KSZ8842-PMBL Micrel Inc, KSZ8842-PMBL Datasheet - Page 74

• Manufacturer Part Number: KSZ8842-PMBL
• Description: 2-Port Ethernet Switch/Repeater + 32-bit/33MHz PCI Bus Interface ( )
• Manufacturer: Micrel Inc

Specifications of KSZ8842-PMBL

• Controller Type: Ethernet Switch Controller
• Interface: PCI
• Voltage - Supply: 3.1 V ~ 3.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LFBGA
• Number Of Primary Switch Ports: 2
• Internal Memory Buffer Size: 32
• Operating Supply Voltage (typ): 3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII
• Power Supply Type: Analog/Digital
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 3.5V
• Operating Supply Voltage (min): 3.1V
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-1636 - BOARD EVALUATION KSZ8842-PMQL
• Current - Supply: -
• Lead Free Status / RoHS Status: Supplier Unconfirmed, Lead free / RoHS Compliant
• Other names: 576-3089

Micrel, Inc.
Port 1 Control Register 1 (Offset 0x0500): P1CR1
This register contains the global per port control for the switch port 1 function.
October 2007
15 – 8
Bit
4:3
7
6
5
2
1
0
Default
0x00
0
0
0
0
0
0
0
R/W
RW
RW
RW
RW
RW
RW
RW
RO
Description
Reserved
Broadcast storm protection enable
1 = enable broadcast storm protection for ingress packets on the port
0 = disable broadcast storm protection
Diffserv priority classification enable
1 = enable diffserv priority classification for ingress packets on port
0 = disable diffserv function
802.1p priority classification enable
1 = enable 802.1p priority classification for ingress packets on port
0 = disable 802.1p
Port based priority classification
00 = ingress packets on port 1 will be classified as priority 0 queue if
“Diffserv” or “802.1p” classification is not enabled or fails to classify.
01 = ingress packets on port 1 will be classified as priority 1 queue if
“Diffserv” or “802.1p” classification is not enabled or fails to classify.
10 = ingress packets on port 1 will be classified as priority 2 queue if
“Diffserv” or “802.1p” classification is not enabled or fails to classify.
11 = ingress packets on port 1 will be classified as priority 3 queue if
“Diffserv” or “802.1p” classification is not enabled or fails to classify.
Note: “Diffserv”, “802.1p” and port priority can be enabled at the same
time. The OR’ed result of 802.1p and DSCP overwrites the port priority.
Tag insertion
1 = when packets are output on the port, the switch will add 802.1p/q tags
to packets without 802.1p/q tags when received. The switch will not add
tags to packets already tagged. The tag inserted is the ingress port’s
“port VID”.
0 = disable tag insertion
Tag removal
1 = when packets are output on the port, the switch will remove 802.1p/q
tags from packets with 802.1p/q tags when received. The switch will not
modify packets received without tags.
0 = disable tag removal
TX Multiple Queues Select Enable
1 = the port output queue is split into four priority queues.
0 = single output queue on the port. There is no priority differentiation
even though packets are classified into high or low priority.
74
KSZ8842-PMQL/PMBL
M9999-100207-1.5