82545GM — Networking Silicon
Table 7. I/O Characteristics
Symbol
Parameter
Condition
Min
Typ
Max Unit
CIN
Input capacitance
Any input and bi-
directional buffer
2.5
pF
COUT
CPUD
Output capacitance
Pull-up/down Resistor value
Any output buffer
2.0
pF
7.5
20
k
a. TTL3 signals include: EE_DI, EE_SK, EE_CS, and JTAG_TDO.
TTL6 signals include: FL_CE#, CLK_VIEW, FL_DATA[7:0], FL_ADDR[18:0], FL_OE#, and FL_WE#.
TTL12 signals include: LED0 / LINK #, LED1 / ACT #, LED2 / LINK100 #, LED3 / LINK1000 #, SDP0, SDP1, SDP6, and SDP7.
5.4
AC Characteristics
Table 8. AC Characteristics: 3.3 V Interfacing
Symbol
Parameter
Min
Typ
Max
Unit
fPCICLK
Clock frequency in PCI mode
fPCICLK
Clock frequency in PCI-X mode
66
66
MHz
133
MHz
Table 9. 25 MHz Clock Input Requirements
Symbol
Parametera
Min
Typ
Max
Unit
fi_TX_CLK
TX_CLK_IN frequency
25 - 50 ppm
25
25 + 50
ppm
MHz
a. This parameter applies to an oscillator connected to the Crystal One (XTAL1) input. Alternatively, a crystal may be connected
to XTAL1 and XTAL2 as the frequency source for the internal oscillator.
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Datasheet