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The ATMEGA88A-MMHR is a microcontroller from ATMEL (now part of Microchip Technology). Below are its specifications, descriptions, and features:

Specifications:

• Manufacturer: ATMEL (Microchip)
• Core: 8-bit AVR
• Flash Memory: 8KB
• SRAM: 1KB
• EEPROM: 512 Bytes
• Clock Speed: Up to 20MHz
• Operating Voltage: 1.8V - 5.5V
• Package: QFN-28 (5x5mm)
• I/O Pins: 23
• ADC Channels: 8 (10-bit resolution)
• Timers: 2 x 8-bit, 1 x 16-bit
• PWM Channels: 6
• USART: 1
• SPI: 1
• I2C (TWI): 1
• Watchdog Timer: Yes
• Operating Temperature: -40°C to +85°C

Descriptions:

• The ATMEGA88A-MMHR is a low-power, high-performance microcontroller based on the AVR RISC architecture.
• It features in-system self-programmable flash memory, making it suitable for embedded applications.
• The device supports real-time debugging via JTAG or debugWIRE interfaces.
• It is designed for cost-sensitive applications requiring efficient processing and low power consumption.

Features:

• Advanced RISC Architecture: 131 powerful instructions, most executed in a single clock cycle.
• Low Power Consumption: Multiple sleep modes for power efficiency.
• Peripheral Features:
• 8-channel 10-bit ADC
• Programmable Serial USART
• Master/Slave SPI Interface
• Byte-oriented Two-Wire Interface (TWI)
• Robustness: Brown-out detection, power-on reset, and watchdog timer for reliable operation.
• Flexible Clocking Options: Internal calibrated oscillator, external crystal, or resonator support.

This microcontroller is commonly used in industrial control, consumer electronics, and IoT applications.