lan9313 Standard Microsystems Corp., lan9313 Datasheet - Page 222

• Manufacturer Part Number: lan9313
• Description: Lan9313/lan9313i Three Port 10/100 Managed Ethernet Switch With Mii
• Manufacturer: Standard Microsystems Corp.

Revision 1.2 (04-08-08)
13.1.7.8
31:16
BITS
13:8
6:5
4:2
15
14
7
1
0
RESERVED
(See
RESERVED
Switch Looopback MII
When set, transmissions from the switch fabric Port 0(External MII) are not
sent to the External MII. Instead, they are looped back into the switch
engine.
From the MAC viewpoint, this is effectively a FAR LOOPBACK.
If loopback is enabled during half-duplex operation, then the Enable Receive
Own Transmit bit in the
(MAC_RX_CFG_x)
ignore receive activity when transmitting in half-duplex mode.
This mode works even if the Isolate bit of the
Register (VPHY_BASIC_CTRL)
RESERVED
Switch Collision Test MII
When set, the collision signal to the switch fabric Port 0(External MII) is
active during transmission from the switch engine.
It is recommended that this bit be used only when using loopback mode.
RESERVED
Current Speed/Duplex Indication
This field indicates the current speed and duplex of the Virtual PHY link.
RESERVED
SQEOFF
This bit enables/disables the Signal Quality Error (Heartbeat) test.
0: SQE test enabled
1: SQE test disabled
Virtual PHY Special Control/Status Register (VPHY_SPECIAL_CONTROL_STATUS)
This read/write register contains a current link speed/duplex indicator and SQE control.
[4]
Note
0
0
0
0
1
1
1
1
13.44)
Offset:
Index (decimal):
[3]
0
0
1
1
0
0
1
1
must be set for this port. Otherwise, the switch fabric will
Port x MAC Receive Configuration Register
[2]
1DCh
31
0
1
0
1
0
1
0
1
DESCRIPTION
is set.
DATASHEET
100Mbps
100Mbps
10Mbps
10Mbps
Speed
222
Virtual PHY Basic Control
Size:
RESERVED
RESERVED
RESERVED
RESERVED
half-duplex
half-duplex
full-duplex
full-duplex
Duplex
Three Port 10/100 Managed Ethernet Switch with MII
32 bits
Note 13.46
NASR
TYPE
R/W
R/W
R/W
SMSC LAN9313/LAN9313i
RO
RO
RO
RO
RO
RO
Note 13.45
Note 13.47
DEFAULT
Datasheet
0b
0b
-
-
-
-
-