Fujitsu FR81S User Manual
CHAPTER 26: 16-BIT INPUT CAPTURE
2. Features
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : 16-BIT INPUT CAPTURE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
4
2. Features
This section explains features of the 16-bit input capture.
Functions of 16-bit Input Capture
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The 16-bit input capture consists of 4 independent external input pins, capture registers corresponding
to this pin, and capture control registers. When an edge of the input signal from the external pin is
detected, the value of the 16-bit free-run timer can be stored in the capture register and an interrupt is
generated simultaneously.
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3 types of trigger edge (rising edge, falling edge, and both edges) of the external input signal can be
selected and there is a register that indicates whether the trigger edge is rising or falling.
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The 4 input capture channels can be operated independently.
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An interrupt is generated when a valid edge from the external input is detected.
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Any desired free-run timer channel can be set for each compare unit.
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There are 4 input capture channels, input capture 0 through 3, for which any of free-run timers 0 through
2 can be selected as the input. This can be set at the free-run timer selection register (FRS1). See
"Free-run Timer Selection Register" of "CHAPTER: 16-BIT FREE-RUN TIMER" for details.
MB91520 Series
MN705-00010-1v0-E
993