DS80C310-ECL Dallas Semiconducotr, DS80C310-ECL Datasheet - Page 6

• Manufacturer Part Number: DS80C310-ECL
• Description: High-Speed Micro
• Manufacturer: Dallas Semiconducotr

DS87C520/DS83C520
time. In the DS80C310, the MOVX instruction takes as little as two machine cycles or eight oscillator
cycles but the “MOV direct, direct” uses three machine cycles or 12 oscillator cycles. While both are
faster than their original counterparts, they now have different execution times. This is because the
DS80C310 usually uses one instruction cycle for each instruction byte. The user concerned with precise
program timing should examine the timing of each instruction for familiarity with the changes. Note that
a machine cycle now requires just four clocks, and provides one ALE pulse per cycle. Many instructions
require only one cycle, but some require five. In the original architecture, all were one or two cycles
except for MUL and DIV. Refer to the High-Speed Microcontroller User’s Guide for details and
individual instruction timing.
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