KSZ8895 Evaluation Board User’s Guide
Micrel Inc.
Page 15
1/8/2013
4.6.4 Port 5 P5-RMII Jumper Configuration for KSZ8895RQ
Modes
JP10 and JP11
JP41
JP24
JP27
P5-RMII PHY
to MAC mode
with J8 used
Closed either
JP10 or JP11
Either Open (clock mode)
or Close (normal mode).
Note: In both modes, the
50MHz reference clock
can be provided from
PMRXC pin to PMTXC
pin and opposite RMII.
Pin 1-2 Close
JP27 1-2-3
Open
Table 11 Configure for P5-RMII
4.7 MDC/MDIO Interface for MIIM Registers and SMI mode
From MDC/MDIO interface to the KSZ8895, use a USB to MDC/MDIO converter that allows
accessing all of PHY related registers and all of the KSZ8895 registers. The user can easily access
the MDC/MDIO interface using a computer connected to the evaluation board’s USB port interface.
Micrel provides Windows based programs for the user to evaluate for both MIIM and SMI. For the
MIIM software to be used all of PHY related registers, please use the software tool in the folder of
MDC_MDIO MIIM of the software directory. For the SMI software to be used all of registers,
please use the software tool in the folder of MDC_MDIO SMI of the software directory.
To prepare the KSZ8895 evaluation board for MDC/MDIO configuration, please follow these
steps:
1. Copy the Micrel provided software on your computer.
2. Set JP2, JP3 and JP4 as specified in Table 8 for MDC/MDIO configuration.
Table 12 MDC/MDIO Settings for MIIM and SMI
Jumper
Description
Setting
JP1
EEPROM
Open
JP2 EEPROM/MIIM/SMI Close
JP3
MDC for MIIM/SMI
Close
JP4
MDIO for MIIM/SMI
Close
JP8
Serial Bus Config. (PS0)
Open (Close for SMI)
JP9
Serial Bus Config. (PS1)
Open
8.
Connect the computer’s USB port to the KSZ8895 board with a USB port cable.
9.
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.
b). 5 VDC power source from the USB port when JP47 pin 2-3 is closed.
10.
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 in SMI mode.
11.
Open the Windows and navigate to the directory where the Window MDC/MDIO files are
stored. Click its icon to invoke the software.
12.
Program the desired settings using the Micrel MDC/MDIO software. See the software
operation description section for details.
