LAN9313 Datasheet, PDF (35/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
Table 3.5 Dedicated Configuration Strap Pins (continued)
BUFFER
PIN
NAME
SYMBOL
TYPE
DESCRIPTION
Port 2 Full-
FD_FC_2
IS
Port 2 Full-Duplex Flow Control Enable Strap:
Duplex Flow
(PU) Configures the default value of the Port 2 Full-
Control
Enable Strap
Note 3.8
Duplex Transmit Flow Control Enable (TX_FC_2)
and Port 2 Full-Duplex Receive Flow Control
Enable (RX_FC_2) bits in the Port 2 Manual Flow
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Control Register (MANUAL_FC_2), which are used
when manual full-duplex control is selected. When
latched low, full-duplex Pause packet detection and
generation are disabled. When latched high, full-
duplex Pause packet detection and generation are
enabled. See Note 3.9.
Port 2
MANUAL_FC_2
IS
Port 2 Manual Flow Control Enable Strap:
Manual Flow
(PU) Configures the default value of the Port 2 Full-
Control
Enable Strap
Note 3.8
Duplex Manual Flow Control Select
(MANUAL_FC_2) bit in the Port 2 Manual Flow
Control Register (MANUAL_FC_2). When latched
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low, flow control is determined by auto-negotiation.
When latched high, flow control is determined by
the Port 2 Full-Duplex Transmit Flow Control
Enable (TX_FC_2) and Port 2 Full-Duplex Receive
Flow Control Enable (RX_FC_2) bits. See
Note 3.9.
Port 0
(External MII)
Speed Select
Strap
SPEED_MII
IS
(PU)
Note 3.8
Port 0(External MII) Speed Select Strap:
Together with the DUPLEX_POL_MII and
MII_DUPLEX pins, configures the base ability
values in the Virtual PHY Auto-Negotiation Link
Partner Base Page Ability Register
(VPHY_AN_LP_BASE_ABILITY).
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This pin also configures the speed for Port 0 when
the Virtual Auto-Negotiation fails. When latched
low, 10Mbps is selected. When latched high,
100Mbps is selected.
Refer to Section 13.1.7.6 and Table 13.6 for more
information.
See Note 3.9.
Port 0
(External MII)
Duplex
Polarity Strap
DUPLEX_POL_MII
IS
(PU)
Note 3.8
Port 0(External MII) Duplex Polarity Strap:
Configures the polarity of the MII_DUPLEX pin for
Port 0.
If MII_DUPLEX = DUPLEX_POL_MII, full-duplex is
selected.
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If MII_DUPLEX != DUPLEX_POL_MII, half-duplex
is selected.
Refer to Section 13.1.7.6 and Table 13.6 for more
information.
See Note 3.9.
Port 0
BP_EN_MII
IS
Port 0(External MII) Backpressure Enable Strap:
(External MII)
(PU) ^{Configures the default value for the Port 0}
Backpressure
31
Enable Strap
Note 3.8
Backpressure Enable (BP_EN_MII) bit of the Port
0(External MII) Manual Flow Control Register
(MANUAL_FC_MII). When latched low,
backpressure is disabled. When latched high,
backpressure is enabled.
See Note 3.9.
SMSC LAN9313/LAN9313i
35
DATASHEET
Revision 1.2 (04-08-08)