KSZ8795 Evaluation Board User’s Guide
Micrel Inc.
Page 6
1/28/2015
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USB
Device
USB
Port
Port 1
Port 2
Port 3
Port 4
SW5-GMII/RGMII
Mag 1
Mag 2
12 VDC
Jack
3.3V
Regulator
1.2V
Regulator
Reset
Button
KSZ8795
Mag 3
Mag 4
KSZ9031
PoE PSE
Circuit
LED
Figure 2 KSZ8795-POE-EVAL Board Block Diagram
4.1 Strap in Mode
Strap in configuration mode is the quickest and easiest way to get started. In the default mode, the
KSZ8795 acts as a stand-alone 4 port switch and one RGMII up-link. The user has to simply set the
board’s configuration jumpers to the desired settings and apply power to the board. The user can
also change jumper settings while power is applied to the board and press the convenient manual
reset button for the new settings to take effect. Note that even if there is no external strap in values
are set, internal pull up and pull down resistors will set the KSZ8795 default configuration. Section
4.1.1 covers each jumper on the board and describes its function.
The KSZ8795 will start automatically after power up or reset.
