ATMEGA48A-MMHR Atmel, ATMEGA48A-MMHR Datasheet - Page 559

• Manufacturer Part Number: ATMEGA48A-MMHR
• Description: IC MCU AVR 4K FLASH 28QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48A-MMHR

• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 20MHz
• Number Of I /o: 23
• Eeprom Size: 256 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8271C–AVR–08/10
9
10 System Control and Reset .................................................................... 47
11 Interrupts ................................................................................................ 58
12 External Interrupts ................................................................................. 71
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
Power Management and Sleep Modes ................................................. 39
8.8External Clock .........................................................................................................34
8.9Clock Output Buffer .................................................................................................35
8.10Timer/Counter Oscillator .......................................................................................35
8.11System Clock Prescaler ........................................................................................36
8.12Register Description ..............................................................................................37
9.1Sleep Modes ...........................................................................................................39
9.2BOD Disable
9.3Idle Mode .................................................................................................................40
9.4ADC Noise Reduction Mode ...................................................................................40
9.5Power-down Mode ..................................................................................................41
9.6Power-save Mode ...................................................................................................41
9.7Standby Mode .........................................................................................................41
9.8Extended Standby Mode .........................................................................................42
9.9Power Reduction Register .......................................................................................42
9.10Minimizing Power Consumption ............................................................................42
9.11Register Description ..............................................................................................44
10.1Resetting the AVR .................................................................................................47
10.2Reset Sources .......................................................................................................47
10.3Power-on Reset .....................................................................................................48
10.4External Reset .......................................................................................................49
10.5Brown-out Detection ..............................................................................................49
10.6Watchdog System Reset .......................................................................................50
10.7Internal Voltage Reference ....................................................................................50
10.8Watchdog Timer ....................................................................................................51
10.9Register Description ..............................................................................................55
11.1Interrupt Vectors in ATmega48A and ATmega48PA .............................................58
11.2Interrupt Vectors in ATmega88A and ATmega88PA .............................................60
11.3Interrupt Vectors in ATmega168A and ATmega168PA .........................................63
11.4Interrupt Vectors in ATmega328 and ATmega328P .............................................66
11.5Register Description ..............................................................................................69
12.1Pin Change Interrupt Timing .................................................................................71
(1)
.........................................................................................................40
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