Fujitsu F2MC-16LX Hardware Manual page 340

CHAPTER 16 16-BIT RELOAD TIMER
❍ External trigger operation
The counter starts if a valid edge (either rising or falling can be selected) is input to the TIN pin.
Figure 16.3-5 "Count operation in reload mode (external trigger operation)" shows the external
trigger operation in reload mode.
Figure 16.3-5 Count operation in reload mode (external trigger operation)
Count clock
Counter
Data load signal
UF bit
CNTE bit
TIN pin
TOT pin 2T to 2.5T
T : Machine cycle * : The time from trigger input to loading the reload data is 1T.
Note:
The trigger pulse width input to the TIN pin shall be 2/φ or more.
❍ Gate input operation
Counting starts when the software trigger bit (TRG) is set to "1" while the count enable bit
(CNTE) of the timer control status register (TMCSR) is set to "1".
Counting starts when a valid level ("L" level or "H" level can be selected) of gate input specified
in the operation mode setting bits(MOD2, MOD1, and MOD0) is input to the TIN pins.
Figure 16.3-6 Count operation in reload mode (software trigger, gate input operation)
Count clock
Counter
Data load signal
UF bit
CNTE bit
TRG bit
TIN pin
TOT pin
T : Machine cycle
*1: It takes 1T from trigger input to loading reload data.
Note:
The trigger pulse width input to the TIN pin shall be 2/φ or more.
324
Reload Reload
-1 0000 -1
H
data data
*
Reload data
-1 -1 -1
Reload Reload
0000 -1 0000
H H
data
Reload
0000
-1 -1
H
data
-1
data