поискавой системы для электроныых деталей |
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CS80C286-25 датащи(PDF) 11 Page - Intersil Corporation |
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CS80C286-25 датащи(HTML) 11 Page - Intersil Corporation |
11 / 13 page 3-138 80C286/883 NOTES: 1. Status lines are held at a high impedance logic one by the 80C286 during a HOLD state. 2. Address, M/IO and COD/lNTA may start floating during any TC depending on when internal 80C286 bus arbiter decides to release bus to external HOLD. The float starts in φ2 of T C. 3. BHE and LOCK may start floating after the end of any TC depending on when internal 80C286 bus arbiter decides to release bus to ex- ternal HOLD. The float starts in φ1 of T C. 4. The minimum HOLD to HLDA time is shown. Maximum is one TH longer. 5. The earliest HOLD time is shown. It will always allow a subsequent memory cycle if pending is shown. 6. The minimum HOLD to HLDA time is shown. Maximum is a function of the instruction, type of bus cycle and other machine state (i.e., Interrupts, Waits, Lock, etc.). 7. Asynchronous ready allows termination of the cycle. Synchronous ready does not signal ready in this example. Synchronous ready state is ignored after ready is signaled via the asynchronous input. FIGURE 8. MULTIBUS WRITE TERMINATED BY ASYNCHRONOUS READY WITH BUS HOLD Waveforms (Continued) VALID VALID VALID (SEE NOTE 3) (SEE NOTE 2) (SEE NOTE 1) (SEE NOTE 6) (SEE NOTE 5) NOT READY NOT READY NOT READY NOT READY (SEE NOTE 7) READY (SEE NOTE 7) DELAY ENABLE VOH TH φ2 φ1 TH φ2 φ1 TH φ2 φ1 BUS HOLD ACKNOWLEDGE TS φ2 φ1 TC φ2 φ1 TC φ2 φ1 TC φ2 φ1 TI φ2 φ1 TH φ2 φ1 BUS HOLD ACKNOWLEDGE WRITE CYCLE BUS CYCLE TYPE CLK HOLD (SEE NOTE 4) HLDA S1 • S0 A23 - A0 M/IO, D15 - D0 SRDY + ARDY + CMDLY MWTC DT/R ALE COD/INTA BHE, LOCK SRDYEN ARDYEN DEN TS - STATUS CYCLE CT - COMMAND CYCLE (SEE NOTE 1) |
Аналогичный номер детали - CS80C286-25 |
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Аналогичное описание - CS80C286-25 |
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