Fujitsu F2MCTM-16LX Hardware Manual page 273

[External trigger mode (MOD2 to MOD0="001
When the external trigger mode is set, the 16-bit reload timer is started by inputting the external valid edge
to the TIN pin. When the 16-bit reload timer is started, the value set in the 16-bit reload register (TMRLR)
is reloaded to the 16-bit timer register (TMR), starting the TMR count operation.
By setting the operating mode select bits in the timer control status register (TMCSR:MOD2 to MOD0),
the detected edge can be selected from the rising edge, falling edge, and both edges.
Note:
The trigger pulse width of the edge to be inputted to the TIN pin should be 2 T (T: machine cycles) or
more.
Figure 14.5-6 Count Operation in External Trigger Mode (One-shot Mode)
Counter clock
Counter
Rel o ad data
Data load signal
UF bit
CNTE bit
TIN pin
2T to 2.5T
TOT pin
T: Machine cycle
* : It takes 2T to 2.5T time to load data of reload register from external trigger input.
Figure 14.5-7 Count Operation in External Trigger Mode (Reload Mode)
Counter clock
Counter
Rel o ad data
Data load signal
UF bit
CNTE bit
TIN pin
2T to 2.5T
TOT pin
T : Machine cycle
* : It takes 2T to 2.5T time to load data of reload register from external trigger input.
-1 0000 FFFF
H H
*
Start trigger input wait
-1 0000 Rel o ad data -1
H
*
CHAPTER 14 16-BIT RELOAD TIMER
", "010 ", "011 ")]
B B B
Rel o ad data -1 0000 FFFF
H H
0000 Rel o ad data -1 0000 Rel o ad data
H H
-1
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