Overview Of Pwc Timer - Fujitsu F2MC-16LX Hardware Manual
Mb90470 series 16-bit microcontroller
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Also See for F2MC-16LX:
- Hardware manual (706 pages) ,
- Application note (13 pages) ,
- Operation manual (10 pages)
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CHAPTER 14 PWC TIMER
14.1 Overview of PWC Timer
The PWC timer is a 16-bit multifunctional up-count timer used to measure the pulse
width of input signals.
PWC: Pulse Width Count (for pulse width measurement)
I PWC timer functions
On the hardware level, the PWC timer consists of one 16-bit up-count timer, one input pulse
divider and divide ratio control register, one measurement input pin, and three 16-bit control
registers. When regarding each 16-bit control register as one channel, the PWC timer has a
total of three channels. The PWC timer provides the following functions.
❍ Timer function
•
Each time the timer function has been set, an interrupt request will be generated
•
An internal clock used as a reference clock can be selected from three types.
❍ Pulse width measurement function
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Measures the time between any events input from the outside via the pulse input
•
An internal clock used as a reference clock can be selected from three types
•
Various measurement modes
•
H pulse width (rising edge to falling edge)/L pulse width (rising edge to falling edge)
•
Rising interval (rising edge to rising edge)/falling interval (falling edge to falling edge)
•
Measurement between edges (rising edge or falling edge to falling edge or rising edge)
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An 8-bit input divider is used for divide measurement with "divide-by-22 x n" (n = 1,2,3,4) of
the input pulse.
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At the end of measurement, an interrupt can be generated.
•
Either one-time measurement or repeated measurement can be selected.
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