KSZ8864RMNI MICREL [Micrel Semiconductor], KSZ8864RMNI Datasheet - Page 52

• 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 4 (0x04): Global Control 2
7
6
5
Name
IEEE 802.3x Receive
Flow Control Disable
Frame Length Field Check
Aging Enable
fast age Enable
Aggressive Back Off
Enable
Unicast Port-VLAN
Mismatch Discard
Multicast Storm Protection
Disable
Back Pressure Mode
Description
0, will enable receive flow control based on AN result.
1, will not enable receive flow control regardless of
AN result.
Note: Bit 5 and bit 4 default values are controlled by
the same pin, but they can be programmed
independently.
1, will check frame length field in the IEEE packets
If the actual length does not match, the packet will be
dropped (for L/T <1500) .
1, Enable age function in the chip.
0, Disable aging function.
1 = Turn on fast age (800µs).
1 = Enable more aggressive back-off algorithm in half
duplex mode to enhance performance. This is not an
IEEE standard.
This feature is used for port VLAN (described in
Register 17, Register 33...).
1, all packets can not cross VLAN boundary.
0, unicast packets (excluding unknown/
multicast/broadcast) can cross VLAN boundary.
1, “Broadcast Storm Protection” does not include
multicast packets. Only DA=FFFFFFFFFFFF packets
will be regulated.
0, “Broadcast Storm Protection” includes
DA = FFFFFFFFFFFF and DA[40] = 1 packets.
1, carrier sense based backpressure is selected.
0, collision based backpressure is selected.
52
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
M9999-092011-1.4
Pin SM3RXD3
strap option.
PD (0): Enable
Rx flow control
(default).
PU(1): Disable
Tx/Rx flow
control.
Note: SM3RXD3
has internal pull-
down.
Pin SM3RXD0
strap option.
PD(0): Disable
aggressive back
off (default).
PU(1):
Aggressive back
off.
Note: SM3RXD0
has internal pull
down.
Default
0
0
1
0
0
1
1
1