LAN9313 Datasheet, PDF (196/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

13.1.5.3
Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
Port 0(External MII) Manual Flow Control Register (MANUAL_FC_MII)
Offset:
1A8h
Size:
32 bits
This read/write register allows for the manual configuration of the switch Port 0(External MII) flow
control. This register also provides read back of the currently enabled flow control settings, whether
set manually or Auto-Negotiated. Refer to Section 6.2.3, "Flow Control Enable Logic," on page 60 for
additional information.
Note: The flow control values in the Section 13.1.7.5, "Virtual PHY Auto-Negotiation Advertisement
Register (VPHY_AN_ADV)," on page 216 are not affected by the values of this register.
BITS
DESCRIPTION
31:7 RESERVED
6 Port 0 Backpressure Enable (BP_EN_MII)
This bit enables/disables the generation of half-duplex backpressure on
switch Port 0.
0: Disable backpressure
1: Enable backpressure
5 Port 0 Current Duplex (CUR_DUP_MII)
This bit indicates the actual duplex setting of the switch Port 0.
0: Full-Duplex
1: Half-Duplex
4 Port 0 Current Receive Flow Control Enable (CUR_RX_FC_MII)
This bit indicates the actual receive flow setting of switch Port 0
0: Flow control receive is currently disabled
1: Flow control receive is currently enabled
3 Port 0 Current Transmit Flow Control Enable (CUR_TX_FC_MII)
This bit indicates the actual transmit flow setting of switch Port 0.
0: Flow control transmit is currently disabled
1: Flow control transmit is currently enabled
2 Port 0 Receive Flow Control Enable (RX_FC_MII)
When the MANUAL_FC_MII bit is set, or Virtual Auto-Negotiation is
disabled, this bit enables/disables the detection of full-duplex Pause packets
on switch Port 0.
0: Disable flow control receive
1: Enable flow control receive
1 Port 0 Transmit Flow Control Enable (TX_FC_MII)
When the MANUAL_FC_MII bit is set, or Virtual Auto-Negotiation is
disabled, this bit enables/disables full-duplex Pause packets to be generated
on switch Port 0.
0: Disable flow control transmit
1: Enable flow control transmit
TYPE
RO
R/W
RO
RO
RO
R/W
R/W
DEFAULT
-
Note 13.12
Note 13.13
Note 13.13
Note 13.13
Note 13.14
Note 13.14
Revision 1.2 (04-08-08)
196
DATASHEET
SMSC LAN9313/LAN9313i