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16-Bit Arithmetics
- This application shows how effective the AVR microcontrollers handle 16 bit arithmetic operations. Addition and subtraction of 16 bits numbers are handled in 2 clock cycles. Assembly code routines are included. -
Added: 10-Oct-2003
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4x4 Keypad-Wake Up on Keypress
- Very low power consumption can be achieved by keeping the AVR microcontroller in sleep mode while it is waiting for an event. This is demonstrated in this application, where the microcontroller wakes up from sleep mode when a key is pressed, performs some action and enters sleep mode again. -
Added: 10-Oct-2003
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8-bit Microcontroller Multiplexing LED Drive & a 4x4 Keypad
- This application is designed to show the versality of the AVR port configuration, and the efficiency of the rich instruction set. Only 15 dual function I/O pins are used to run a 4x4 keypad, a 4 digit multiplexed LED display with flashing colon, an industrial real time clock/ timer, a piezo-sounder and to control ON/OFF times for two loads. A complete program is included for the AT90S1200, which can easily be modified to run on any AVR microcontroller with 20 pins or more. -
Added: 11-Oct-2003
Hits : 63 Rating : No Rating (0) Votes : 0
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8-Bit Precision A/D Converter
- This application note describes how to perform a kind of dual slope A/D conversion with any AVR microcontroller. With this application an 8 bit resolution and a measurement range of 0 to VCC can be achieved within a maximum conversion time of 1.1ms. Component inaccuracy is eliminated by an auto calibration cycle before each conversion. -
Added: 14-Oct-2003
Hits : 35 Rating : No Rating (0) Votes : 0
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8-Point Moving Average Filter
- A moving average filter is a simple Low Pass FIR (Finite Impulse Response) filter commonly used for smoothening sampled data. An 8 bit moving average filter is implemented here to show how to use the addressing modes of the AVR architecture. -
Added: 10-Oct-2003
Hits : 34 Rating : No Rating (0) Votes : 0
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Accessing 16-bit I/O Registers (Design Note)
- This Application Note shows how to read and write the 16-bit registers in the AVR Microcontrollers. Since the AVR has an 8-bit I/O bus these registers must be written in two execution cycles. It explains how to safely read and write these 16-bit registers. -
Added: 8-Oct-2003
Hits : 24 Rating : No Rating (0) Votes : 0
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Accessing the AT90S1200 EEPROM
- This Application Note contains assembly routines for accessing the EEPROM for all AVR devices. Includes code for reading and writing EEPROM addresses sequentially and at random addresses. -
Added: 8-Oct-2003
Hits : 26 Rating : 
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AVR Hardware Design Considerations
- This Application Note covers the most common problems encountered when switching to a new microcontroller architecture like the AVR. Solutions and considerations for the most common design challenges are covered. -
Added: 8-Oct-2003
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BCD Arithmetics
- Routines for BCD arithmetics are listed in this application note. This includes conversion between 16 bits and 5 digits as well as between 8 bits and 2 digits. Additionally 2-digit addition and subtraction is described. -
Added: 10-Oct-2003
Hits : 33 Rating : No Rating (0) Votes : 0
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