Intel 386 User Manual download pdf (Page 258)

TIMER/COUNTER UNIT

Figure 10-14 and Figure 10-15 shows writing a new count. If the counter receives a gate-trigger

after writing a new count but before the end of the current half-cycle, the count is loaded on the

next CLKINn pulse and counting continues from the new count (Figure 10-14). Otherwise, the

new count is loaded at the end of the current half-cycle (Figure 10-15).

Figure 10-14. Mode 3 – Writing a New Count (With a Trigger)

Figure 10-15. Mode 3 – Writing a New Count (Without a Trigger)

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Intel 386 User Manual Page 258