KSZ8873MML Evaluation Board User’s Guide
Micrel, Inc.
January 11, 2011
Confidential
Rev. 1.1
8/11
7. Press the manual reset button. The KSZ8873MML will reset and read the new
configuration in the EEPROM. After reset, the KSZ8873MML is ready for normal
operation.
Table 3: EEPROM Mode Settings
Jumper
Description
Setting
JP9
SPIQ
Closed
JP3
SCL_MDC_SW
Closed
JP34
SCL_MDC
Closed
JP35
SDA_MDIO
Closed
JP25
Serial Bus Config. (P2LED0)
Pins 2-3 closed
JP21
Serial Bus Config. (P2LED1)
Pins 2-3 closed
4.3 SPI Slave Mode
From SPI interface to the KSZ8873MML, use a USB to SPI converter that allows
accessing all of the KSZ8873MML 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
KSZ8873MML’s full feature set. In addition to all the registers available via EEPROM
programming, a host CPU connected to the KSZ8873MML’s SPI interface will be able to
access all static MAC entries, the VLAN table, dynamic MAC address table and the MIB
counters.
To prepare the KSZ8873MML evaluation board for SPI mode configuration follow
these steps:
1. Copy the Micrel provided SPI interface software on your computer.
2. Set JP3, JP9, JP21, JP25, JP34 and JP35 as specified in Table 4 for SPI mode
configuration.
Table 4: SPI Slave Mode Settings
Jumper
Description
Setting
JP9
SPIQ
Open
JP3
SCL_MDC_SW
Open
JP34
SCL_MDC
Closed
JP35
SDA_MDIO
Closed
JP25
Serial Bus Config. (P2LED0)
Pins 2-3 closed
JP21
Serial Bus Config. (P2LED1)
Pins 1-2 closed
3.
Connect the computer’s USB port to the KSZ8873MML board with a USB port cable.
4.
Remove the EEPROM from the evaluation board. (Optional)
5.
There are two way to power up the evaluation board:
a). Connect the 5 VDC power supply to the KSZ8873MML when JP44 pin1-2 is
