KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 56

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

Micrel, Inc.
Global Registers (Continued)
March 2012
Address
3
2
1
0
Register 3 (0x03): Global Control 1
7
6
5
4
Enable PHY MII/RMII
Reserved
UNH Mode
Link Change Age
Pass All Frames
2K Byte packet support
IEEE 802.3x Transmit
Flow Control Disable
IEEE 802.3x Receive
Flow Control Disable
Name
Description
1, enable PHY P5-MII/RMII interface (default).
Note: if not enabled, the switch will tri-state all outputs.
N/A Do not change.
1, the switch will drop packets with 0x8808 in T/L filed,
or DA = 01-80-C2-00-00-01.
0, the switch will drop packets qualified as “flow control”
packets.
1, link change from “link” to “no link” will cause fast
aging (<800µs) to age address table faster. After an
age cycle is complete, the age logic will return to
normal (300 +/- 75 seconds ). Note: If any port is
unplugged, all addresses will be automatically aged
out.
1, switch all packets including bad ones. Used solely
for debugging purpose. Works in conjunction with
sniffer mode.
1 = enable support 2K Byte packet
0 = disable support 2K Byte packet
0, will enable transmit flow control based on AN result.
1, will not enable transmit flow control regardless of
AN result.
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.
56
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
KSZ8895MQ/RQ/FMQ
Pin LED[5][1]
strap option.
PD(0): isolate.
PU(1): Enable.
Note: LED[5][1]
has internal pull-
up (PU).
Pin PMRXD3
strap option.
PD(0): Enable Tx
flow control
(default).
PU(1): Disable
Tx/Rx flow
control.
Note: PMRXD3
has internal pull-
down.
Pin PMRXD3
strap option.
PD (0): Enable
Rx flow control
(default).
PU(1): Disable
Tx/Rx flow
control.
Note: PMRXD3
has internal pull-
down.
M9999-032612-1.5
Default
1
1
0
0
0
0
0
0