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ISA/PCI ReferenceCBI/CGI Technical Reference
Chassis Plans 2-17
STOP#
Stop indicates that the current target is requesting the master to stop the current transaction.
TCK (optional)
Test Clock is used to clock state information and test data into and out of the device during
operation of the TAP (Test Access Port).
TDI (optional)
Test Data Input is used to serially shift test data and test instructions into the device during TAP
(Test Access Port) operation.
TDO (optional)
Test Data Output is used to serially shift test data and test instructions out of the device during
TAP (Test Access Port) operation.
TMS (optional)
Test Mode Select is used to control the state of the TAP (Test Access Port) controller in the
device.
TRDY#
Target Ready indicates the target agent’s (selected device’s) ability to complete the current data
phase of the transaction. TRDY# is used in conjunction with IRDY#. During a read, TRDY#
indicates that valid data is present on AD[31::00]. During a write, it indicates that the target is
prepared to accept data.
TRST# (optional)
Test Reset provides an asynchronous initialization of the TAP controller. This signal is optional
in the IEEE Standard Test Access Port and Boundary Scan Architecture.