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GT-96100A Advanced Communication Controller
28
Revision 1.0
TRdy0*
I/O
PCI_0 Target
Ready
Asserted to indicate the target agent’s ability to complete the
current data phase of the transaction. A data phase is com-
pleted on any clock when both TRdy0* and IRdy0* are
asserted. Wait cycles are inserted until TRdy0* and IRdy0* are
asserted together.
Stop0*
I/O
PCI_0 Stop
Asserted to indicate that current target is requesting the bus
master to stop the current transaction.
As a master, the GT-96100A responds to the assertion of
Stop0* by disconnecting, retrying, or aborting.
As a target, the GT-96100A asserts Stop0* to retry or discon-
nect.
Lock0*
I
PCI_0 Lock
Asserted to indicate an automatic operation that may require
multiple transactions to complete.
When the GT-96100A is a PCI_0 target, Lock0* is sampled on
the rising edge of PClk0 when Frame0* is asserted. If Lock0* is
sampled asserted, the GT-96100A enters a locked state and
remains in this state until Lock0* is sampled deasserted on the
following rising edge of PClk0, when Frame0* is sampled
asserted.
IDSel0
I
PCI_0 Initial-
ization Device
Select
Asserted to indicate a chip select during PCI_0 configuration
read and write transactions.
DevSel0*
I/O
PCI_0 Device
Select
Asserted by the target of the current access.
When the GT-96100A is bus master, it expects the target to
assert DevSel0* within five bus cycles, confirming the access. If
the target does not assert DevSel0* within this time window, the
GT-96100A aborts the cycle.
As a target, when the GT-96100A recognizes that it is the target
of a transaction, it asserts DevSel0* at medium speed (two
cycles after assertion of Frame0*).
Req0*/
PARB0_GNT1
OPCI_0 Bus
Request
If the internal arbiter for PCI_0 is disabled, this signal is
asserted by the GT-96100A to indicate to the PCI_0 bus arbiter
that it requires use of the PCI_0 bus.
PCI_0 arbiter
output grant 1
If the internal arbiter for PCI_0 is enabled, this pin functions as
the arbiter’s grant 1 output signal.
Gnt0*/
PARB0_REQ1
IPCI_0 Bus
Grant
If the internal arbiter for PCI_0 is disabled, this signal is
asserted by the external PCI_0 bus arbiter to Indicate that
access to the PCI_0 bus is granted to the GT-96100A.
PCI_0 arbiter
input request 1
If the internal arbiter for PCI_0 is enabled, this pin functions as
the arbiter’s request 1 input signal.
Table 6:
PCI Bus 0 Pin Assignments (Continued)
Pin Name
Type
Full Name
Descrip tion