Operation Of 16-Bit Input Capture - Fujitsu MB91150 Series Hardware Manual

9.4.3

Operation of 16-bit Input Capture

When the set significant edge is detected, the 16-bit input capture can capture the 16-
bit free-run timer value to the capture register to generate an interrupt.
I Operation of 16-bit input capture
Figure 9.4-8 "Example of capture timing for the input capture" shows an example of capture
timing for the 16-bit input capture.
Figure 9.4-8 Example of capture timing for the input capture
Counter value
FFFFh
BFFFh
7FFFh
3FFFh
0000h
Reset
N0
N1
IN example
Data register 0
Data register 1
Data register example
Capture 0 interrupt
Capture 1 interrupt
Capture example interrupt
Capture 0 = rising edge
Capture 1 = falling edge
Capture example = both edges (example)
3FFFh
Not fixed
Not fixed
Not fixed
CHAPTER 9 MULTIFUNCTIONAL TIMER
BFFFh
7FFFh
An interrupt occurs again
because of a significant edge.
Clearing an interrupt by use of software
Time
BFFFh
245