Motorola MPC8240 User Manual page 623

S
Scan interface. The 603e's test interface.
Slave. The device addressed by a master device. The slave is identified in the
Snooping. Monitoring addresses driven by a bus master to detect the need for
Snoop push. Write-backs due to a snoop hit. The block will transition to an
Split-transaction. A transaction with independent request and response
Split-transaction Bus. A bus that allows address and data transactions from
Superscalar machine. A machine that can issue multiple instructions
Supervisor mode. The privileged operation state of the 603e. In supervisor
T
Tenure. The period of bus mastership. For the 603e, there can be separate
Transaction. A complete exchange between two bus devices. A transaction
Transfer termination. Signal that refers to both signals that acknowledge the
U
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User mode. The unprivileged operating state of the 603e. In user mode,
address tenure and is responsible for supplying or latching the
requested data for the master during the data tenure.
coherency actions.
invalid or exclusive state.
tenures.
different processors to occur independently.
concurrently from a conventional linear instruction stream.
mode, software can access all control registers and can access the
supervisor memory space, among other privileged operations.
address bus tenures and data bus tenures. A tenure consists of three
phases: arbitration, transfer, termination
is minimally comprised of an address tenure; one or more data
tenures may be involved in the exchange. There are two kinds of
transactions: address/data and address-only.
transfer of individual beats (of both single-beat transfer and
individual beats of a burst transfer) and to signals that mark the end
of the tenure.
software can only access certain control registers and can only access
user memory space. No privileged operations can be performed.
Glossary of Terms and Abbreviations Glossary-5