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KSZ8895MQ Datasheet(PDF) 67 Page - Micrel Semiconductor

Part # KSZ8895MQ
Description  Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

KSZ8895MQ Datasheet(HTML) 67 Page - Micrel Semiconductor

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Micrel, Inc.
KSZ8895MQ/RQ/FMQ
March 2012
67
M9999-032612-1.5
Port Registers (Continued)
Register 19 (0x13): Port 1 Control 3
Register 35 (0x23): Port 2 Control 3
Register 51 (0x33): Port 3 Control 3
Register 67 (0x43): Port 4 Control 3
Register 83 (0x53): Port 5 Control 3
Address
Name
Description
Mode
Default
7-0
Default Tag [15:8]
Port’s default tag, containing:
7-5: user priority bits
4: CFI bit
3-0 : VID[11:8]
R/W
0
Register 20 (0x14): Port 1 Control 4
Register 36 (0x24): Port 2 Control 4
Register 52 (0x34): Port 3 Control 4
Register 68 (0x44): Port 4 Control 4
Register 84 (0x54): Port 5 Control 4
Address
Name
Description
Mode
Default
7-0
Default Tag [7:0]
Default port 1’s tag, containing:
7-0: VID[7:0]
R/W
1
Note:
Registers 19 and 20 (and those corresponding to other ports) serve two purposes: (1) Associated with the ingress untagged packets, and used for
egress tagging; (2) Default VID for the ingress untagged or null-VID-tagged packets, and used for address look up.
Register 87 (0x57): RMII Management Control Register
Address
Name
Description
Mode
Default
7 - 4
Reserved
N/A Do not change.
RO
0000
3
Port 5 SW5-RMII 50MHz
clock output disable
(used for KSZ8895RQ
only)
Disable the output of port 5 SW5-RMII 50 MHz output
clock on RXC pin when 50MHz clock is not being used
by the device and the 50MHz clock from external
oscillator or opposite device in RMII mode
1 = Disable clock output when RXC pin is not used in
RMII mode
0 = Enable clock output in RMII mode
Note:MQ/FMQ is reserved with read only for this bit.
R/W
0
2
P5-RMII 50MHz clock
output disable
(used for KSZ8895RQ
only)
Disable the output of port 5 P5-RMII 50 MHz output
clock on RXC pin when 50MHz clock is not being used
by the device and the 50MHz clock from external
oscillator or opposite device in RMII mode
1 = Disable clock output when RXC pin is not used in
RMII mode
0 = Enable clock output in RMII mode
Note:MQ/FMQ is reserved with read only for this bit.
R/W
0
1 - 0
Reserved
N/A Do not change.
RO
00


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