SMSC LAN9500 - Manual (Page 19)

Hi-Speed USB 2.0 to 10/100 Ethernet Controller
Datasheet
SMSC LAN9500/LAN9500i 19 Revision 1.7 (10-02-08)
DATASHEET
2.1 Buffer Types
Table 2.10 Buffer Types
BUFFER TYPE DESCRIPTION
IS Schmitt-triggered Input
IS_5V 5V Tolerant Schmitt-triggered Input
O8 Output with 8mA sink and 8mA source
OD8 Open-drain output with 8mA sink
O12 Output with 12mA sink and 12mA source
OD12 Open-drain output with 12mA sink
PU 50uA (typical) internal pull-up. Unless otherwise noted in the pin description, internal pull-
ups are always enabled.
Note: Internal pull-up resistors prevent unconnected inputs from floating. Do not rely on
internal resistors to drive signals external to the LAN9500/LAN9500i. When
connected to a load that must be pulled high, an external resistor must be added.
PD 50uA (typical) internal pull-down. Unless otherwise noted in the pin description, internal
pull-downs are always enabled.
Note: Internal pull-down resistors prevent unconnected inputs from floating. Do not rely
on internal resistors to drive signals external to the LAN9500/LAN9500i. When
connected to a load that must be pulled low, an external resistor must be added.
AI Analog input
AIO Analog bi-directional
ICLK Crystal oscillator input pin
OCLK Crystal oscillator output pin
P Power pin