SMSC LAN9311 User Manual

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

SMSC LAN9311/LAN9311i

41

Revision 1.4 (08-19-08)

 

LED_en_strap[7:0]

LED Enable Straps: Configures the default value for the 
LED_EN bits in the 

. A high value configures the associated 

LED/GPIO pin as a LED. A low value configures the 
associated LED/GPIO pin as a GPIO.

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_EN

LED_fun_strap[1:0]

LED Function Straps: Configures the default value for the 
LED_FUN bits in the 

. When configured low, the corresponding bit 

will be cleared. When configured high, the corresponding 
bit will be set.

00b

auto_mdix_strap_1

Port 1 Auto-MDIX Enable Strap: Configures the default 
value for the Auto-MDIX functionality on Port 1 when the 
AMDIXCTL bit in the 

 is cleared. 

When configured low, Auto-MDIX is disabled. When 
configured high, Auto-MDIX is enabled.

If AMDIXCTL is set, this strap had no effect.

AUTO_MDIX_1

manual_mdix_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 

 is cleared.

0b

autoneg_strap_1

Port 1 Auto Negotiation Enable Strap: Configures the 
default value for the 

 enable bit 

in the PHY_BASIC_CTRL_1 register (See 

). 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 

„

10BASE-T Full Duplex (bit 6) and 10BASE-T Half Duplex 
(bit 5) bits of the 

„

MODE[2:0] bits of the 

Refer to the respective register definition sections for 
additional information.

1b