RC82540EP Intel, RC82540EP Datasheet - Page 17

• Manufacturer Part Number: RC82540EP
• Manufacturer: Intel

Specifications of RC82540EP

• Operating Supply Voltage (typ): 1.5/2.5/3.3V
• Operating Supply Voltage (min): 1.43/2.38/3V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 196
• Lead Free Status / RoHS Status: Not Compliant

3.4
3.4.1
3.4.2
Note: If the LAN-disable feature is used when a Flash device is present, then care must be taken by
Other Signals
system designers not to drive the FLSH_SO pin while the Flash device is driving it.
Miscellaneous Signals
LED Signals
FL_CE#
FL_SCK
FL_SI
FLSH_SO
LINK_UP#
ACTIVITY#
LINK100#
LINK1000#
SDP[7:6]
SDP[1:0]
Symbol
Symbol
Symbol
O
O
O
I
TS
Type
Type
O
O
O
O
FLASH Chip Enable Output. Used to enable FLASH device.
FLASH Serial Clock Output. The clock rate of the serial FLASH interface is
approximately 1 MHz.
FLASH Serial Data Input. This pin is an output to the memory device.
FLASH Serial Data Output. This pin is an input from the FLASH memory.
Note: The 82540EP LAN-disable mechanism is implemented using this pin. It is
generally used when no Flash device is present (Flash disabled). If this pin is 1b (Vcc)
then the 82540EP is enabled. If the pin is 0b (Vss) then the 82540EP is disabled. This
signal should be sampled within 1µs of the rising edge of LAN_PWR_GOOD and
PCI_RST_N. Note that this pin also has an internal pull-up that is sufficient enough to
enable the 82540EP if no Flash device is present.
Software Defined Pins. The Software Defined Pins are reserved and programmable
with respect to input and output capability. These default to input signals upon power-up
but may be configured differently by the EEPROM. The upper four bits may be mapped
to the General Purpose Interrupt bits if they are configured as input signals.
Note: SDP5 is not included in the group of Software Defined Pins.
Type
LED0 / LINK Up. Programmable LED indication. Defaults to indicate link
connectivity.
LED1 / Activity. Programmable LED indication. Defaults to flash to indicate
transmit or receive activity.
LED2 / LINK 100. Programmable LED indication. Defaults to indicate link at
100 Mbps.
LED3 / LINK 1000. Programmable LED indication. Defaults to indicate link at
1000 Mbps.
Name and Function
Name and Function
Name and Function
Networking Silicon — 82540EP
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