8051 Microcontroller Blog

These are samples for PCF8563 and 25AA020A[SPI- EEPROM]. The codes are for P89v664 controller on SDCC compiler. A slight modification can make these to run on KIEL.Read the README.txt before starting.Happy coding.... rtc spi samples.zip (93.05 kb)

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The main difference between them lies in the following points:Pin function: Pins almost identical changes were, in the AT89S51 in P1.5, P1.6, P1.7 have a second function, that is, the second 3-pin serial ISP function formed programming interface. Programmability: AT89C51 only supports parallel programming, But AT89S51 supports both parallel programming and ISP programming.Voltage in the programming area, AT89C51 in addition to normal programming voltage of 5V, another 12v is needed for Vpp. But AT89S51 just need to be 4-5V. [More]

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This program is used to control an LED brightness through PWM. Since the AT89S52 dont have a hardware PWM we are using an software PWM with help of the timer 0. By changing the duty cycle of the PWM signal we can control the brightness of the LED. The brightness is varied from 0-10. Here's the circuit diagram and the C code [More]

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This video explains you how to make a PCB with a laser printer.

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Check out this tutorial for writing C program using keil C Compiler. It has the following example programs with circuit diagram and C code. [More]

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Drive recorders capture images and information from immediately before and after an accident occurs, thus enabling users to understand the circumstances surrounding the accident. Their installation is also expected to have, to a certain degree, an accident-deterring effect. For these reasons, drive recorders are expected to enjoy an expanding market not only for use in trucks, buses, taxis, and other commercial vehicles but also in private vehicles. [More]

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Featuring Actel Fusion® mixed-signal FPGAs, the kit enables the development of system and power management applications in a single board with multiple on-board voltage regulators, an array of indicator LEDs, and an OLED display to provide direct feedback on flag status, system messages, and voltage, temperature, or current readings. The Fusion Advanced Development Kit provides significant resources for flexible system management development, including a web-enabled development environment, an ARM® Cortex™-M1-enabled mixed-signal Fusion device, and extensive digital and analog connectivity. This kit also serves as the platform for the Mixed-Signal Power Manager Demonstration, a reference design that delivers superior power monitoring, power sequencing and threshold control of up to 16 external power supplies. [More]

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Arrow and Atmel bring you a design challenge employing the world renowned low-power 8-bit AVR® flash microcontroller. The smarter the design, the better chance to win a smart fortwo car.

If your design delivers high performance, low power consumption, and flexibility, you could be eligible to win one of three top prizes from Arrow and Atmel at the Embedded Systems Conference, Silicon Valley 2010.

Submit the best design, and you can flaunt your smarts out on the streets! [More]

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Given that today's Smartphone integrates features like personal organizers and email management tools with basic multimedia and handset capabilities, the typical "ON" time is more crucial to the end users than that of an entry level mobile phone. The feature set drives the need for high processing power, larger (brighter) displays, touch screen controls and speaker phone capability. To meet performance and form factor requirements of the phone, careful consideration to the supply current and package sizes is important. Hence, migrating to Class-D audio amplifiers, touch screen controllers with integrated audio, ESD protection, power management and overall power supply efficiency are critical. [More]

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Fujitsu Microelectronics, one of the leading companies among semiconductor industries announced their low-pin-count series of 8-bit microcontrollers (MCUs). It is designed for cost-sensitive consumer applications.

The MB95200 series is an extension of the popular Fujitsu F²MC-8FX family of 8-bit microcontrollers [More]

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