KSZ8463_eval_bd_user_guide_1.1.docx
Micrel, Inc.
July 17, 2013
Confidential
Rev. 1.1
6/16
JUMPER
FUNCTION
SETTING
DEFAULT
(no jumper)
JP302
High-speed/Low-speed
SPI selection
Pins 1-2 closed: High speed (up to 50 MHz)
Pins 2-3 closed: Low speed (up to 12.5 MHz)
High speed
Serial Bus Mode Selection
SPI Slave
MIIM (MDIO/MDC)
SPI Slave
JP303
Pins 1-2 closed
Pins 1-2 closed
JP304
Pins 2-3 closed
Pins 1-2 closed
JP305
Input Clock Select
[2]
Pins 1-2 closed: 25MHz from X1/X2
Pins 2-3 closed: 50MHz from REFCLK_I
25MHz
Table 1 Strap-In Configuration Jumpers
Notes:
1. This mode select applies only to the MII interface, and thus does not apply to the KSZ8463RL and
KSZ8463FRL which have a RMII interface.
2. Mode “50MHz from REFCLK_I” is an option only for the KSZ8463RL and KSZ8463FRL. The
KSZ8463ML and KSZ8463FML must use mode “25MHz from X1/X2.”
3.1.2 USB Interface (SPI Slave or MDIO)
With the Micrel utility software that runs on a PC, it is possible to access the full register set of the device
through the USB port provided on the evaluation board. Download and install the Windows based
MicrelSwitchPhyTools
software from the Micrel website. It includes two applications:
MicrelSwitchConfigApp.exe and MicrelMDIOConfigApp.exe, plus associated DLL files.
MicrelSwitchConfigApp has a graphical user interface (GUI) and provides access via USB to many of the
KSZ8463 registers via the SPI interface. MicrelMDIOConfigApp and the MDIO interface are of limited use
on the KSZ8463 and are not described further.
When using the USB-to-SPI interface, ensure that the following jumpers are installed: J14 (either pins 1-2
or 2-3), JP34, JP35 and JP79 (all four pairs). Do not install JP32 or JP33.
3.2 Power Supplies
The board requires a single 5V DC supply, which can be provided through a barrel power-supply jack
(J11) or through the USB port. The current requirement is 200mA. When configured for fiber operation,
expect the fiber modules to draw approximately 250mA of additional current per port.
The pin diameter of jack J11 is 2.5mm on early boards, and is 2.1mm on newer boards. 2.5mm plugs are
recommended because they are generally compatible with both jack sizes. A 2.1mm plug, however,
cannot be used with the 2.5mm jack.
JP400 is used for selecting the 5V source to the board. There is a 3.3V regulator on the board supplying
power for the KSZ8463 and other components. A separate on-board voltage regulator is provided for the
optional 2.5V and 1.8V supplies for KSZ8463’s I/O interface (VDD_IO). JP404 and JP406 are used for
VDD_IO selection. JP403 and JP405 must be in place and other options properly selected before
powering up the board.
