KSZ8895 Evaluation Board User’s Guide
Micrel Inc.
Page 11
1/8/2013
4.3 SPI Mode
From SPI interface to the KSZ8895, use a USB to SPI converter that allows accessing all of the
KSZ8895 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 2000/XP based
program for the user to evaluate the KSZ8895’s full feature set. In addition to all the control
registers available via EEPROM programming, a host CPU connected to the KSZ8895’s SPI
interface will be able to access all static MAC table, the VLAN table, dynamic MAC address table
and the MIB counters.
To prepare the KSZ8895 evaluation board for SPI mode configuration follow these steps:
1. Copy the Micrel provided SPI interface software on your computer.
2. Set JP9 as specified in Table 4 for SPI mode configuration.
Table 4 SPI Mode Settings
Jumper
Description
Setting
JP1
EEPROM
Open
JP2 EEPROM
Open
JP3 MDC
Open
JP4 MDIO
Open
JP8
Serial Bus Config. (PS0)
Open
JP9
Serial Bus Config. (PS1)
Closed
3.
Connect the computer’s USB port to the KSZ8895 board with a USB port cable.
4.
There are two ways to power up the evaluation board:
a). Connect the 5 VDC power supply to the KSZ8895 when JP47 pin1-2 is closed (default).
b). 5 VDC power source from the USB port when JP47 pin 2-3 is closed.
5.
The KSZ8895 will power up initial default configuration with the start switch in register 1 bit 0
= ‘0’ which means the switch is “off”. You can set the bit 0 =’1’ to start switch.
6.
Open the Windows and navigate to the directory where the Window SPI file is stored. Click its
icon to invoke the software.
7.
Program the desired settings using the Micrel SPI interface software. See the software
operation description section 5.2 for details.
4.4 10/100 Ethernet Ports
There are five 10/100 Ethernet ports on the KSZ8895 evaluation board. The ports J1, J2, J3, J4 and
J5 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
J5 = RJ45 connector for port 5
