beautypg.com

Chapter 36 input capture, Overview, Features – FUJITSU MB91460 SERIES FR60 User Manual

Page 763

background image

747

Chapter 36 Input Capture

1.Overview

Chapter 36 Input Capture

1. Overview

Input Capture records the free-run timer count value using timing detected from an external signal. It is then
possible to calculate the time between signals using the record of the repeated count.

2. Features

• Format: Edge detection circuit + 16 bit buffer (capture register)

• Quantity: 4 groups = 8 channels (input capture channels 0/1, 2/3, 4/5, 6/7)

• Compatible timers:

Input capture channels 0/1 use free-run timer 0

Input capture channels 2/3 use free-run timer 1

Input capture channels 4/5 use free-run timer 4

Input capture channels 6/7 use free-run timer 5

• Edge Detection: Rising/falling/both edges

• Interrupt: Edge detection

• Capture value: Timer count value (0000

H

-FFFF

H

)

• Timer: Uses free-run timer 0

• Precision: 4/F

CLKP

, 16/F

CLKP

, 32/F

CLKP

, 64/F

CLKP

(Free-run timer count clock)

Buffer

Capture

Free-run timer 0

Edge

detection

circuit

pin

A

A

Free-run
timer
count value

Captured signal

Buffer value

A

A

t