User`s guide

KSZ8864 Evaluation Board User’s Guide
Micrel Inc. Page 13 5/9/2014
4.6.4 Port 3 SW3-RMII Jumper Configuration for KSZ8864
Modes JP42 JP41 JP24 JP27
SW3-RMII
MAC to MAC
mode with J6
used
Closed Either Open (clock mode)
or Closed (normal mode).
Note:
When normal mode is
used, port 4 SW4-RMII
SM4TXC should receive
an external 50MHz clock,
and then SM3RXC can
provides 50MHz clock to
SM3TXC and port 3
opposite RMII. Whatever
clock or normal mode,
the port 3 opposite RMII
must receive 50MHz
reference clock.
Pin 1-2 Close Pin 1-2-3
Open
SW3-RMII
MAC to PHY
mode with J7
used
Closed Either Open (clock mode)
or Closed (normal mode).
Note:
When normal mode is
used, port 4 SW4-RMII
SM4TXC should receive
an external 50MHz clock,
and then SM3RXC can
provides 50MHz clock to
SM3TXC and port 3
opposite RMII. Whatever
clock or normal mode,
the port 3 opposite RMII
must receive 50MHz
reference clock.
Pin 1-2 Close Pin 1-2-3
Open
Table 10 Configure for SW3-RMII
4.7 MDC/MDIO Interface for MIIM Registers and SMI mode
From MDC/MDIO interface to the KSZ8864, use a USB to MDC/MDIO converter that allows
accessing all of PHY related registers and all of the KSZ8864 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 2000/XP based programs for the user to evaluate both MIIM and SMI.
For the MIIM software to be used all of PHY related registers, please use the software tool in the