Pulse-Width Count Timer (Timer 2) - Fujitsu F2MC-8L Family series Hardware Manual

Peripherals
Internal-data bus
Function switching circuit
Timing generator
8-bit down counter
RLBR
HARDWARE CONFIGURATION

2.2.3 Pulse-width Count Timer (Timer 2)

• This timer has timer and pulse-width measurement functions.
• The timer function has two modes: reload timer and one-shot.
• In the reload timer mode, the set values are counted down repeatedly.
• In the one-shot mode, counting down is started from the set values and
stops at the first underflow.
• The pulse-width measurement function enables measurement of High,
Low, or one-cycle widths of pulses input from pins.
• For inputting from pins, the 5-bit noise-clearing circuit is selectable.
(1) Block diagram
PCR2
NCCR
PCR1
Input-pulse edge
Selector
Noise clear
detector
1/2
1/8
CPU clock pulse*
1/64
* The CPU clock pulse is an oscillation-divided pulse.
2– 30
To PWM timer
IRQ3
From time-base
timer
Selector
P42/PWC/
INT1