82544EI Datasheet, PDF (13/52 Pages) Intel Corporation – Gigabit Ethernet Controller

82544EI Gigabit Ethernet Controller Networking Silicon Datasheet
Signal Name
TRDY#
STOP#
IDSEL
DEVSEL#
VIO
Type
STS
STS
I
STS
P
Name and Function
Target Ready. TRDY# indicates the ability of the 82544EI controller (as a
selected device) to complete the current data phase of the transaction.
TRDY# is used in conjunction with IRDY#.
A data phase is completed on any clock in which both TRDY# and IRDY#
are sampled asserted. During a read, TRDY# indicates that valid data is
present on AD[63:0]. During a write, it indicates the target is ready to
accept data. Wait cycles are inserted until both IRDY# and TRDY# are
asserted together. The 82544EI device drives IRDY# when acting as a
slave and samples it when acting as a master.
Stop. STOP# indicates the current target is requesting the master to stop
the current transaction. As a slave, the 82544EI controller drives STOP# to
request the bus master to stop the transaction. As a master, the 82544EI
controller receives STOP# from the slave and stops the current transaction.
Initialization Device Select. IDSEL is used by the 82544EI device as a
chip select during configuration read and write transactions.
Device Select. When being actively driven by the 82544EI controller,
DEVSEL# indicates to the bus master that it has decoded its address as
the target of the current access. As an input, DEVSEL# indicates whether
any device on the bus has been selected.
VIO. VIO is a voltage reference for PCI interface (3.3 V or 5 V). It is used as
the clamping voltage.
NOTE: An external resistor is required between the voltage reference and
the VIO balls.The targeted resistor value is 100 KΩ.
Datasheet
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