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CHAPTER 8 16-bit reload timer
[External gate input mode (MOD2 to MOD0 = "1x0
When the external gate input mode is set, start the 16-bit reload timer by setting the software trigger bit in
the timer control status register (TMCSR: TRG) to "1".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).
• After the 16-bit reload timer is started, the count operation of the TMR is performed while the set gate
input level is input to the TIN pin.
• The gate input level (High or Low) can be selected by setting the operation mode select bits in the timer
control status register (TMCSR: MOD2 to MOD0).
Figure 8.5-8 Count Operation in External Gate Input Mode (One-shot Mode)
Count clock
Counter
Data load signal
UF bit
CNTE bit
TRG bit
TIN pin
TOT pin
T : Machine cycle
: It takes 1T time from trigger input to loading data of reload register.
Figure 8.5-9 Count Operation in External Gate Input Mode (Reload Mode)
Count clock
Counter
Data load signal
UF bit
CNTE bit
TRG bit
TIN pin
TOT pin
T : Machine cycle
: It takes 1T time from trigger input to loading data of reload register.
268
Reload data
-1
-1
T
Reload data
-1
-1
T
", "1x1
B
B
Reload
FFFF
0000
H
H
data
T
Activating trigger input waite
Reload
-1
-1
0000
H
data
")]
-1
-1
-1
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