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User’s Manual U11969EJ3V0UM00
185
CHAPTER 7 TIMER/COUNTER FUNCTION (REAL-TIME PULSE UNIT)
Figure 7-12. Operation after Occurrence of Overflow (OST1 = 1)
7.5.4 Clearing/starting timer
There are two methods of clearing/starting timer 1: by overflow and by software.
(1) Clearing/starting by overflow
For the details of the operation, refer to 7.5.3 Overflow.
(2) Clearing/starting by software
When the CS1 bit is set to 1 by software, the TM1 register clears its value and starts counting from 0.
However, this setting of the bit is valid only when the value of the CE1 bit is 1.
Figure 7-13. Clearing/Starting Timer by Software (when OST1 = 1)
TM1
INTOV1
0
OST
←
1
CE1
←
1
CE1
←
1
Count starts
Overflow
FFFFFFH
Overflow
FFFFFFH
TM1
INTOV1
0
CE1
←
1
CS1
←
1
or
CE1
←
1
CS1
←
1
Count starts
Overflow
FFFFFFH
Clear & start
Содержание V854 UPD703006
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