ATmega48/V, ATmega88/V, ATmega168/V: 8-bit Microcontroller with 8K Bytes In-System Programmable Flash

ATmega48/V, ATmega88/V, ATmega168/V: 8-bit Microcontroller with 8K Bytes In-System Programmable Flash‌

‌Features‌
● High-performance, Low-power AVR® 8-bit Microcontroller
● Advanced RISC Architecture

· 131 Powerful Instructions, Most Executed in a Single Clock Cycle

· 32 × 8 General Purpose Working Registers

· Fully Static Operation

· Up to 20 MIPS Throughput at 20 MHz

· On-chip 2-cycle Multiplier
● Non-volatile Program and Data Memory

· 4/8/16K Bytes of In-System Self-programmable Flash (ATmega48/88/168)
Endurance: 10,000 Write/Erase Cycles

· Optional Boot Code Section with Independent Lock Bits for In-System Programming via On-chip Boot Program with True Read-While-Write Operation

· 256/512/512 Bytes EEPROM (ATmega48/88/168)
Endurance: 100,000 Write/Erase Cycles

· 512/1K/1K Bytes Internal SRAM (ATmega48/88/168)

· Software Security Programming Lock
● Peripheral Features

· Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes

· One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode

· Real Time Counter with Separate Oscillator

· Six PWM Channels

· 8-channel 10-bit ADC in TQFP and QFN/MLF Packages

· 6-channel 10-bit ADC in PDIP Package

· Programmable Serial USART

· Master/Slave SPI Serial Interface

· Byte-oriented 2-wire Serial Interface (Philips I²C Compatible)

· Programmable Watchdog Timer with Separate On-chip Oscillator

· On-chip Analog Comparator

· Interrupt and Wake-up on Pin Change
● Special Microcontroller Features

· Power-on Reset and Programmable Brown-out Detection

· Internal Calibrated Oscillator

· External and Internal Interrupt Sources

· Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and Standby
● I/O and Packages

· 23 Programmable I/O Lines

· 28-pin PDIP, 32-pin TQFP, 28-pad QFN/MLF, and 32-pad QFN/MLF
● Operating Voltage:

· ATmega48V/88V/168V: 1.8–5.5V, ATmega48/88/168: 2.7–5.5V
● Temperature Range: -40°C to 85°C
● Speed Grades:

· ATmega48V/88V/168V: 0–4 MHz @ 1.8–5.5V, 0–10 MHz @ 2.7–5.5V

· ATmega48/88/168: 0–10 MHz @ 2.7–5.5V, 0–20 MHz @ 4.5–5.5V
● Low Power Active Mode:

· 250 μA at 1 MHz, 1.8V

· 15 μA at 32 kHz, 1.8V (including oscillator)
● Power-down Mode: 0.1 μA at 1.8V

‌Overview‌
The ATmega48/88/168 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega48/88/168 achieves throughputs approaching 1 MIPS per MHz, allowing system designers to optimize power consumption versus processing speed.

Comparison between ATmega48, ATmega88, and ATmega168‌
The differences between the three devices, ATmega48, ATmega88, and ATmega168, are only in memory sizes, boot loader support, and interrupt vector sizes. Table 1 summarizes the differences in memory and interrupt vector sizes among the three devices.

‌

ATmega88 and ATmega168 support a true Read-While-Write Self-Programming mechanism. They have a separate Boot Loader Section, and the SPM instruction can only execute from this section. In ATmega48, the Read-While-Write feature is not supported, and there is no separate Boot Loader Section. The SPM instruction can execute from the entire Flash.