Fujitsu FR81S User Manual
CHAPTER 23: 32-BIT INPUT CAPTURE
1. Overview
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: 32-BIT INPUT CAPTURE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
3
1. Overview
This section explains the overview of the 32-bit input capture.
The input capture stores the count value of the 32-bit free-run timer at the timing when the signal from the
external source is detected. The time between signals can then be calculated from the count values that have
been recorded repeatedly. An interrupt can be generated when an effective edge from the external input pin is
detected.
Moreover, the cycle and the pulse width of the input effective edge can be measured.
Figure 1-1 Block Diagram
LIN Sync Field detection
Free-run timer
Capture
Buffer
Edge detection circuit
External pin ICU
Interrupt
MB91520 Series
MN705-00010-1v0-E
878