lan9303m Standard Microsystems Corp., lan9303m Datasheet - Page 200

• Manufacturer Part Number: lan9303m
• Description: Small Form Factor Three Port 10/100 Managed Ethernet Switch With Dual Mii/rmii/turbo Mii
• Manufacturer: Standard Microsystems Corp.

Revision 1.3 (08-27-09)
13.2.7.7
25:24
BITS
31
30
29
28
27
26
23
RESERVED
Switch Looopback Port 1
When set, transmissions from the Switch Fabric Port 1 are not sent to the
External MAC. 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
Own Transmit
(MAC_RX_CFG_x)
will ignore receive activity when transmitting in half-duplex mode.
Note:
Note:
RESERVED
Manual Duplex
When set, the duplex is based on the
duplex is based on the P1_DUPLEX input and duplex_pol_strap_1.
Note:
RESERVED
Turbo MII Enable
This bit, along with the
MII PHY mode.
When set, the
Mbps. When cleared, the
and 10 Mbps.
Note:
Mode
This field indicates the operating mode of port 1.
00: MII MAC mode
01: MII PHY mode
10: RMII PHY mode
11: Internal PHY mode
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:
Note:
Port 1 MII Basic Control Register (P1_MII_BASIC_CONTROL)
This register is re-written in its entirety by the EEPROM Loader following the release of reset or a
RELOAD command. Refer to
This mode works even if the
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.
This bit is used when Port 1 is in the MII MAC mode. It is not
usable in internal PHY or MII or RMII PHY modes.
When operating at 200Mbps, the drive strength of the MII output
clock is selected using the
at 100 Mbps or 10 Mbps, the drive strength is fixed at 12 mA.
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.
It is recommended that this bit be used only when using loopback
mode.
Offset:
bit in the (x=1)
Speed Select LSB
must be set for this port. Otherwise, the Switch Fabric
Speed Select LSB
Speed Select LSB
1ECh
DESCRIPTION
Port x MAC Receive Configuration Register
Section 8.4, "EEPROM Loader," on page 120
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
bit selects between 200Mbps and 10
RMII/Turbo MII Clock Strength
DATASHEET
Isolate
Duplex Mode
bit, determines the speed of the
200
bit selects between 100Mbps
bit is set.
Size:
bit. When clear, the
Enable Receive
bit. When
32 bits
SMSC LAN9303M/LAN9303Mi
for additional information.
TYPE
R/W
R/W
R/W
R/W
RO
RO
RO
RO
Note 13.56
Note 13.57
DEFAULT
Datasheet
0b
0b
0b
-
-
-