Figure 105. mode 1 – basic operation, Figure 106. mode 1 – retriggering the one-shot – Intel 386 User Manual
Page 252
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10-9
TIMER/COUNTER UNIT
Figure 10-5. Mode 1 – Basic Operation
Figure 10-6 shows retriggering the one-shot. On the CLKINn pulse following the retrigger, the
counter reloads the count. The control logic then decrements the count on each succeeding
CLKINn pulse; OUTn remains low until the count reaches zero.
Figure 10-6. Mode 1 – Retriggering the One-shot
Writes to
Counter
n
CLKIN
n
GATE
n
OUT
n
?
?
?
?
?
0003 0002
0001
0000
FFFF
0003
Control
Word = 12H
Count
0002
Count = 3
A2312-02
Writes to
Counter
n
CLKIN
n
GATE
n
OUT
n
?
?
?
?
?
0003
0002
0001
0003
0002
0001
Control
Word = 12H
Count
0000
Count = 3
A2396-01
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