Motorola MSC8101 ADS User's Guide Page 307

  • Download
  • Add to my manuals
  • Print
  • Page
    / 346
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 306
Glossary Appendix B-17
.
transaction
A complete exchange between two bus devices. A typical transaction
is composed of an address tenure and a data tenure, which may
overlap or occur separately from the address tenure. A transaction can
minimally consist of an address tenure alone.
TSA
Time-slot assigner. A functional block within the MSC8101 CPM that
connects the time-division multiplexing (TDM) interfaces to selected
communications controllers inside the MSC8101. If the TSA is not
used as intended, it can generate complex wave forms on dedicated
output pins. For instance, it can program these pins to implement
stepper motor control or variable-duty cycle and period control
on-the-fly.
UART
Universal asynchronous receiver/transmitter. A serial
communications interface.
UPM
User-programmable machine. The MSC8101 memory controller has
two UPMs. The UPMs support address multiplexing of the external
PowerPC bus, refresh timers, and generation of programmable control
signals for row address and column address strobes to allow for a
glueless interface to DRAMs, burstable SRAMs, and almost any other
kind of peripheral. The refresh timers allow refresh cycles to be
initiated. The UPM can generate different timing patterns for the
control signals that govern a memory device. These patterns define
how the external control signals behave during a read, write,
burst-read, or burst-write access request. Refresh timers are also
available to periodically generate user-defined refresh cycles.
UTOPIA
Universal Test and Operations Interface for ATM. UTOPIA is the
interface to an ATM network. It is defined by the ATM Forum in the
UTOPIA Specification Level 1 and UTOPIA Specification Level 2
documents. The Level 2 specification is a continuation of the Level 1
document. The MSC8101 is Level-1 and Level-2 compliant.
wait state
A period of time when a processor does nothing but wait. Wait states
are used to synchronize circuitry or devices operating at different
speeds so that they seem to be operating at the same speed.
word
The MSC8101 is a 16-bit processor, so a word is 16 bits.
Page view 306
1 2 ... 302 303 304 305 306 307 308 309 310 311 312 ... 345 346

Comments to this Manuals

No comments