GD82551ER Intel, GD82551ER Datasheet - Page 18

• Manufacturer Part Number: GD82551ER
• Manufacturer: Intel

Specifications of GD82551ER

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 196
• Lead Free Status / RoHS Status: Not Compliant

82551ER — Networking Silicon
4.3
10
Table 5.
Table 6.
Note: All unused Flash Address and Data pins MUST be left floating. Some of these pins have
System and Power Management Signals
Local Memory Interface Signals
undocumented test functionality and can cause unpredictable behavior if they are
unnecessarily connected to a pull-up or pull-down resistor.
Local Memory Interface Signals
ISOLATE#
ALTRST#
VIO
FLD7:0
FLA16/
CLK25
FLA15/EESK
FLA14/
EEDO
FLA[13]/
EEDI
FLA 12:8
FLA7/
CLKEN
Symbol
Symbol
IN
IN
B
IN
IN/OUT
IN/OUT
OUT
IN/OUT
OUT
IN/OUT
IN/OUT
Type
Type
Isolate. The Isolate pin is used to isolate the 82551ER from the PCI
bus. It also provides PCI Reset pin functionality. When Isolate is active
(low), the 82551ER does not drive its PCI outputs (except PME#) or
sample its PCI inputs (including CLK and RST#). The ISOLATE# pin
should be driven by the PCI Reset signal.
Alternate Reset. The Alternate Reset pin is used to reset the
82551ER on power-up. The Alternate Reset signal should be pulled
high to the main digital power supply.
Voltage Input/Output. The VIO pin is the voltage bias pin and should
be connected to a 5 V supply in a 5 V PCI signaling environment and a
3.3 V supply in 3.3 V signaling environment.
Flash Data Input/Output. These pins are used for the Flash data
interface. These pins should be left floating if the Flash is not used.
Flash Address 16/25 MHz Clock. This multiplexed pin is controlled
by the status of the Flash Address 7 (FLA7) pin. If FLA7 is left floating,
this pin is used as FLA16; otherwise, if FLA7 is connected to a pull-up
resistor, this pin is used as a 25 MHz clock output. This pin should be
left floating if the Flash and the CLK25 functionality are not used.
Flash Address 15/EEPROM Data Output. During Flash accesses,
this multiplexed pin acts as the Flash Address 15 output signal. During
EEPROM accesses, it acts as the serial shift clock output to the
EEPROM.
Flash Address 14/EEPROM Data Output. During Flash accesses,
this multiplexed pin acts as the Flash Address 14 output signal. During
EEPROM accesses, this pin accepts serial input data from the
EEPROM Data Output pin.
Flash Address[13]/EEPROM Data Input. During Flash accesses,
this multiplexed pin acts as the Flash Address [13] output signal.
During EEPROM accesses, this pin provides serial output data to the
EEPROM Data Input pin.
Flash Address 12:8. These pins act as Flash address outputs. They
should be left floating if Flash is not used.
Flash Address 7/Clock Enable. This multiplexed pin acts as the
Flash Address 7 output signal during nominal operation. When the
power-on reset of the 82551ER is active, this pin acts as input control
over the FLA16/CLK25 output signal. If the FLA7/CLKEN pin is
connected to a pull-up resistor (3.3 K), a 25 MHz clock signal is
provided on the FLA16/CLK25 output; otherwise, it is used as FLA16
output. For systems that do not use the 25 MHz clock output or Flash,
this pin should be left floating.
Name and Function
Name and Function
Datasheet