KSZ8842-PMBLAM MICREL [Micrel Semiconductor], KSZ8842-PMBLAM Datasheet - Page 75
![no-image](/images/no-image-200.jpg)
KSZ8842-PMBLAM
Manufacturer Part Number
KSZ8842-PMBLAM
Description
2-Port Ethernet Switch with PCI Interface
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
1.KSZ8842-PMBLAM.pdf
(119 pages)
- Current page: 75 of 119
- Download datasheet (961Kb)
Micrel, Inc.
Port 1 Control Register 2 (Offset 0x0502): P1CR2
This register contains the global per port control for the switch port 1 function.
October 2007
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
Default
0
0
0
0
0
1
1
0
0
0
0
0
0
R/W
R/W
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Description
Reserved
Ingress VLAN filtering
1 = the switch will discard packets whose VID port membership in VLAN
table bits [18:16] does not include the ingress port.
0 = no ingress VLAN filtering.
Discard Non PVID packets
1 = the switch will discard packets whose VID does not match ingress port
default VID.
0 = no packets will be discarded.
Force flow control
1 = will always enable flow control on the port, regardless of AN result.
0 = the flow control is enabled based on AN result.
Back pressure enable
1 = enable port’s half duplex back pressure
0 = disable port’s half duplex back pressure.
Transmit enable
1 = enable packet transmission on the port
0 = disable packet transmission on the port
Receive enable
1 = enable packet reception on the port
0 = disable packet reception on the port
Learning disable
1 = disable switch address learning capability
0 = enable switch address learning
Sniffer port
1 = Port is designated as sniffer port and will transmit packets that are
monitored.
0 = Port is a normal port
Receive sniff
1 = All the packets received on the port will be marked as “monitored
packets” and forwarded to the designated “sniffer port”
0 = no receive monitoring
Transmit sniff
1 = All the packets transmitted on the port will be marked as “monitored
packets” and forwarded to the designated “sniffer port”
0 = no transmit monitoring
Reserved
User Priority Field
1 = if the packet’s “user priority field” is greater than the “user priority bits”
in port 1’s VID Control register bits [15:13], replace the packet’s “user
priority field” with the “user priority bits” in port 1’s VID Control register bits
[15:13].
0 = do not compare and replace the packet’s ‘user priority field”
75
KSZ8842-PMQL/PMBL
M9999-100207-1.5
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