CMS32L051 User Manual |Chapter 5 Universal Timer Unit (Timer4)
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5.7.2 Noise filter
When the noise filter is invalid, it is only synchronized by the running clock of channel n (f
MCK
); When the
noise filter is valid, the two clocks are detected to be consistent after synchronization through the operating clock
of channel n (f
MCK
). The waveform of the TM4lmn input pin after passing through the noise filter circuit in the
case of noise filter ON or OFF is shown below.
Figure 5-41 Waveform of the TImn input pin in the case of noise filter ON or OFF
TImn pin
Noise filter OFF
Noise filter ON
Operation clock (f
MCK
).
Notice: The input waveform of the Tlmn pin is used to illustrate the operation of the noise filter ON or OFF. In
practice, the Tlmn input must be entered according to the high and low level widths of the Tlmn input
shown in the AC characteristics of the data sheet.
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