KSZ8873MLL Errata

KSZ8873 Rev.A2 Errata Sheet
Dear Customer,
The following is the errata for the currently sampling KSZ8873, 3-Port Switch
family. The following issues currently exhibited on the Revision-A2 silicon.
Item
Symptom
1
LinkMD not working in the Port 1
Comment
Can not get the right
LinkMD status in the
register.
Solution/Workaround
Will be fixed in next
revision
2
The rate will be double with tag
insertion
Will be fixed in next
revision
3
MDC/MDIO can’t write MIIM
register 0 bit 8, 12, 13
In the egress port rate
limiting with tag insertion,
the rate will be double
Those bits are reserved
in current datasheet.
4
RMII transmit timing is out of
max delay time specification in
the KSZ8873RLL
Upon reset or warm reset, the
start switch bit in Register 1 is
cleared to ‘0’ in I2C master
mode.
The data delay time is
18ns, it is doesn’t affect
to transfer data on RMII
As the result, the switch
doesn’t work in the I2C
master mode.
Will be fixed in next
revision
Port 1 Receiving Flow Control
doesn’t take effect when port 1
receives Pause frame.
As the result, the port 1
still transmit normal
packets when receive
pause frame.
5
6
MICREL CONFIDENTIAL
Page1
Will be fixed in next
revision
Workaround solution:
Set Register 78 (0x4E) bit
0 = ‘1’ when program the
EEPROM.
The I2C master mode will
work fine.
Workaround solution:
Set Register 21 Port 1
Control 5 bit [7] = ‘1’ (this
is a reserved bit). Port 1
Receiving Flow Control
will work fine.
08/02/2013