KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 66

• Manufacturer Part Number: KSZ8895MQ_12
• Description: Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
Port Registers (Continued)
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
Note: Bits 2-0 are used for spanning tree support. See “Spanning Tree Support” section.
March 2012
Address
7
6
5
4
3
2
1
0
Name
User Priority Ceiling
Ingress VLAN Filtering.
Discard Non-PVID
packets
Force Flow Control
Back Pressure Enable
Transmit Enable
Receive Enable
Learning Disable
Description
1, If packet ‘s “user priority field” is greater than the
“user priority field” in the port default tag register,
replace the packet’s “user priority field” with the “user
priority field” in the port default tag register control 3.
0, no replace packet’s priority filed with port default tag
priority filed of the port register control 3 bit[7:5].
1, the switch will discard packets whose VID port
membership in VLAN table bit[20:16] does not include
the ingress port.
0, no ingress VLAN filtering.
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
(Default)
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.
1, disable switch address learning capability.
0, enable switch address learning.
66
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
KSZ8895MQ/RQ/FMQ
Strap-in option
LED1_1/PCOL
port 3/port 4 LED1_1
default Pull up (1):
Not force flow
control;
PCOL default Pull-
down (0): Not force
flow control. LED1_1
Pull down (0): Force
flow control; PCOL
Pull-up (1): Force
flow control.
Note: LED1_1 has
internal pull-up;
PCOL have 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.
M9999-032612-1.5
Default
0
0
0
0
1
1
0
For