KSZ8995XA Micrel Inc, KSZ8995XA Datasheet - Page 36

• Manufacturer Part Number: KSZ8995XA
• Description: IC SWITCH 10/100 5PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8995XA

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Number Of Primary Switch Ports: 5
• Internal Memory Buffer Size: 64
• Operating Supply Voltage (typ): 1.8/2.5/3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII/SNI
• Power Supply Type: Analog/Digital
• Package Type: PQFP
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-1642 - BOARD EVALUATION FOR KSZ8995XA
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-1042

September 2008
Register 18 (0x12): Port 1 Control 2
Register 34 (0x22): Port 2 Control 2
Register 50 (0x32): Port 3 Control 2
Register 66 (0x42): Port 4 Control 2
Register 82 (0x52): Port 5 Control 2
Address
7
6
5
4-0
Address
7
6
5
4
3
2
1
Name
Sniffer port
Receive sniff
Transmit sniff
Port VLAN membership
Name
Reserved
Reserved
Discard non-PVID
packets
Force flow control
Back pressure enable
Transmit enable
Receive enable
Description
1, port is designated as sniffer port and will transmit
packets that are monitored.
0, port is a normal port.
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.
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.
Define the port’s Port VLAN membership. Bit 4 stands
for port 5, bit 3 for port 4...bit 0 for port 1. The port can
only communicate within the membership. A ‘1’
includes a port in the membership, a ‘0’ excludes a port
from membership.
Description
Reserved
Reserved
1, the switch will discard packets whose VID does not
match ingress port default VID.
0, no packets will be discarded.
1, will always enable Rx and Tx flow control on the
port, regardless of AN result.
0, the flow control is enabled based on AN result.
Note: Setting a port for both half-duplex and forced
flow control is an illegal configuration. For half-duplex
enable back pressure.
1, enable port half-duplex back pressure.
0, disable port half-duplex back pressure.
1, enable packet transmission on the port.
0, disable packet transmission on the port.
1, enable packet reception on the port.
0, disable packet reception on the port.
36
Mode
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0 For port 4 only,
there is a special
configuration pin
to set the default,
Pin PCOL strap
option. Pull-down
(0): No force flow
control. Pull-up
(1): Force flow
control. Note:
PCOL has
internal pull-down .
Pin PMRXD2
strap option. Pull-
down (0): disable
back pressure.
Pull-up(1): enable
back pressure.
Note: PMRXD2
has internal pull-
down.
M9999-091508
Default
Default
0x1f
0x0
0
0
0
0
0
1
1