| Natmega328p | Device-specific definitions for the ATmega328P |
| Nadc | Analog-to-digital converter definitions |
| Nanalog_comparator | Analog comparator definitions |
| Narchitecture | AVR8 architecture characteristics |
| Nbootloader | Boot section and Flash region definitions |
| Nclock | Clock source and prescaler definitions |
| Ncpu | CPU register and status flag definitions |
| Ndebugwire | DebugWIRE characteristics |
| Ndevice | General ATmega328P device information |
| Neeprom | EEPROM characteristics |
| Nelectrical | Electrical characteristics of the ATmega328P |
| Nindustrial_85c | Industrial grade up to 85 degrees Celsius |
| Nindustrial_105c | Industrial grade up to 105 degrees Celsius |
| Nautomotive_125c | Automotive grade up to 125 degrees Celsius |
| Nunspecified | Used when no operating grade has been selected |
| Ncurrent_group | Datasheet pin groups used for aggregate current limits |
| Nerrata | Silicon revision and errata information |
| Nexternal_interrupts | External interrupt and pin-change definitions |
| Nfuse | Fuse byte identifiers and bit masks |
| Ngpio | GPIO characteristics of the ATmega328P |
| Nport | Port widths and bit masks |
| Ninterrupts | Interrupt vector table definitions |
| Nlock_bits | Lock-bit definitions |
| Nmemory | Memory sizes and address ranges |
| Npackage | Physical package and terminal definitions |
| Npdip28 | PDIP-28 package characteristics |
| Nmlf28 | MLF-28 package characteristics |
| Ntqfp32 | TQFP-32 package characteristics |
| Nmlf32 | MLF-32 package characteristics |
| Nunspecified | Fallback characteristics when no package is selected |
| Npin | Logical pin and alternate-function definitions |
| Ncapabilities | Capability masks for individual logical pins |
| Npower | Power management definitions |
| Nprogramming | Programming interface definitions |
| Npwm | PWM channel definitions |
| Nqtouch | QTouch support characteristics |
| Nregister_bits | Register bit positions and masks |
| Npinb | Bit positions for the PINB register |
| Nddrb | Bit positions for the DDRB register |
| Nportb | Bit positions for the PORTB register |
| Npinc | Bit positions for the PINC register |
| Nddrc | Bit positions for the DDRC register |
| Nportc | Bit positions for the PORTC register |
| Npind | Bit positions for the PIND register |
| Nddrd | Bit positions for the DDRD register |
| Nportd | Bit positions for the PORTD register |
| Nmcucr | Bit positions for the MCUCR register |
| Nadmux | Bit positions for the ADMUX register |
| Nadcsra | Bit positions for the ADCSRA register |
| Nadcsrb | Bit positions for the ADCSRB register |
| Ndidr0 | Bit positions for the DIDR0 register |
| Ndidr1 | Bit positions for the DIDR1 register |
| Ntccr0a | Bit positions for the TCCR0A register |
| Ntccr0b | Bit positions for the TCCR0B register |
| Ntimsk0 | Bit positions for the TIMSK0 register |
| Ntifr0 | Bit positions for the TIFR0 register |
| Ntccr1a | Bit positions for the TCCR1A register |
| Ntccr1b | Bit positions for the TCCR1B register |
| Ntccr1c | Bit positions for the TCCR1C register |
| Ntimsk1 | Bit positions for the TIMSK1 register |
| Ntifr1 | Bit positions for the TIFR1 register |
| Ntccr2a | Bit positions for the TCCR2A register |
| Ntccr2b | Bit positions for the TCCR2B register |
| Ntimsk2 | Bit positions for the TIMSK2 register |
| Ntifr2 | Bit positions for the TIFR2 register |
| Nassr | Bit positions for the ASSR register |
| Ngtccr | Bit positions for the GTCCR register |
| Nspcr | Bit positions for the SPCR register |
| Nspsr | Bit positions for the SPSR register |
| Nucsr0a | Bit positions for the UCSR0A register |
| Nucsr0b | Bit positions for the UCSR0B register |
| Nucsr0c | Bit positions for the UCSR0C register |
| Ntwcr | Bit positions for the TWCR register |
| Ntwsr | Bit positions for the TWSR register |
| Ntwar | Bit positions for the TWAR register |
| Ntwamr | Bit positions for the TWAMR register |
| Nacsr | Bit positions for the ACSR register |
| Neicra | Bit positions for the EICRA register |
| Neimsk | Bit positions for the EIMSK register |
| Neifr | Bit positions for the EIFR register |
| Npcicr | Bit positions for the PCICR register |
| Npcifr | Bit positions for the PCIFR register |
| Npcmsk0 | Bit positions for the PCMSK0 register |
| Npcmsk1 | Bit positions for the PCMSK1 register |
| Npcmsk2 | Bit positions for the PCMSK2 register |
| Nsreg | Bit positions for the SREG register |
| Nwdtcsr | Bit positions for the WDTCSR register |
| Nsmcr | Bit positions for the SMCR register |
| Nprr | Bit positions for the PRR register |
| Nmcusr | Bit positions for the MCUSR register |
| Nclkpr | Bit positions for the CLKPR register |
| Nosccal | Bit positions for the OSCCAL register |
| Nspmcsr | Bit positions for the SPMCSR register |
| Nregister_map | Register addresses and memory-space boundaries |
| Nreset | Reset and brown-out definitions |
| Nrtc | RTC-style Timer2 clock definitions |
| Nspi | SPI interface definitions |
| Ntimer | Timer/counter definitions |
| Ntimer0 | Timer0 hardware characteristics |
| Ntimer1 | Timer1 hardware characteristics |
| Ntimer2 | Timer2 hardware characteristics |
| Ntwi | Two-wire interface definitions |
| Nusart | USART interface definitions |
| Nwatchdog | Watchdog timer definitions |
1.15.0