CHAPTER 9 TIMER/COUNTER FUNCTION (REAL-TIME PULSE UNIT)
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User’s Manual U14492EJ3V0UD
9.2.6 Supplementary description of internal operation
(1) Clearing of count value in UDC mode B
When TM1n is in UDC mode B, the count value clear operation is as follows.
•
In case of TM1n up count operation: TM1n is cleared upon match with CM1n0
•
In case of TM1n down count operation: TM1n is cleared upon match with CM1n1
Figure 9-56. Clear Operation upon Match with CM1n0 During TM1n Up Count Operation
Count clock
(rising edge set as valid edge)
CM1n0
FFFEH
Clear TM1n
(Not clear TM1n)
TM1n
FFFFH
0000H
(FFFEH)
0001H
(FFFDH)
FFFFH
Up count
Up count
(Down count)
Remarks 1.
n = 0, 1
2.
Items between parentheses in the above figure apply to down count operation.
Figure 9-57. Clear Operation upon Match with CM1n1 During TM1n Down Count Operation
Count clock
(rising edge set as valid edge)
CM1n1
00FFH
TM1n
00FEH
0000H
(00FFH)
FFFFH
(0100H)
00FEH
Up count
Down count
(Up count)
Clear TM1n
(Not clear TM1n)
Remarks 1.
n = 0, 1
2.
Items between parentheses in the above figure apply to up count operation.
Содержание V850E/IA1 mPD703116
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