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
S3F80P5_UM_ REV1.00 COUNTER A
12 COUNTER A
OVERVIEW
The S3F80P5 microcontroller has one 8-bit counter called counter A. Counter A, which can be used to generate
the carrier frequency, has the following components (See Figure 12-1):
— Counter A control register, CACON
— 8-bit down counter with auto-reload function
— Two 8-bit reference data registers, CADATAH and CADATAL
Counter A has two functions:
— As a normal interval timer, generating a counter A interrupt (IRQ2, vector ECH) at programmed time intervals.
— To supply a clock source to the 16-bit timer/counter module, Timer 1, for generating the Timer 1 overflow
interrupt.
NOTE
The CPU clock should be faster than count A clock.
12-1