16-Bit Input Capture - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

20.4.3 16-bit input capture

In 16-bit input capture operation, an interrupt can be generated upon detection of a specified valid edge,
fetching the 16-bit free-run timer value and writing it to the capture register.
Sample input capture fetch timing
Capture 0: Rising edge
Capture 1: Falling edge
Capture example: Both edges
Counter value
FFFF
H
BFFF
H
7FFF
H
3FFF
H
0000
H
Reset
IN0
IN1
IN example
Capture 0
Undefined
Capture 1
Undefined
Capture
Undefined
example
Capture 0
interrupt
Capture 1
interrupt
Capture
interrupt
MB90580 Series
3FFF
H
BFFF
H
20.4 Operations
7FFF
H
7FFF
H
Chapter 20: 16-Bit I/O Timer
Time
287