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Chapter 10
Timer
Preliminary User’s Manual U15839EE1V0UM00
10.1.7 Precautions Timer C
Various precautions concerning Timer C are shown below.
(1)
The following bits and registers must not be rewritten during operation (TMCC00 register
CE = 1).
• CS2 to CS0 bits of TMCC00 register
• TMCC01 register
• SESC0 register
(2)
The CAE bit of the TMCC00 register is a TMC0 counter reset signal. To use TMC0, first set the
CAE bit to 1.
(3)
The analog noise elimination time + two cycles of the input clock are required to detect a valid
edge of the external input (TIC00 or TIC01). Therefore, edge detection will not be performed
normally for changes that are less than the analog noise elimination time + two cycles of the input
clock.
(4)
The operation of an interrupt output (INTCCC00 or INTCCC01) is automatically determined
according to the operating state of the capture/compare registers (CCC00, CCC01). When the
capture/compare registers are used for a capture mode, the external trigger (TIC00,TIC01) is used
for valid edge detection. When the capture/compare registers are used for a compare mode, the
external interrupt output is used for a match interrupt indicating a match with the TMC0 register.
(5)
If the ENTO and ALV bits of the TMCC01 register are changed at the same time, a glitch (spike
shaped noise) may be generated in the TOC0 pin output. Either create a circuit configuration that
will not malfunction even if a glitch is generated or make sure that the ENTO and ALV bits do not
change at the same time.
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