Flat Panel Television User Manual
Table Of Contents
- TOC
- 01-Overview
- 02-Address Space
- 03-Addressing Modes
- 04-Control Registers
- 05-Interrupt Structure
- 06-Instruction Set
- 07-Clock and Power Circuits
- 08-RESET
- 09-IO PORTS
- 10-BASIC TIMER and TIMER 0
- 11-Timer1
- 12-CounterA
- 13-Timer2
- 14-EMBEDDED Flash Memory Interface
- 15-Low Voltagge Detector
- 16-Electrical Data
- 17-Mechanical Data
- 18-Flash MCU
- 19-Development Tool
- TOC.pdf
COUNTER A S3F80P5_UM_ REV1.00
COUNTER A PULSE WIDTH CALCULATIONS
t
LOW
t
HIGH
t
LOW
To generate the above repeated waveform consisted of low period time, t
LOW
, and high period time, t
HIGH.
When CAOF = 0,
t
LOW
= (CADATAL + 2) × 1/Fx. 0H < CADATAL < 100H, where Fx = the selected clock.
t
HIGH
= (CADATAH + 2) × 1/Fx. 0H < CADATAH < 100H, where Fx = the selected clock.
When CAOF = 1,
t
LOW
= (CADATAH + 2) × 1/Fx. 0H < CADATAH < 100H, where Fx = the selected clock.
t
HIGH
= (CADATAL + 2) × 1/Fx. 0H < CADATAL < 100H, where Fx = the selected clock.
To make t
LOW
= 24 us and t
HIGH
= 15 us. f
OSC
= 4 MHz, FX = 4 MHz/4 = 1 MHz
[Method 1] When CAOF = 0,
t
LOW
= 24 us = (CADATAL + 2) / FX = (CADATAL + 2) x 1us, CADATAL = 22.
t
HIGH
= 15 us = (CADATAH + 2) / FX = (CADATAH + 2) x 1us, CADATAH = 13.
[Method 2] When CAOF = 1,
t
HIGH
= 15 us = (CADATAL + 2) / FX = (CADATAL + 2) x 1us, CADATAL = 13.
t
LOW
= 24 us = (CADATAH + 2) / FX = (CADATAH + 2) x 1us, CADATAH = 22.
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