KSZ8864RMNI MICREL [Micrel Semiconductor], KSZ8864RMNI Datasheet - Page 53

• Manufacturer Part Number: KSZ8864RMNI
• Description: Integrated 4-Port 10/100 Managed Switch with Two MACs MII or RMII Interfaces
• Manufacturer: MICREL [Micrel Semiconductor]

September 2011
Address
4
3
2
1
0
Register 5 (0x05): Global Control 3
7
6
5
Name
Flow Control and Back
Pressure fair Mode
No Excessive
Collision Drop
Huge Packet Support
Legal Maximum Packet
Size Check Disable
Reserved
802.1q VLAN Enable
IGMP Snoop Enable on
Switch SW4-MII Interface
Enable Direct Mode on
Switch SW4-MII Interface
Description
1, fair mode is selected. In this mode, if a flow control
port and a non-flow control port talk to the same
destination port, packets from the non-flow control port
may be dropped. This is to prevent the flow control
port from being flow controlled for an extended period
of time.
0, in this mode, if a flow control port and a non-flow
control port talk to the same destination port, the flow
control port will be flow controlled. This may not be
“fair” to the flow control port.
1, the switch will not drop packets when 16 or more
collisions occur.
0, the switch will drop packets when 16 or more
collisions occur.
1, will accept packet sizes up to 1916 bytes (inclusive).
This bit setting will override setting from bit 1 of the
same register.
0, the max packet size will be determined by bit 1 of
this register.
1, will accept packet sizes up to 1536 bytes (inclusive).
0, 1522 bytes for tagged packets (not including
packets with STPID from CPU to ports 1-4), 1518
bytes for untagged packets. Any packets larger than
the specified value will be dropped.
N/A
1, 802.1q VLAN mode is turned on. VLAN table needs
to set up before the operation.
0, 802.1q VLAN is disabled.
1, IGMP snoop enabled. All the IGMP packets will be
forwarded to Switch MII port.
0, IGMP snoop disabled.
1, direct mode on Port 4. This is a special mode for the
Switch MII interface. Using preamble before MRXDV
to direct switch to forward packets, bypassing internal
look-up.
0, normal operation.
53
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
M9999-092011-1.4
Pin SM3RXD1
strap option.
PD(0): (default )
Drop excessive
collision packets.
PU(1): Do not
drop excessive
collision packets.
Note: SM3RXD1
has internal pull
down.
Default
1
0
0
0
0
0
0
0