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
PIN / DEFAULT
VALUE
STRAP NAME
DESCRIPTION
LED_en_strap[7:0]
LED Enable Straps: Configures the default value for the
LED_EN bits in the LED Configuration Register
(LED_CFG). A high value configures the associated
LED/GPIO pin as a LED. A low value configures the
associated LED/GPIO pin as a GPIO.
LED_EN
Note:
One pin configures the default for all 8
LED/GPIOs, but 8 separate bits are loaded by the
EEPROM Loader, allowing individual control over
each LED/GPIO.
LED_fun_strap[1:0]
auto_mdix_strap_1
LED Function Straps: Configures the default value for the
LED_FUN bits in the LED Configuration Register
(LED_CFG). When configured low, the corresponding bit
will be cleared. When configured high, the corresponding
bit will be set.
00b
Port 1 Auto-MDIX Enable Strap: Configures the default
value for the Auto-MDIX functionality on Port 1 when the
AMDIXCTL bit in the Port x PHY Special Control/Status
Indication Register
AUTO_MDIX_1
(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_1
autoneg_strap_1
Port 1 Manual MDIX Strap: Configures MDI(0) or MDIX(1)
for Port 1 when the auto_mdix_strap_1 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 1 Auto Negotiation Enable Strap: Configures the
default value for the Auto-Negotiation (PHY_AN) enable bit
in the PHY_BASIC_CTRL_1 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)
DATA4S1HEET
SMSC [ SMSC CORPORATION ]
