Fujitsu F2MC-16LX Hardware Manual page 393

Measurement Mode and Counter Operation
The measurement mode can be selected from six types depending on the place where the input pulse is
measured. The cycle measurement mode is also prepared to arbitrarily divide the input pulse for high-
precision measurement of higher frequency pulse width. Table 15.3-6 shows the measurement mode list.
Table 15.3-6 The Measurement Mode List (1/2)
Measurement MOD2 MOD1 MOD0
mode
"H" pulse width
1
measurement
"L" pulse width
1
measurement
Rising
Between edges
1
Measurement at
cycle
Falling
Between edges
1
Measurement at
cycle
Between all edges
pulse width 0
measurement
0 1
The width at "H" period is measured.
Count (measurement) start: when detecting a rising edge
Count (measurement) end: when detecting a falling edge
1 0
The width at "L" period is measured.
Count (measurement) start: when detecting a falling edge
Count (measurement) end: when detecting a rising edge
0 0
A cycle between rising edges is measured.
Count (measurement) start: when detecting a rising edge
Count (measurement) end: when detecting a rising edge
1 1
A cycle between falling edges is measured.
Count (measurement) start: when detecting a falling edge
Count (measurement) end: when detecting a falling edge
1 0
The width between the edges continuously input is measured.
Count (measurement) beginning: When edge is detected
Count (measurement) end: When edge is detected
Measurement mode measured target
(W: width of a measured pulse)
W
Count start Count stop Start
W
Count start Count stop Start
W W
Count stop
Count start
Start
W W
Count stop
Count start
Start
W W
Count stop
Count start
Start
CHAPTER 15 PWC TIMER
W
Stop
W
Stop
W
Stop
Start Stop
W
Stop
Start Stop
W
Stop
Start Stop
377