Pulse Width Measurement Operation - NEC V850ES/KE1+ User Manual

7.4.8 Pulse width measurement operation

The TM01 register can be used to measure the pulse width of the signal input to the TI010 and TI011 pins.
Measurement can be accomplished by operating the 16-bit timer/event counter 01 in the free-running timer mode
or by restarting the timer in synchronization with the signal input to the TI010 pin.
When an interrupt is generated, read the value of the valid capture register and measure the pulse width. Check
the TMC01.OVF01 flag. If it is set (to 1), clear it to 0 by software.
Figure 7-37. Block Diagram of Pulse Width Measurement (Free-Running Timer Mode)
Count clock
Edge
TI010 pin
detection
Edge
TI011 pin
detection
Figure 7-38. Block Diagram of Pulse Width Measurement
Count clock
Edge
TI010 pin
detection
Edge
TI011 pin
detection
CHAPTER 7 16-BIT TIMER/EVENT COUNTER 0
Operable bits
TMC013, TMC012
Capture signal
Capture
signal
(Clear & Start Mode Entered by TI010 Pin Valid Edge Input)
Operable bits
TMC013, TMC012
Capture signal
Capture
signal
User's Manual U16896EJ2V0UD
16-bit counter
(TM01)
Capture register
(CR011)
Capture register
(CR010)
Clear
16-bit counter
(TM01)
Capture register
(CR011)
Capture register
(CR010)
Interrupt signal
(INTTM011)
Interrupt signal
(INTTM010)
Interrupt signal
(INTTM011)
Interrupt signal
(INTTM010)
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