LAN9303 Datasheet, PDF (54/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
PIN
PHYADDR_LED5P
MNGT1_LED4P
MNGT0_LED3P
E2PSIZE_LED2P
AMDIX2_LED1P
AMDIX1_LED0P
Table 4.4 PIN/Shared Strap Mapping
STRAP NAME 1
phy_addr_sel_strap
mngt_mode_strap[1]
mngt_mode_strap[0]
eeprom_size_strap
auto_mdix_strap_2
auto_mdix_strap_1
STRAP NAME 2
led_pol_strap[5]
led_pol_strap[4]
led_pol_strap[3]
led_pol_strap[2]
led_pol_strap[1]
led_pol_strap[0]
4.3
4.3.1
Power Management
The Port 1 and Port 2 PHYs support several power management and wakeup features.
Port 1 & 2 PHY Power Management
The Port 1 & 2 PHYs provide independent general power-down and energy-detect power-down modes
which reduce PHY power consumption. General power-down mode provides power savings by
powering down the entire PHY, except the PHY management control interface. General power-down
mode must be manually enabled and disabled as described in Section 7.2.9.1, "PHY General Power-
Down," on page 101.
In energy-detect power-down mode, the PHY will resume from power-down when energy is seen on
the cable (typically from link pulses). If the ENERGYON interrupt (INT7) of either PHYs Port x PHY
Interrupt Mask Register (PHY_INTERRUPT_MASK_x) is unmasked, then the corresponding PHY will
generate an interrupt. These interrupts are reflected in the Interrupt Status Register (INT_STS) Port 2
PHY Interrupt Event (PHY_INT2) for the Port 2 PHY, and Port 1 PHY Interrupt Event (PHY_INT1) for
the Port 1 PHY. These interrupts can be used to trigger the IRQ interrupt output pin, as described in
Section 5.2.2, "Ethernet PHY Interrupts," on page 57. Refer to Section 7.2.9.2, "PHY Energy Detect
Power-Down," on page 101 for details on the operation and configuration of the PHY energy-detect
power-down mode.
Revision 1.3 (08-27-09)
54
DATASHEET
SMSC LAN9303/LAN9303i