20.1 Outline
Input capture (×4)
The input capture (ICU) generates an interrupt request to the CPU simultaneously with a storing operation
of current counter value of the 16-bit free-run timer to the ICU data register (IPCP) upon an input of a
trigger edge to the external pin.
There are four sets (four channels) of the input capture external pins and ICU data registers (ICDR),
enabling measurements of maximum of four events.
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The input capture has four sets of external pins (IN0 to IN3) and ICU registers (IPCP0~3), enabling
measurements of maximum of four events.
•
A trigger edge direction can be selected from rising/falling/both edges.
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The input capture can be set to generate an interrupt request at the storage timing of the counter value
of the 16-bit free-run counter to the ICU data register (IPCP).
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The input compare conforms to the extended intelligent I/O service (EI
•
The input capture function is suited for measurements of intervals (frequencies) and pulse-widths.
A reset clears the timer counter value for the 16-bit free-run timer to all zeroes.
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Chapter 20: 16-Bit I/O Timer
2
OS).
MB90580 Series