82551QM Datasheet, PDF (17/120 Pages) Intel Corporation – Fast Ethernet Multifunction PCI/CardBus Controller

Networking Silicon — 82551QM
Table 6. Local Memory Interface Signals
Symbol
Type
Name and Function
FLA12/
MCNTSM#
FLA11/MINT
FLA10/
MRING#
FLA9/MRST
FLA8/
IOCHRDY
FLA7/
CLKEN
FLA6:2
FLA1/
AUXPWR
FLA0/
PCIMODE#
EECS
IN/OUT
Flash Address 12/Modem Central Site Mode. This multiplexed pin
acts as the Flash Address 12 output signal in a non-modem card. If
modem is enabled, it is used as an output signal to the modem. It is
either floated by default or driven low by the Modem System Control
Registers. This pin should be left floating if Flash and modem
functionality are not used.
IN/OUT
Flash Address 11/Modem Interrupt. This multiplexed pin acts as the
Flash Address 11 output signal in a non-modem card. If modem is
enabled, it is used as the Modem Interrupt input signal. This pin
should be left floating if Flash and modem functionality are not used.
IN/OUT
Flash Address 10/Modem Ring. This multiplexed pin acts as the
Flash Address 10 output signal in a non-modem card. If modem is
enabled, it is used as the Modem Ring input signal. This pin should be
left floating if Flash and modem functionality are not used.
IN/OUT
Flash Address 9/Modem Reset. This multiplexed pin acts as the
Flash Address 9 output signal in a non-modem card. If modem is
enabled, it acts as the Modem Reset signal with an active high output.
This pin should be left floating if Flash and modem functionality are not
used.
IN/OUT
Flash Address 8/ISA Input/Output Channel Ready. This
multiplexed pin acts as the Flash Address 8 output signal in a non-
modem card. If modem is enabled, it is used as the ISA IOCHRDY
input signal. This pin should be left floating if Flash and modem
functionality are not used.
IN/OUT
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 82551QM is active, this pin acts as input control
over the FLA 16/CLK25 output signal. If the FLA 7/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.
OUT
Flash Address 6:2. These pins are used as Flash address outputs. If
the modem is enabled, these pins carry modem address bits 6:2.
These pins should be left floating if the Flash and modem are not
used.
Flash Address 1/Auxiliary Power. This multiplexed pin acts as the
Flash Address 1 output signal during nominal operation. If the modem
is enabled, this pin carries modem address bit 1. When the power-on
TS
reset of the 82551QM is active (low), it acts as the power supply
indicator. If the 82551QM is fed by auxiliary power, it should be
connected to VCC through a pull-up resistor (3.3 K ). Otherwise, this
pin should be left floating.
Flash Address 0/PCI Mode. This multiplexed pin acts as the Flash
Address[0] output signal during nominal operation. If the modem is
enabled, this pin carries modem address bit 0. When power-on reset
TS
of the 82551QM is active (low), it acts as the input system type. If the
82551QM is used in a CardBus system, this pin should be connected
to a pull-up resistor (3.3 K ); otherwise, the 82551QM considers the
host as a PCI system. For PCI systems that do not use Flash or
modem, this pin should be left floating.
OUT
EEPROM Chip Select. The EEPROM Chip Select signal is used to
assert chip select to the serial EEPROM.
Datasheet
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