High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
1.2
Buffer Types
Table 1.1 describes the pin buffer type notation used in Chapter 3, "Pin Description and Configuration,"
on page 26 and throughout this document.
Table 1.1 Buffer Types
BUFFER TYPE
DESCRIPTION
IS
O8
Schmitt-triggered Input
Output with 8mA sink and 8mA source
Open-drain output with 8mA sink
OD8
O12
OD12
PU
Output with 12mA sink and 12mA source
Open-drain output with 12mA sink
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 LAN9312. 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 LAN9312. When connected to
a load that must be pulled low, an external resistor must be added.
AI
AO
Analog input
Analog output
AIO
ICLK
OCLK
P
Analog bi-directional
Crystal oscillator input pin
Crystal oscillator output pin
Power pin
Revision 1.2 (04-08-08)
SMSC LAN9312
DATA1S8HEET
SMSC [ SMSC CORPORATION ]
