KSZ8795 Evaluation Board User’s Guide
Micrel Inc.
Page 8
1/28/2015
4.3 SPI Mode
From SPI interface to the KSZ8795, use a USB to SPI converter that allows accessing all of the
KSZ8795 features and registers. The user can easily access the SPI interface using a computer
connected to the evaluation board’s USB port interface. Micrel provides a Windows GUI based
program for the user to evaluate the KSZ8795’s full feature set. KSZ8795’s SPI interface will be
able to access all static MAC table, the VLAN table, dynamic MAC address table, the MIB
counters and all enhanced features.
To prepare the KSZ8795CLXD-EVAL board for SPI mode configuration follow these steps:
1. Copy the Micrel provided SPI interface software on your computer.
2. KSZ8795-POE-EVAL board is fixed at SPI slave mode.
3.
Connect the computer’s USB port to the KSZ8795CLXD-EVAL board with a USB port cable.
4.
Connect the 12V DC power supply to J7 of the KSZ8795-POE-EVAL board.
5.
Open the Windows and navigate to the directory where the Window SPI file is stored. Click its
icon to invoke the software.
6.
Program the desired settings using the Micrel SPI interface software. See the software
operation description section for details.
4.4 10/100 Ethernet Ports
There are five 10/100 Ethernet ports on the KSZ8795-POE-EVAL board. The ports J1, J2, J3 and
J4 are the standard RJ45 connectors and using CAT-5 cables. Each port can be used as either an
uplink or downlink. All ports support Auto-MDI/MDIX, so there is no need for cross over cables.
J1 = RJ45 connector for port 1
J2 = RJ45 connector for port 2
J3 = RJ45 connector for port 3
J4 = RJ45 connector for port 4
JM1, JM2, JM3, JM4 and JS1, JS2, JS3, JS4 special connectors for Automotive used only.
4.4 10/100/1000 Gigabit Ports
There is one KSZ9031RNX with 10/100/1000 Ethernet ports on the KSZ8795-POE-EVAL board.
The ports RJ1 is the standard RJ45 connectors for port 5 and can connect to one Gigabit port of a
processor platform by using CAT-5 cables. The port supports Auto-MDI/MDIX, so there is no need
for the cross over cables.
RJ1 = RJ45 connector for port 5
