LAN9303MI-AKZE Datasheet, PDF (203/386 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
Datasheet
BITS
DESCRIPTION
23 Switch Collision Test Port 1
When set, the collision signal to the Switch Fabric Port 1 is active during
transmission from the Switch Engine.
Note: This bit is used when Port 1 is in the MII or RMII PHY mode. It is
not usable in the internal PHY or MII MAC modes.
Note: It is recommended that this bit be used only when using loopback
mode.
22 RMII Clock Direction
0: Selects P1_OUTCLK as an Input
1: Selects P1_OUTCLK as an Output
21 RMII/Turbo MII Clock Strength
For RMII and 200 Mbps MII PHY modes, a low selects 12 mA drive while a
high selects a 16 mA drive. For 100 Mbps and 10 Mbps MII PHY modes,
the drive strength is fixed at 12mA.
20:17 RESERVED
16 SQEOFF
This bit enables/disables the Signal Quality Error (Heartbeat) test.
0: SQE test enabled
1: SQE test disabled
Note: This bit is used when Port 1 is in MII PHY mode. It is not usable
in internal PHY, RMII PHY, or MII MAC modes.
15 RESERVED
14 Loopback
When set, transmissions from the external MAC are not sent to the Switch
Engine. Instead, they are looped back onto the receive path.
Note: This bit is used when Port 1 is in MII or RMII PHY mode. It is not
usable in internal PHY or MII MAC modes.
13 Speed Select LSB
This bit is used, along with the Turbo MII Enable bit, to set the speed.
0: 10 Mbps
1: 200 or 100 Mbps
Note: This bit is used when Port 1 is in MII or RMII PHY mode. It is not
usable in internal PHY or MII MAC modes.
12:11 RESERVED
10 Isolate
When set and in PHY mode, the MII output pins are not driven, the MII pull-
ups and pull-downs are disabled, and the input pins are ignored.
Note: This bit is used when Port 1 is in MII or RMII PHY mode. It is not
usable in internal PHY or MII MAC modes.
9 RESERVED
8 Duplex Mode
In MII and RMII PHY modes, this bit is used to set the duplex. In MII MAC
mode, this bit is used to set the duplex when the Manual Duplex bit is set.
0: Half duplex
1: Full duplex
Note: This bit is used when Port 1 is in MII PHY, RMII PHY, or MII MAC
mode. It is not usable in internal PHY mode.
TYPE
R/W
R/W
R/W
RO
R/W
RO
R/W
R/W
RO
R/W
RO
R/W
DEFAULT
0b
Note 13.58
Note 13.59
-
Note 13.60
-
0b
Note 13.61
-
0b
-
Note 13.62
SMSC LAN9303M/LAN9303Mi
203
DATASHEET
Revision 1.5 (07-08-11)