High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Table 4.2 Soft-Strap Configuration Strap Definitions (continued)
DESCRIPTION
PIN / DEFAULT
VALUE
STRAP NAME
manual_FC_strap_1
Port 1 Manual Flow Control Enable Strap: Configures the
default value of the Port 1 Full-Duplex Manual Flow Control
Select (MANUAL_FC_1) bit in the Port 1 Manual Flow
Control Register (MANUAL_FC_1). When configured low,
flow control is determined by auto-negotiation (if enabled),
and symmetric PAUSE is advertised (bit 10 of the Port x
PHY Auto-Negotiation Advertisement Register
0b
(PHY_AN_ADV_x) is set).
When configured high, flow control is determined by the
Port 1 Full-Duplex Transmit Flow Control Enable
(TX_FC_1) and Port 1 Full-Duplex Receive Flow Control
Enable (RX_FC_1) bits, and symmetric PAUSE is not
advertised (bit 10 of the Port x PHY Auto-Negotiation
Advertisement Register (PHY_AN_ADV_x) is cleared).
auto_mdix_strap_2
Port 2 Auto-MDIX Enable Strap: Configures the default
value for the Auto-MDIX functionality on Port 2 when the
AMDIXCTL bit in the Port x PHY Special Control/Status
Indication Register
AUTO_MDIX_2
(PHY_SPECIAL_CONTROL_STAT_IND_x) is cleared.
When configured low, Auto-MDIX is disabled. When
configured high, Auto-MDIX is enabled.
Note:
If AMDIXCTL is set, this strap had no effect.
manual_mdix_strap_2
autoneg_strap_2
Port 2 Manual MDIX Strap: Configures MDI(0) or MDIX(1)
for Port 2 when the auto_mdix_strap_2 is low and the
AMDIXCTL bit of the Port x PHY Special Control/Status
Indication Register
0b
1b
(PHY_SPECIAL_CONTROL_STAT_IND_x) is cleared.
Port 2 Auto Negotiation Enable Strap: Configures the
default value for the Auto-Negotiation (PHY_AN) enable bit
in the PHY_BASIC_CTRL_2 register (See
Section 14.4.2.1). When configured low, auto-negotiation is
disabled. When configured high, auto-negotiation is
enabled.
This strap also affects the default value of the following bits:
PHY_SPEED_SEL_LSB and PHY_DUPLEX bits of the
Port x PHY Basic Control Register
(PHY_BASIC_CONTROL_x)
10BASE-T Full Duplex (bit 6) and 10BASE-T Half Duplex
(bit 5) bits of the Port x PHY Auto-Negotiation
Advertisement Register (PHY_AN_ADV_x)
MODE[2:0] bits of the Port x PHY Special Modes Register
(PHY_SPECIAL_MODES_x)
Refer to the respective register definition sections for
additional information.
SMSC LAN9312
Revision 1.2 (04-08-08)
DATA4S3HEET
SMSC [ SMSC CORPORATION ]
