8081 are both powered and connected to the MII man-
agement interface (MDIO/MDC), the ethutil.exe utility will automatically configure itself
for the highest address PHY, which by default is the KSZ8081 at address 3. Use the
“address” command, as shown in Figure 2-10, to switch to the KSZ8061 PHY.
FIGURE 2-10: ETHUTIL.EXE UTILITY - OPENING SCREEN AND ADDRESS COMMAND
If the KSZ8081 is removed, disabled or if power is disconnected, then the utility will
automatically configure itself for the KSZ8061 instead of the KSZ8081. This is shown
in Figure 2-11.
Resistor Strapping Function Resistor not Installed Resistor Installed
[R38, R37, R36] PHY Address Address = b’001 Any other address
[R41, R40, R39] Configuration b’000 = Normal MII mode,
Auto-MDI/MDI-X disabled
b’010 = Normal mode,
Auto-MDI/MDI-X enabled
b’110 = Back-to-back,
Auto-MDI/MDI-X enabled
R42 Quiet-WIRE
®
Filtering Enabled Disabled
R43 NAND Tree Disabled Enabled
R44 Auto Negotiation Disabled Enabled
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