ATMEL – AVR AT-Mega-128 Micro-controller

Product Description

ATMEL – AVR AT-Mega-128 Micro-controller is available in Embeded Studio. The ATMEL AVR® AT-mega-128 is a low-power CMOS 8-bit micro-controller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the AT-mega-128 achieves through puts approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. ATMEL – AVR AT-Mega-128 Micro-controller has best things in the house.

AT-Mega-128 Micro-controller

The Atmel® AVR® core combines a rich instruction set

with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. The ATmega128 provides the following features: 128Kbytes of In-System Programmable Flash with Read-While-Write capabilities, 4Kbytes EEPROM, 4Kbytes SRAM, 53 general purpose I/O lines, 32 general purpose working registers, Real Time Counter (RTC), four flexible Timer/Counters with compare modes and PWM, 2 USARTs, a byte oriented Two-wire Serial Interface, an 8- channel, 10-bit ADC with optional differential input stage with programmable gain, programmable Watchdog Timer with Internal Oscillator, an SPI serial port, IEEE std. 1149.1 compliant JTAG test interface, also used for accessing the On-chip Debug system and programming and six software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip functions until the next interrupt or Hardware Reset. In Power-save mode, the asynchronous timer continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except Asynchronous Timer and ADC, to minimize switching noise during ADC conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption. In Extended Standby mode, both the main Oscillator and the Asynchronous Timer continue to run. ATMEL offers the Q-Touch® library for embedding captive touch buttons, sliders and wheels functionality into AVR micro-controllers. The patented charge-transfer signal acquisition offers robust sensing and includes fully debouched reporting of touch keys and includes Adjacent Key Suppression® (AKS™) technology for unambiguous detection of key events. The easy-to-use Q-Touch Suite tool chain allows you to explore, develop and debug your own touch applications.

Peripheral Features

• – Two 8-bit Timer/Counters with Separate Pre-scalers and Compare Modes
• – Two Expanded 16-bit Timer/Counters with Separate Pre-scaler, Compare Mode and Capture Mode
• – Real Time Counter with Separate Oscillator – Two 8-bit PWM Channels
• – 6 PWM Channels with Programmable Resolution from 2 to 16 Bits
• – Output Compare Modulator
• – 8-channel, 10-bit ADC 8 Single-ended Channels 7 Differential Channels 2 Differential Channels with Programmable Gain at 1x, 10x, or 200x
• – Byte-oriented Two-wire Serial Interface
• – Dual Programmable Serial USARTs
• – Master/Slave SPI Serial Interface
• – Programmable Watchdog Timer with On-chip Oscillator
• – On-chip Analog Comparative