Week 13: FYP 1 Preparation and Presentation (15/10/2018)

On week 13, I've prepared a powerpoint slide for FYP 1 presentation. The presentation will be held on  17/10/2018 at Dewan Gemilang. The presentation starts at 2.30pm until 5.00pm.

Powerpoint Slide Presentation

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Week 12: Research and Finding (08/10/2018)

Crystal Oscillator

A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a moving crystal of piezoelectric material to form an electrical signal with a very precise frequency. This frequency is often used to keep track of your time (as in quartz wristwatches), to produce a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers. The foremost common style of electricity resonator used is that the quartz, therefore oscillator circuits incorporating them became called crystal oscillators,but alternative piezoelectric materials as well as polycry stalline ceramics are utilized in similar circuits.

                        

In the design of microprocessors and microcontrollers, crystal oscillators are used for the sake of providing the clock signals. In 8051 microcontroller an external oscillator circuit can work with 12MHz that's essential. This explicit oscillator that has cycle rate at 1MHz to 3.33MHz is used to generate clock pulses. It is required for the synchronization of all the internal operations.

Week 11: Research and Finding (5/10/2018)

AT89S52

The AT89S52 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port, and interrupt system to continue functioning. The Power Down Mode saves the RAM contents but freezes the oscillator, disabling all other chip functions until the next hardware reset. The Flash program memory supports both parallel programming and in Serial In-System Programming (ISP). The 89S52 is also In-Application Programmable (IAP), allowing the Flash program memory to be reconfigured even while the application is running.

AT89S52 Pin Diagram

AT89S52 Features:

Compatible with MCS-51 Products 
8K Bytes of In-System Reprogrammable Flash Memory 
Fully Static Operation: 0 Hz to 33 MHz 
Three-level Program Memory Lock 
256 x 8-bit Internal RAM 
32 Programmable I/O Lines 
Three 16-bit Timer/Counters 
Eight Interrupt Sources 
Programmable Serial Channel 
Low-power Idle and Power-down Modes 
4.0V to 5.5V Operating Range 
Full Duplex UART Serial Channel 
Interrupt Recovery from Power-down Mode 
Watchdog Timer