LAPIS Semiconductor ML62Q1000 Series, User Manual, Page: 357 / 882

ML62Q1000 Series User's Manual
Chapter 9 Functional Timer (FTM)
FEUL62Q1000 9-37
9.3 Description of Operation
Four types of operation modes are available for the functional timer:
•
TIMER mode
•
CAPTURE mode
•
PWM1 mode
•
PWM2 mode
9.3.1 Common Sequence (Initial setting Common to All Modes)
FTMn starts operating through the FTCSTR register after the setting via steps 1 through 6 described below is performed.
During operation, the hardware states such as interrupt status can be checked and the cycle/event settings are updateable.
1: Mode setting (FTnMOD register)
Choose the TIMER/CAPTURE/PWMs mode using the FTnMOD register.
In addition, set the repeat mode/one-shot mode.
2: Clock setting (FTnCLK register)
Choose the timer clock and the count clock.
If the internal clock is chosen for the count clock, the frequency dividing ratio can also be set.
3: Trigger setting (FTnTRG0 register, FTnTRG1 register)
Use this setting when starting/stopping the counter by an event trigger.
In the FTnTRG0 register, choose the event trigger source and the action. In the FTnTRG1 register, choose the edge of
the event trigger/emergency stop.
4: Interrupt setting (FTnINTE register)
Set the interrupt source.
Choose from cycle/event (counter coincidence, duty, capture) and trigger start/stop interrupt.
5: Cycle/event setting (FTnP register, FTnEA register, FTnEB register, FTnDT register)
Set the cycle, data for counter coincidence, duty, and dead time, etc.
TIMER mode CAPTURE mode PWM1 mode PWM2 mode
FTnP register Cycle in repeat mode or timeout period in one-shot mode
FTnEA register
Coincident interrupt
setting value
(Capturing data)
Positive phase
output duty
Duty
FTnEB register
Coincident interrupt
setting value
Negative phase
output duty
(Unused)
FTnDT register Dead time for output (Unused)
Dead time for
output
Dead time for
output
The cycle is calculated as follows:
T
priod
=
FTnP + 1
(FTnP: 0x0001 to 0xFFFF)
Counting clock [Hz]