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Rev.1.01 2007.02.16
RJJ10J1643-0101
12
2.4 Timer Driver
The timer driver sets the timer, clears timer settings, controls timer operation, and
acquires a counter value with respect to the following modes:
• Timer mode
• Event counter mode
• Pulse width modulation mode (PWM mode)
• Pulse period measurement mode
• Pulse width measurement mode
• Input capture mode
• Output compare mode
2.4.1 Timer Mode
In this mode, the timer counts the internally generated count source. When an
underflow or an overflow interrupt occurs, it calls a preset callback function.
2.4.2 Event Counter Mode
In this mode, the timer counts the external signal fed in from an input pin or an
overflow or underflow from other timer. When an underflow or an overflow interrupt
occurs, it calls a preset callback function.
2.4.3 Pulse Width Modulation Mode (PWM Mode)
In this mode, the timer outputs pulses in a given width successively. When an
underflow or an overflow interrupt occurs, it calls a preset callback function.
2.4.4 Pulse Period Measurement Mode
In this mode, the timer measures the pulse period of an external signal fed in from an
input pin. When an underflow or an overflow interrupt occurs, it calls a preset callback
function.
2.4.5 Pulse Width Measurement Mode
In this mode, the timer measures the pulse width of an external signal fed in from an
input pin. When an underflow or an overflow interrupt occurs, it calls a preset callback
function.
2.4.6 Input Capture Mode
In this mode, the timer latches the timer value upon an active signal edge or clock
pulse at an input pin, thereby generating an interrupt request. When an input capture
interrupt or an underflow or an overflow interrupt occurs, it calls a preset callback
function.