Chapter 38 Reload Timer; Overview; Features - Fujitsu MB91460 SERIES FR60 User Manual

Chapter 38 Reload Timer

1. Overview

The reload timer uses a 16 bit down counter to detect the input signal trigger and perform a count down.
The count length is 16 bits.
Soft trigger
External event
Internal clock
or or
External event

2. Features

Operation: 2 kinds of operation are possible
• One-shot Operation
Initial output level
Reversed output level
• Reload Operation
Initial output level
Reversed output level
Format: 16 bit down counter with reload register
Quantity: 8 (Output: 8 channels TOT[0-7])
Clock mode: Select from two modes
• Internal clock mode
Count clock: CLKP/2, CLKP/8, CLKP/32, CLKP/64, CLKP/128
Activation triggers (4 types)
• External event clock mode
Count clock
Count active edge: Rising/falling/both edges of external event
Activation trigger: Software trigger
Cycle
(Example) When count clock = 16MHz, reload value = 15999
Count active edge: When in external event mode, choose from 3 types.
• External trigger (rising /falling/both edges)
Interrupt: Request generated by underflow
Other 1: Counter stop in software/can be reopened
Other 2: Control of other peripheral functions possible
• PPG activation trigger source:
Reload timer 0
Reload timer 1
Reload value
Reload
Down counter
: External event (TIN[7:0] pins)
: Cycle = count clock x (reload value + 1)
Cycle = 62.5ns x (15999+1) = 1.0ms
PPG0, PPG1
:
PPG2, PPG3
:
Reversal
Output value
Underflow
Latch
Chapter 38 Reload Timer
1.Overview
Pin
To PPG PPG
To A/D A/D
775