User`s guide

KSZ8864 Evaluation Board User’s Guide
Micrel Inc. Page 6 5/9/2014
FIFO, Flow Control, VLAN Tagging, Priority
USB
Device
USB
Port
EEPROM
Port 1 Port 2
Port 3
RMII
Port 4
RMII
Mag 1
Port 4
MII
5 VDC
Jack
3.3V
Regulator
1.2V
Regulator
Reset
Button
KSZ8864
Mag 2
Port 3
MII
Figure 2 KSZ8864 Evaluation Board Block Diagram
4.1 Strap in Mode
Strap in configuration mode is the quickest and easiest way to get started. In this mode, the
KSZ8864 acts as a standalone unmanaged 4-port switch. 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 KSZ8864 default configuration. Section 4.1.1
covers each jumper on the board and describes its function.
To start in strap in configuration mode, make sure that JP1 and JP2 are closed and JP3, JP4, JP8 and
JP9 are open. In this mode, pins (PS1,PS0)=(0,0), the chip will start automatically, after trying to