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(4)
Example of Settings for Cycle Measurement Mode
Figure 11.12 shows an example of the flow when cycle measurement mode is to be used.
Start
Initialization
Set TCMMDS to 0
Set CST (TCMCR) to 0
Set TCMMLCM
Set TCMPIPE = 1
Set OVIE and MAXOVIE to 1
Set TCMMDS to 1
OVF = 1? or
MAXOVF = 1?
No
Set TCMMDS = 0
End of measurement
Figure 11.12 Example of Cycle Measurement Mode Settings
[1]
[2]
[3]
[4]
[5]
[6]
Yes
Interrupt is generated
[9]
MAXOVF = 1?
No
Processing for
external event stopped state
End of exception handling
Section 11 16-Bit Cycle Measurement Timer (TCM)
[1]
Set timer mode.
[2]
Stop TCMCNT and initialize to H'0000.
[3]
Set an upper limit on the measurement period.
[4]
Pin input enabled.
[5]
Enable interrupts.
[6]
Set speed measurement mode
to start speed measurement.
[7]
Processing for the external event stopped state.
[8]
Processing for cycle upper limit over.
[9]
Speed measurement is completed.
Yes
Processing for cycle
[7]
upper limit over
Rev. 1.00 May 09, 2008 Page 309 of 954
[8]
REJ09B0462-0100
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