// Automatically generated file. DO NOT EDIT.
// Generated by gen-device-avr.go from ATmega3290A.atdf, see http://packs.download.atmel.com/

//go:build avr && atmega3290a

// Device information for the ATmega3290A.
package avr

import (
	"runtime/volatile"
	"unsafe"
)

// Some information about this device.
const (
	DEVICE = "ATmega3290A"
	ARCH   = "AVR8"
	FAMILY = "megaAVR"
)

// Interrupts
const (
	IRQ_RESET        = 0  // External Pin,Power-on Reset,Brown-out Reset,Watchdog Reset,and JTAG AVR Reset. See Datasheet.
	IRQ_INT0         = 1  // External Interrupt Request 0
	IRQ_PCINT0       = 2  // Pin Change Interrupt Request 0
	IRQ_PCINT1       = 3  // Pin Change Interrupt Request 1
	IRQ_TIMER2_COMP  = 4  // Timer/Counter2 Compare Match
	IRQ_TIMER2_OVF   = 5  // Timer/Counter2 Overflow
	IRQ_TIMER1_CAPT  = 6  // Timer/Counter1 Capture Event
	IRQ_TIMER1_COMPA = 7  // Timer/Counter1 Compare Match A
	IRQ_TIMER1_COMPB = 8  // Timer/Counter Compare Match B
	IRQ_TIMER1_OVF   = 9  // Timer/Counter1 Overflow
	IRQ_TIMER0_COMP  = 10 // Timer/Counter0 Compare Match
	IRQ_TIMER0_OVF   = 11 // Timer/Counter0 Overflow
	IRQ_SPI_STC      = 12 // SPI Serial Transfer Complete
	IRQ_USART_RX     = 13 // USART, Rx Complete
	IRQ_USART_UDRE   = 14 // USART Data register Empty
	IRQ_USART0_TX    = 15 // USART0, Tx Complete
	IRQ_USI_START    = 16 // USI Start Condition
	IRQ_USI_OVERFLOW = 17 // USI Overflow
	IRQ_ANALOG_COMP  = 18 // Analog Comparator
	IRQ_ADC          = 19 // ADC Conversion Complete
	IRQ_EE_READY     = 20 // EEPROM Ready
	IRQ_SPM_READY    = 21 // Store Program Memory Read
	IRQ_LCD          = 22 // LCD Start of Frame
	IRQ_PCINT2       = 23 // Pin Change Interrupt Request 2
	IRQ_PCINT3       = 24 // Pin Change Interrupt Request 3
	IRQ_max          = 24 // Highest interrupt number on this device.
)

// Pseudo function call that is replaced by the compiler with the actual
// functions registered through interrupt.New.
//
//go:linkname callHandlers runtime/interrupt.callHandlers
func callHandlers(num int)

//export __vector_RESET
//go:interrupt
func interruptRESET() {
	callHandlers(IRQ_RESET)
}

//export __vector_INT0
//go:interrupt
func interruptINT0() {
	callHandlers(IRQ_INT0)
}

//export __vector_PCINT0
//go:interrupt
func interruptPCINT0() {
	callHandlers(IRQ_PCINT0)
}

//export __vector_PCINT1
//go:interrupt
func interruptPCINT1() {
	callHandlers(IRQ_PCINT1)
}

//export __vector_TIMER2_COMP
//go:interrupt
func interruptTIMER2_COMP() {
	callHandlers(IRQ_TIMER2_COMP)
}

//export __vector_TIMER2_OVF
//go:interrupt
func interruptTIMER2_OVF() {
	callHandlers(IRQ_TIMER2_OVF)
}

//export __vector_TIMER1_CAPT
//go:interrupt
func interruptTIMER1_CAPT() {
	callHandlers(IRQ_TIMER1_CAPT)
}

//export __vector_TIMER1_COMPA
//go:interrupt
func interruptTIMER1_COMPA() {
	callHandlers(IRQ_TIMER1_COMPA)
}

//export __vector_TIMER1_COMPB
//go:interrupt
func interruptTIMER1_COMPB() {
	callHandlers(IRQ_TIMER1_COMPB)
}

//export __vector_TIMER1_OVF
//go:interrupt
func interruptTIMER1_OVF() {
	callHandlers(IRQ_TIMER1_OVF)
}

//export __vector_TIMER0_COMP
//go:interrupt
func interruptTIMER0_COMP() {
	callHandlers(IRQ_TIMER0_COMP)
}

//export __vector_TIMER0_OVF
//go:interrupt
func interruptTIMER0_OVF() {
	callHandlers(IRQ_TIMER0_OVF)
}

//export __vector_SPI_STC
//go:interrupt
func interruptSPI_STC() {
	callHandlers(IRQ_SPI_STC)
}

//export __vector_USART_RX
//go:interrupt
func interruptUSART_RX() {
	callHandlers(IRQ_USART_RX)
}

//export __vector_USART_UDRE
//go:interrupt
func interruptUSART_UDRE() {
	callHandlers(IRQ_USART_UDRE)
}

//export __vector_USART0_TX
//go:interrupt
func interruptUSART0_TX() {
	callHandlers(IRQ_USART0_TX)
}

//export __vector_USI_START
//go:interrupt
func interruptUSI_START() {
	callHandlers(IRQ_USI_START)
}

//export __vector_USI_OVERFLOW
//go:interrupt
func interruptUSI_OVERFLOW() {
	callHandlers(IRQ_USI_OVERFLOW)
}

//export __vector_ANALOG_COMP
//go:interrupt
func interruptANALOG_COMP() {
	callHandlers(IRQ_ANALOG_COMP)
}

//export __vector_ADC
//go:interrupt
func interruptADC() {
	callHandlers(IRQ_ADC)
}

//export __vector_EE_READY
//go:interrupt
func interruptEE_READY() {
	callHandlers(IRQ_EE_READY)
}

//export __vector_SPM_READY
//go:interrupt
func interruptSPM_READY() {
	callHandlers(IRQ_SPM_READY)
}

//export __vector_LCD
//go:interrupt
func interruptLCD() {
	callHandlers(IRQ_LCD)
}

//export __vector_PCINT2
//go:interrupt
func interruptPCINT2() {
	callHandlers(IRQ_PCINT2)
}

//export __vector_PCINT3
//go:interrupt
func interruptPCINT3() {
	callHandlers(IRQ_PCINT3)
}

// Peripherals.
var (
	// Timer/Counter, 8-bit
	TCCR0A = (*volatile.Register8)(unsafe.Pointer(uintptr(0x44)))
	TCNT0  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x46)))
	OCR0A  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x47)))
	TIMSK0 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x6e)))
	TIFR0  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x35)))
	GTCCR  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x43)))

	// Timer/Counter, 16-bit
	TCCR1A = (*volatile.Register8)(unsafe.Pointer(uintptr(0x80)))
	TCCR1B = (*volatile.Register8)(unsafe.Pointer(uintptr(0x81)))
	TCCR1C = (*volatile.Register8)(unsafe.Pointer(uintptr(0x82)))
	TCNT1L = (*volatile.Register8)(unsafe.Pointer(uintptr(0x84)))
	TCNT1H = (*volatile.Register8)(unsafe.Pointer(uintptr(0x85)))
	OCR1AL = (*volatile.Register8)(unsafe.Pointer(uintptr(0x88)))
	OCR1AH = (*volatile.Register8)(unsafe.Pointer(uintptr(0x89)))
	OCR1BL = (*volatile.Register8)(unsafe.Pointer(uintptr(0x8a)))
	OCR1BH = (*volatile.Register8)(unsafe.Pointer(uintptr(0x8b)))
	ICR1L  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x86)))
	ICR1H  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x87)))
	TIMSK1 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x6f)))
	TIFR1  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x36)))

	// Timer/Counter, 8-bit Async
	TCCR2A = (*volatile.Register8)(unsafe.Pointer(uintptr(0xb0)))
	TCNT2  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xb2)))
	OCR2A  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xb3)))
	TIMSK2 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x70)))
	TIFR2  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x37)))
	ASSR   = (*volatile.Register8)(unsafe.Pointer(uintptr(0xb6)))

	// Watchdog Timer
	WDTCR = (*volatile.Register8)(unsafe.Pointer(uintptr(0x60)))

	// EEPROM
	EEARL = (*volatile.Register8)(unsafe.Pointer(uintptr(0x41)))
	EEARH = (*volatile.Register8)(unsafe.Pointer(uintptr(0x42)))
	EEDR  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x40)))
	EECR  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x3f)))

	// Serial Peripheral Interface
	SPCR = (*volatile.Register8)(unsafe.Pointer(uintptr(0x4c)))
	SPSR = (*volatile.Register8)(unsafe.Pointer(uintptr(0x4d)))
	SPDR = (*volatile.Register8)(unsafe.Pointer(uintptr(0x4e)))

	// I/O Port
	PORTA = (*volatile.Register8)(unsafe.Pointer(uintptr(0x22)))
	DDRA  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x21)))
	PINA  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x20)))

	// I/O Port
	PORTB = (*volatile.Register8)(unsafe.Pointer(uintptr(0x25)))
	DDRB  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x24)))
	PINB  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x23)))

	// I/O Port
	PORTC = (*volatile.Register8)(unsafe.Pointer(uintptr(0x28)))
	DDRC  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x27)))
	PINC  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x26)))

	// I/O Port
	PORTD = (*volatile.Register8)(unsafe.Pointer(uintptr(0x2b)))
	DDRD  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x2a)))
	PIND  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x29)))

	// I/O Port
	PORTE = (*volatile.Register8)(unsafe.Pointer(uintptr(0x2e)))
	DDRE  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x2d)))
	PINE  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x2c)))

	// I/O Port
	PORTF = (*volatile.Register8)(unsafe.Pointer(uintptr(0x31)))
	DDRF  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x30)))
	PINF  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x2f)))

	// I/O Port
	PORTG = (*volatile.Register8)(unsafe.Pointer(uintptr(0x34)))
	DDRG  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x33)))
	PING  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x32)))

	// I/O Port
	PORTH = (*volatile.Register8)(unsafe.Pointer(uintptr(0xda)))
	DDRH  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xd9)))
	PINH  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xd8)))

	// I/O Port
	PORTJ = (*volatile.Register8)(unsafe.Pointer(uintptr(0xdd)))
	DDRJ  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xdc)))
	PINJ  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xdb)))

	// Analog Comparator
	ADCSRB = (*volatile.Register8)(unsafe.Pointer(uintptr(0x7b)))
	ACSR   = (*volatile.Register8)(unsafe.Pointer(uintptr(0x50)))
	DIDR1  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x7f)))

	// JTAG Interface
	OCDR  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x51)))
	MCUCR = (*volatile.Register8)(unsafe.Pointer(uintptr(0x55)))
	MCUSR = (*volatile.Register8)(unsafe.Pointer(uintptr(0x54)))

	// Liquid Crystal Display
	LCDDR19 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xff)))
	LCDDR18 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xfe)))
	LCDDR17 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xfd)))
	LCDDR16 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xfc)))
	LCDDR15 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xfb)))
	LCDDR14 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xfa)))
	LCDDR13 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf9)))
	LCDDR12 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf8)))
	LCDDR11 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf7)))
	LCDDR10 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf6)))
	LCDDR09 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf5)))
	LCDDR08 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf4)))
	LCDDR07 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf3)))
	LCDDR06 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf2)))
	LCDDR05 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf1)))
	LCDDR04 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xf0)))
	LCDDR03 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xef)))
	LCDDR02 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xee)))
	LCDDR01 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xed)))
	LCDDR00 = (*volatile.Register8)(unsafe.Pointer(uintptr(0xec)))
	LCDCCR  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xe7)))
	LCDFRR  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xe6)))
	LCDCRB  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xe5)))
	LCDCRA  = (*volatile.Register8)(unsafe.Pointer(uintptr(0xe4)))

	// External Interrupts
	EICRA  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x69)))
	EIMSK  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x3d)))
	EIFR   = (*volatile.Register8)(unsafe.Pointer(uintptr(0x3c)))
	PCMSK3 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x73)))
	PCMSK2 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x6d)))
	PCMSK1 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x6c)))
	PCMSK0 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x6b)))

	// CPU Registers
	SREG   = (*volatile.Register8)(unsafe.Pointer(uintptr(0x5f)))
	SPL    = (*volatile.Register8)(unsafe.Pointer(uintptr(0x5d)))
	SPH    = (*volatile.Register8)(unsafe.Pointer(uintptr(0x5e)))
	OSCCAL = (*volatile.Register8)(unsafe.Pointer(uintptr(0x66)))
	CLKPR  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x61)))
	PRR    = (*volatile.Register8)(unsafe.Pointer(uintptr(0x64)))
	SMCR   = (*volatile.Register8)(unsafe.Pointer(uintptr(0x53)))
	GPIOR2 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x4b)))
	GPIOR1 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x4a)))
	GPIOR0 = (*volatile.Register8)(unsafe.Pointer(uintptr(0x3e)))

	// Universal Serial Interface
	USIDR = (*volatile.Register8)(unsafe.Pointer(uintptr(0xba)))
	USISR = (*volatile.Register8)(unsafe.Pointer(uintptr(0xb9)))
	USICR = (*volatile.Register8)(unsafe.Pointer(uintptr(0xb8)))

	// Analog-to-Digital Converter
	ADMUX  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x7c)))
	ADCSRA = (*volatile.Register8)(unsafe.Pointer(uintptr(0x7a)))
	ADCL   = (*volatile.Register8)(unsafe.Pointer(uintptr(0x78)))
	ADCH   = (*volatile.Register8)(unsafe.Pointer(uintptr(0x79)))
	DIDR0  = (*volatile.Register8)(unsafe.Pointer(uintptr(0x7e)))

	// Bootloader
	SPMCSR = (*volatile.Register8)(unsafe.Pointer(uintptr(0x57)))

	// USART
	UDR0   = (*volatile.Register8)(unsafe.Pointer(uintptr(0xc6)))
	UCSR0A = (*volatile.Register8)(unsafe.Pointer(uintptr(0xc0)))
	UCSR0B = (*volatile.Register8)(unsafe.Pointer(uintptr(0xc1)))
	UCSR0C = (*volatile.Register8)(unsafe.Pointer(uintptr(0xc2)))
	UBRR0L = (*volatile.Register8)(unsafe.Pointer(uintptr(0xc4)))
	UBRR0H = (*volatile.Register8)(unsafe.Pointer(uintptr(0xc5)))

	// Fuses
	EXTENDED = (*volatile.Register8)(unsafe.Pointer(uintptr(0x2)))
	HIGH     = (*volatile.Register8)(unsafe.Pointer(uintptr(0x1)))
	LOW      = (*volatile.Register8)(unsafe.Pointer(uintptr(0x0)))

	// Lockbits
	LOCKBIT = (*volatile.Register8)(unsafe.Pointer(uintptr(0x0)))
)

// Bitfields for FUSE: Fuses
const (
	// EXTENDED
	EXTENDED_BODLEVEL0    = 0x2 // Brown-out Detector trigger level
	EXTENDED_BODLEVEL1    = 0x4 // Brown-out Detector trigger level
	EXTENDED_BODLEVEL_Msk = 0x6 // Brown-out Detector trigger level
	EXTENDED_RSTDISBL     = 0x1 // External Reset Disable
	EXTENDED_RSTDISBL_Msk = 0x1 // External Reset Disable

	// HIGH
	HIGH_OCDEN       = 0x80 // On-Chip Debug Enabled
	HIGH_OCDEN_Msk   = 0x80 // On-Chip Debug Enabled
	HIGH_JTAGEN      = 0x40 // JTAG Interface Enabled
	HIGH_JTAGEN_Msk  = 0x40 // JTAG Interface Enabled
	HIGH_SPIEN       = 0x20 // Serial program downloading (SPI) enabled
	HIGH_SPIEN_Msk   = 0x20 // Serial program downloading (SPI) enabled
	HIGH_WDTON       = 0x10 // Watchdog timer always on
	HIGH_WDTON_Msk   = 0x10 // Watchdog timer always on
	HIGH_EESAVE      = 0x8  // Preserve EEPROM memory through the Chip Erase cycle
	HIGH_EESAVE_Msk  = 0x8  // Preserve EEPROM memory through the Chip Erase cycle
	HIGH_BOOTSZ0     = 0x2  // Select Boot Size
	HIGH_BOOTSZ1     = 0x4  // Select Boot Size
	HIGH_BOOTSZ_Msk  = 0x6  // Select Boot Size
	HIGH_BOOTRST     = 0x1  // Boot Reset vector Enabled
	HIGH_BOOTRST_Msk = 0x1  // Boot Reset vector Enabled

	// LOW
	LOW_CKDIV8        = 0x80 // Divide clock by 8 internally
	LOW_CKDIV8_Msk    = 0x80 // Divide clock by 8 internally
	LOW_CKOUT         = 0x40 // Clock output on PORTE7
	LOW_CKOUT_Msk     = 0x40 // Clock output on PORTE7
	LOW_SUT_CKSEL0    = 0x1  // Select Clock Source
	LOW_SUT_CKSEL1    = 0x2  // Select Clock Source
	LOW_SUT_CKSEL2    = 0x4  // Select Clock Source
	LOW_SUT_CKSEL3    = 0x8  // Select Clock Source
	LOW_SUT_CKSEL4    = 0x10 // Select Clock Source
	LOW_SUT_CKSEL5    = 0x20 // Select Clock Source
	LOW_SUT_CKSEL_Msk = 0x3f // Select Clock Source
)

// Bitfields for LOCKBIT: Lockbits
const (
	// LOCKBIT
	LOCKBIT_LB0      = 0x1  // Memory Lock
	LOCKBIT_LB1      = 0x2  // Memory Lock
	LOCKBIT_LB_Msk   = 0x3  // Memory Lock
	LOCKBIT_BLB00    = 0x4  // Boot Loader Protection Mode
	LOCKBIT_BLB01    = 0x8  // Boot Loader Protection Mode
	LOCKBIT_BLB0_Msk = 0xc  // Boot Loader Protection Mode
	LOCKBIT_BLB10    = 0x10 // Boot Loader Protection Mode
	LOCKBIT_BLB11    = 0x20 // Boot Loader Protection Mode
	LOCKBIT_BLB1_Msk = 0x30 // Boot Loader Protection Mode
)

// Bitfields for TC0: Timer/Counter, 8-bit
const (
	// TCCR0A: Timer/Counter0 Control Register
	TCCR0A_FOC0A     = 0x80 // Force Output Compare
	TCCR0A_FOC0A_Msk = 0x80 // Force Output Compare
	TCCR0A_WGM00     = 0x40 // Waveform Generation Mode 0
	TCCR0A_WGM00_Msk = 0x40 // Waveform Generation Mode 0
	TCCR0A_COM0A0    = 0x10 // Compare Match Output Modes
	TCCR0A_COM0A1    = 0x20 // Compare Match Output Modes
	TCCR0A_COM0A_Msk = 0x30 // Compare Match Output Modes
	TCCR0A_WGM01     = 0x8  // Waveform Generation Mode 1
	TCCR0A_WGM01_Msk = 0x8  // Waveform Generation Mode 1
	TCCR0A_CS00      = 0x1  // Clock Selects
	TCCR0A_CS01      = 0x2  // Clock Selects
	TCCR0A_CS02      = 0x4  // Clock Selects
	TCCR0A_CS0_Msk   = 0x7  // Clock Selects

	// TIMSK0: Timer/Counter0 Interrupt Mask Register
	TIMSK0_OCIE0A     = 0x2 // Timer/Counter0 Output Compare Match Interrupt Enable
	TIMSK0_OCIE0A_Msk = 0x2 // Timer/Counter0 Output Compare Match Interrupt Enable
	TIMSK0_TOIE0      = 0x1 // Timer/Counter0 Overflow Interrupt Enable
	TIMSK0_TOIE0_Msk  = 0x1 // Timer/Counter0 Overflow Interrupt Enable

	// TIFR0: Timer/Counter0 Interrupt Flag register
	TIFR0_OCF0A     = 0x2 // Timer/Counter0 Output Compare Flag 0
	TIFR0_OCF0A_Msk = 0x2 // Timer/Counter0 Output Compare Flag 0
	TIFR0_TOV0      = 0x1 // Timer/Counter0 Overflow Flag
	TIFR0_TOV0_Msk  = 0x1 // Timer/Counter0 Overflow Flag

	// GTCCR: General Timer/Control Register
	GTCCR_TSM       = 0x80 // Timer/Counter Synchronization Mode
	GTCCR_TSM_Msk   = 0x80 // Timer/Counter Synchronization Mode
	GTCCR_PSR10     = 0x1  // Prescaler Reset Timer/Counter1 and Timer/Counter0
	GTCCR_PSR10_Msk = 0x1  // Prescaler Reset Timer/Counter1 and Timer/Counter0
)

// Bitfields for TC1: Timer/Counter, 16-bit
const (
	// TCCR1A: Timer/Counter1 Control Register A
	TCCR1A_COM1A0    = 0x40 // Compare Output Mode 1A, bits
	TCCR1A_COM1A1    = 0x80 // Compare Output Mode 1A, bits
	TCCR1A_COM1A_Msk = 0xc0 // Compare Output Mode 1A, bits
	TCCR1A_COM1B0    = 0x10 // Compare Output Mode 1B, bits
	TCCR1A_COM1B1    = 0x20 // Compare Output Mode 1B, bits
	TCCR1A_COM1B_Msk = 0x30 // Compare Output Mode 1B, bits
	TCCR1A_WGM10     = 0x1  // Waveform Generation Mode
	TCCR1A_WGM11     = 0x2  // Waveform Generation Mode
	TCCR1A_WGM1_Msk  = 0x3  // Waveform Generation Mode

	// TCCR1B: Timer/Counter1 Control Register B
	TCCR1B_ICNC1     = 0x80 // Input Capture 1 Noise Canceler
	TCCR1B_ICNC1_Msk = 0x80 // Input Capture 1 Noise Canceler
	TCCR1B_ICES1     = 0x40 // Input Capture 1 Edge Select
	TCCR1B_ICES1_Msk = 0x40 // Input Capture 1 Edge Select
	TCCR1B_WGM10     = 0x8  // Waveform Generation Mode
	TCCR1B_WGM11     = 0x10 // Waveform Generation Mode
	TCCR1B_WGM1_Msk  = 0x18 // Waveform Generation Mode
	TCCR1B_CS10      = 0x1  // Prescaler source of Timer/Counter 1
	TCCR1B_CS11      = 0x2  // Prescaler source of Timer/Counter 1
	TCCR1B_CS12      = 0x4  // Prescaler source of Timer/Counter 1
	TCCR1B_CS1_Msk   = 0x7  // Prescaler source of Timer/Counter 1

	// TCCR1C: Timer/Counter 1 Control Register C
	TCCR1C_FOC1A     = 0x80 // Force Output Compare 1A
	TCCR1C_FOC1A_Msk = 0x80 // Force Output Compare 1A
	TCCR1C_FOC1B     = 0x40 // Force Output Compare 1B
	TCCR1C_FOC1B_Msk = 0x40 // Force Output Compare 1B

	// TIMSK1: Timer/Counter1 Interrupt Mask Register
	TIMSK1_ICIE1      = 0x20 // Timer/Counter1 Input Capture Interrupt Enable
	TIMSK1_ICIE1_Msk  = 0x20 // Timer/Counter1 Input Capture Interrupt Enable
	TIMSK1_OCIE1B     = 0x4  // Timer/Counter1 Output Compare B Match Interrupt Enable
	TIMSK1_OCIE1B_Msk = 0x4  // Timer/Counter1 Output Compare B Match Interrupt Enable
	TIMSK1_OCIE1A     = 0x2  // Timer/Counter1 Output Compare A Match Interrupt Enable
	TIMSK1_OCIE1A_Msk = 0x2  // Timer/Counter1 Output Compare A Match Interrupt Enable
	TIMSK1_TOIE1      = 0x1  // Timer/Counter1 Overflow Interrupt Enable
	TIMSK1_TOIE1_Msk  = 0x1  // Timer/Counter1 Overflow Interrupt Enable

	// TIFR1: Timer/Counter1 Interrupt Flag register
	TIFR1_ICF1      = 0x20 // Input Capture Flag 1
	TIFR1_ICF1_Msk  = 0x20 // Input Capture Flag 1
	TIFR1_OCF1B     = 0x4  // Output Compare Flag 1B
	TIFR1_OCF1B_Msk = 0x4  // Output Compare Flag 1B
	TIFR1_OCF1A     = 0x2  // Output Compare Flag 1A
	TIFR1_OCF1A_Msk = 0x2  // Output Compare Flag 1A
	TIFR1_TOV1      = 0x1  // Timer/Counter1 Overflow Flag
	TIFR1_TOV1_Msk  = 0x1  // Timer/Counter1 Overflow Flag
)

// Bitfields for TC2: Timer/Counter, 8-bit Async
const (
	// TCCR2A: Timer/Counter2 Control Register
	TCCR2A_FOC2A     = 0x80 // Force Output Compare A
	TCCR2A_FOC2A_Msk = 0x80 // Force Output Compare A
	TCCR2A_WGM20     = 0x40 // Waveform Generation Mode
	TCCR2A_WGM20_Msk = 0x40 // Waveform Generation Mode
	TCCR2A_COM2A0    = 0x10 // Compare Output Mode bits
	TCCR2A_COM2A1    = 0x20 // Compare Output Mode bits
	TCCR2A_COM2A_Msk = 0x30 // Compare Output Mode bits
	TCCR2A_WGM21     = 0x8  // Waveform Generation Mode
	TCCR2A_WGM21_Msk = 0x8  // Waveform Generation Mode
	TCCR2A_CS20      = 0x1  // Clock Select bits
	TCCR2A_CS21      = 0x2  // Clock Select bits
	TCCR2A_CS22      = 0x4  // Clock Select bits
	TCCR2A_CS2_Msk   = 0x7  // Clock Select bits

	// TIMSK2: Timer/Counter2 Interrupt Mask register
	TIMSK2_OCIE2A     = 0x2 // Timer/Counter2 Output Compare Match Interrupt Enable
	TIMSK2_OCIE2A_Msk = 0x2 // Timer/Counter2 Output Compare Match Interrupt Enable
	TIMSK2_TOIE2      = 0x1 // Timer/Counter2 Overflow Interrupt Enable
	TIMSK2_TOIE2_Msk  = 0x1 // Timer/Counter2 Overflow Interrupt Enable

	// TIFR2: Timer/Counter2 Interrupt Flag Register
	TIFR2_OCF2A     = 0x2 // Timer/Counter2 Output Compare Flag 2
	TIFR2_OCF2A_Msk = 0x2 // Timer/Counter2 Output Compare Flag 2
	TIFR2_TOV2      = 0x1 // Timer/Counter2 Overflow Flag
	TIFR2_TOV2_Msk  = 0x1 // Timer/Counter2 Overflow Flag

	// ASSR: Asynchronous Status Register
	ASSR_EXCLK      = 0x10 // Enable External Clock Interrupt
	ASSR_EXCLK_Msk  = 0x10 // Enable External Clock Interrupt
	ASSR_AS2        = 0x8  // AS2: Asynchronous Timer/Counter2
	ASSR_AS2_Msk    = 0x8  // AS2: Asynchronous Timer/Counter2
	ASSR_TCN2UB     = 0x4  // TCN2UB: Timer/Counter2 Update Busy
	ASSR_TCN2UB_Msk = 0x4  // TCN2UB: Timer/Counter2 Update Busy
	ASSR_OCR2UB     = 0x2  // Output Compare Register2 Update Busy
	ASSR_OCR2UB_Msk = 0x2  // Output Compare Register2 Update Busy
	ASSR_TCR2UB     = 0x1  // TCR2UB: Timer/Counter Control Register2 Update Busy
	ASSR_TCR2UB_Msk = 0x1  // TCR2UB: Timer/Counter Control Register2 Update Busy
)

// Bitfields for WDT: Watchdog Timer
const (
	// WDTCR: Watchdog Timer Control Register
	WDTCR_WDCE     = 0x10 // Watchdog Change Enable
	WDTCR_WDCE_Msk = 0x10 // Watchdog Change Enable
	WDTCR_WDE      = 0x8  // Watch Dog Enable
	WDTCR_WDE_Msk  = 0x8  // Watch Dog Enable
	WDTCR_WDP0     = 0x1  // Watch Dog Timer Prescaler bits
	WDTCR_WDP1     = 0x2  // Watch Dog Timer Prescaler bits
	WDTCR_WDP2     = 0x4  // Watch Dog Timer Prescaler bits
	WDTCR_WDP_Msk  = 0x7  // Watch Dog Timer Prescaler bits
)

// Bitfields for EEPROM: EEPROM
const (
	// EECR: EEPROM Control Register
	EECR_EERIE     = 0x8 // EEPROM Ready Interrupt Enable
	EECR_EERIE_Msk = 0x8 // EEPROM Ready Interrupt Enable
	EECR_EEMWE     = 0x4 // EEPROM Master Write Enable
	EECR_EEMWE_Msk = 0x4 // EEPROM Master Write Enable
	EECR_EEWE      = 0x2 // EEPROM Write Enable
	EECR_EEWE_Msk  = 0x2 // EEPROM Write Enable
	EECR_EERE      = 0x1 // EEPROM Read Enable
	EECR_EERE_Msk  = 0x1 // EEPROM Read Enable
)

// Bitfields for SPI: Serial Peripheral Interface
const (
	// SPCR: SPI Control Register
	SPCR_SPIE     = 0x80 // SPI Interrupt Enable
	SPCR_SPIE_Msk = 0x80 // SPI Interrupt Enable
	SPCR_SPE      = 0x40 // SPI Enable
	SPCR_SPE_Msk  = 0x40 // SPI Enable
	SPCR_DORD     = 0x20 // Data Order
	SPCR_DORD_Msk = 0x20 // Data Order
	SPCR_MSTR     = 0x10 // Master/Slave Select
	SPCR_MSTR_Msk = 0x10 // Master/Slave Select
	SPCR_CPOL     = 0x8  // Clock polarity
	SPCR_CPOL_Msk = 0x8  // Clock polarity
	SPCR_CPHA     = 0x4  // Clock Phase
	SPCR_CPHA_Msk = 0x4  // Clock Phase
	SPCR_SPR0     = 0x1  // SPI Clock Rate Selects
	SPCR_SPR1     = 0x2  // SPI Clock Rate Selects
	SPCR_SPR_Msk  = 0x3  // SPI Clock Rate Selects

	// SPSR: SPI Status Register
	SPSR_SPIF      = 0x80 // SPI Interrupt Flag
	SPSR_SPIF_Msk  = 0x80 // SPI Interrupt Flag
	SPSR_WCOL      = 0x40 // Write Collision Flag
	SPSR_WCOL_Msk  = 0x40 // Write Collision Flag
	SPSR_SPI2X     = 0x1  // Double SPI Speed Bit
	SPSR_SPI2X_Msk = 0x1  // Double SPI Speed Bit
)

// Bitfields for AC: Analog Comparator
const (
	// ADCSRB: ADC Control and Status Register B
	ADCSRB_ACME     = 0x40 // Analog Comparator Multiplexer Enable
	ADCSRB_ACME_Msk = 0x40 // Analog Comparator Multiplexer Enable

	// ACSR: Analog Comparator Control And Status Register
	ACSR_ACD      = 0x80 // Analog Comparator Disable
	ACSR_ACD_Msk  = 0x80 // Analog Comparator Disable
	ACSR_ACBG     = 0x40 // Analog Comparator Bandgap Select
	ACSR_ACBG_Msk = 0x40 // Analog Comparator Bandgap Select
	ACSR_ACO      = 0x20 // Analog Compare Output
	ACSR_ACO_Msk  = 0x20 // Analog Compare Output
	ACSR_ACI      = 0x10 // Analog Comparator Interrupt Flag
	ACSR_ACI_Msk  = 0x10 // Analog Comparator Interrupt Flag
	ACSR_ACIE     = 0x8  // Analog Comparator Interrupt Enable
	ACSR_ACIE_Msk = 0x8  // Analog Comparator Interrupt Enable
	ACSR_ACIC     = 0x4  // Analog Comparator Input Capture Enable
	ACSR_ACIC_Msk = 0x4  // Analog Comparator Input Capture Enable
	ACSR_ACIS0    = 0x1  // Analog Comparator Interrupt Mode Select bits
	ACSR_ACIS1    = 0x2  // Analog Comparator Interrupt Mode Select bits
	ACSR_ACIS_Msk = 0x3  // Analog Comparator Interrupt Mode Select bits

	// DIDR1: Digital Input Disable Register 1
	DIDR1_AIN1D     = 0x2 // AIN1 Digital Input Disable
	DIDR1_AIN1D_Msk = 0x2 // AIN1 Digital Input Disable
	DIDR1_AIN0D     = 0x1 // AIN0 Digital Input Disable
	DIDR1_AIN0D_Msk = 0x1 // AIN0 Digital Input Disable
)

// Bitfields for JTAG: JTAG Interface
const (
	// MCUCR: MCU Control Register
	MCUCR_JTD     = 0x80 // JTAG Interface Disable
	MCUCR_JTD_Msk = 0x80 // JTAG Interface Disable

	// MCUSR: MCU Status Register
	MCUSR_JTRF     = 0x10 // JTAG Reset Flag
	MCUSR_JTRF_Msk = 0x10 // JTAG Reset Flag
)

// Bitfields for LCD: Liquid Crystal Display
const (
	// LCDCCR: LCD Contrast Control Register
	LCDCCR_LCDDC0    = 0x20 // LCD Display Configuration
	LCDCCR_LCDDC1    = 0x40 // LCD Display Configuration
	LCDCCR_LCDDC2    = 0x80 // LCD Display Configuration
	LCDCCR_LCDDC_Msk = 0xe0 // LCD Display Configuration
	LCDCCR_LCDCC0    = 0x1  // LCD Contrast Control
	LCDCCR_LCDCC1    = 0x2  // LCD Contrast Control
	LCDCCR_LCDCC2    = 0x4  // LCD Contrast Control
	LCDCCR_LCDCC3    = 0x8  // LCD Contrast Control
	LCDCCR_LCDCC_Msk = 0xf  // LCD Contrast Control

	// LCDFRR: LCD Frame Rate Register
	LCDFRR_LCDPS0    = 0x10 // LCD Prescaler Selects
	LCDFRR_LCDPS1    = 0x20 // LCD Prescaler Selects
	LCDFRR_LCDPS2    = 0x40 // LCD Prescaler Selects
	LCDFRR_LCDPS_Msk = 0x70 // LCD Prescaler Selects
	LCDFRR_LCDCD0    = 0x1  // LCD Clock Dividers
	LCDFRR_LCDCD1    = 0x2  // LCD Clock Dividers
	LCDFRR_LCDCD2    = 0x4  // LCD Clock Dividers
	LCDFRR_LCDCD_Msk = 0x7  // LCD Clock Dividers

	// LCDCRB: LCD Control and Status Register B
	LCDCRB_LCDCS      = 0x80 // LCD CLock Select
	LCDCRB_LCDCS_Msk  = 0x80 // LCD CLock Select
	LCDCRB_LCD2B      = 0x40 // LCD 1/2 Bias Select
	LCDCRB_LCD2B_Msk  = 0x40 // LCD 1/2 Bias Select
	LCDCRB_LCDMUX0    = 0x10 // LCD Mux Selects
	LCDCRB_LCDMUX1    = 0x20 // LCD Mux Selects
	LCDCRB_LCDMUX_Msk = 0x30 // LCD Mux Selects
	LCDCRB_LCDPM0     = 0x1  // LCD Port Masks
	LCDCRB_LCDPM1     = 0x2  // LCD Port Masks
	LCDCRB_LCDPM2     = 0x4  // LCD Port Masks
	LCDCRB_LCDPM3     = 0x8  // LCD Port Masks
	LCDCRB_LCDPM_Msk  = 0xf  // LCD Port Masks

	// LCDCRA: LCD Control and Status Register A
	LCDCRA_LCDEN     = 0x80 // LCD Enable
	LCDCRA_LCDEN_Msk = 0x80 // LCD Enable
	LCDCRA_LCDAB     = 0x40 // LCD A or B waveform
	LCDCRA_LCDAB_Msk = 0x40 // LCD A or B waveform
	LCDCRA_LCDIF     = 0x10 // LCD Interrupt Flag
	LCDCRA_LCDIF_Msk = 0x10 // LCD Interrupt Flag
	LCDCRA_LCDIE     = 0x8  // LCD Interrupt Enable
	LCDCRA_LCDIE_Msk = 0x8  // LCD Interrupt Enable
	LCDCRA_LCDBL     = 0x1  // LCD Blanking
	LCDCRA_LCDBL_Msk = 0x1  // LCD Blanking
)

// Bitfields for EXINT: External Interrupts
const (
	// EICRA: External Interrupt Control Register A
	EICRA_ISC01     = 0x2 // External Interrupt Sense Control 0 Bit 1
	EICRA_ISC01_Msk = 0x2 // External Interrupt Sense Control 0 Bit 1
	EICRA_ISC00     = 0x1 // External Interrupt Sense Control 0 Bit 0
	EICRA_ISC00_Msk = 0x1 // External Interrupt Sense Control 0 Bit 0

	// EIMSK: External Interrupt Mask Register
	EIMSK_PCIE0    = 0x10 // Pin Change Interrupt Enables
	EIMSK_PCIE1    = 0x20 // Pin Change Interrupt Enables
	EIMSK_PCIE2    = 0x40 // Pin Change Interrupt Enables
	EIMSK_PCIE3    = 0x80 // Pin Change Interrupt Enables
	EIMSK_PCIE_Msk = 0xf0 // Pin Change Interrupt Enables
	EIMSK_INT0     = 0x1  // External Interrupt Request 0 Enable
	EIMSK_INT0_Msk = 0x1  // External Interrupt Request 0 Enable

	// EIFR: External Interrupt Flag Register
	EIFR_PCIF0     = 0x10 // Pin Change Interrupt Flags
	EIFR_PCIF1     = 0x20 // Pin Change Interrupt Flags
	EIFR_PCIF2     = 0x40 // Pin Change Interrupt Flags
	EIFR_PCIF3     = 0x80 // Pin Change Interrupt Flags
	EIFR_PCIF_Msk  = 0xf0 // Pin Change Interrupt Flags
	EIFR_INTF0     = 0x1  // External Interrupt Flag 0
	EIFR_INTF0_Msk = 0x1  // External Interrupt Flag 0

	// PCMSK3: Pin Change Mask Register 3
	PCMSK3_PCINT0    = 0x1  // Pin Change Mask
	PCMSK3_PCINT1    = 0x2  // Pin Change Mask
	PCMSK3_PCINT2    = 0x4  // Pin Change Mask
	PCMSK3_PCINT3    = 0x8  // Pin Change Mask
	PCMSK3_PCINT4    = 0x10 // Pin Change Mask
	PCMSK3_PCINT5    = 0x20 // Pin Change Mask
	PCMSK3_PCINT6    = 0x40 // Pin Change Mask
	PCMSK3_PCINT_Msk = 0x7f // Pin Change Mask

	// PCMSK2: Pin Change Mask Register 2
	PCMSK2_PCINT0    = 0x1  // Pin Change Mask
	PCMSK2_PCINT1    = 0x2  // Pin Change Mask
	PCMSK2_PCINT2    = 0x4  // Pin Change Mask
	PCMSK2_PCINT3    = 0x8  // Pin Change Mask
	PCMSK2_PCINT4    = 0x10 // Pin Change Mask
	PCMSK2_PCINT5    = 0x20 // Pin Change Mask
	PCMSK2_PCINT6    = 0x40 // Pin Change Mask
	PCMSK2_PCINT7    = 0x80 // Pin Change Mask
	PCMSK2_PCINT_Msk = 0xff // Pin Change Mask

	// PCMSK1: Pin Change Mask Register 1
	PCMSK1_PCINT0    = 0x1  // Pin Change Mask
	PCMSK1_PCINT1    = 0x2  // Pin Change Mask
	PCMSK1_PCINT2    = 0x4  // Pin Change Mask
	PCMSK1_PCINT3    = 0x8  // Pin Change Mask
	PCMSK1_PCINT4    = 0x10 // Pin Change Mask
	PCMSK1_PCINT5    = 0x20 // Pin Change Mask
	PCMSK1_PCINT6    = 0x40 // Pin Change Mask
	PCMSK1_PCINT7    = 0x80 // Pin Change Mask
	PCMSK1_PCINT_Msk = 0xff // Pin Change Mask

	// PCMSK0: Pin Change Mask Register 0
	PCMSK0_PCINT0    = 0x1  // Pin Change Mask
	PCMSK0_PCINT1    = 0x2  // Pin Change Mask
	PCMSK0_PCINT2    = 0x4  // Pin Change Mask
	PCMSK0_PCINT3    = 0x8  // Pin Change Mask
	PCMSK0_PCINT4    = 0x10 // Pin Change Mask
	PCMSK0_PCINT5    = 0x20 // Pin Change Mask
	PCMSK0_PCINT6    = 0x40 // Pin Change Mask
	PCMSK0_PCINT7    = 0x80 // Pin Change Mask
	PCMSK0_PCINT_Msk = 0xff // Pin Change Mask
)

// Bitfields for CPU: CPU Registers
const (
	// SREG: Status Register
	SREG_I     = 0x80 // Global Interrupt Enable
	SREG_I_Msk = 0x80 // Global Interrupt Enable
	SREG_T     = 0x40 // Bit Copy Storage
	SREG_T_Msk = 0x40 // Bit Copy Storage
	SREG_H     = 0x20 // Half Carry Flag
	SREG_H_Msk = 0x20 // Half Carry Flag
	SREG_S     = 0x10 // Sign Bit
	SREG_S_Msk = 0x10 // Sign Bit
	SREG_V     = 0x8  // Two's Complement Overflow Flag
	SREG_V_Msk = 0x8  // Two's Complement Overflow Flag
	SREG_N     = 0x4  // Negative Flag
	SREG_N_Msk = 0x4  // Negative Flag
	SREG_Z     = 0x2  // Zero Flag
	SREG_Z_Msk = 0x2  // Zero Flag
	SREG_C     = 0x1  // Carry Flag
	SREG_C_Msk = 0x1  // Carry Flag

	// OSCCAL: Oscillator Calibration Value
	OSCCAL_OSCCAL0    = 0x1  // Oscillator Calibration
	OSCCAL_OSCCAL1    = 0x2  // Oscillator Calibration
	OSCCAL_OSCCAL2    = 0x4  // Oscillator Calibration
	OSCCAL_OSCCAL3    = 0x8  // Oscillator Calibration
	OSCCAL_OSCCAL4    = 0x10 // Oscillator Calibration
	OSCCAL_OSCCAL5    = 0x20 // Oscillator Calibration
	OSCCAL_OSCCAL6    = 0x40 // Oscillator Calibration
	OSCCAL_OSCCAL7    = 0x80 // Oscillator Calibration
	OSCCAL_OSCCAL_Msk = 0xff // Oscillator Calibration

	// CLKPR: Clock Prescale Register
	CLKPR_CLKPCE     = 0x80 // Clock Prescaler Change Enable
	CLKPR_CLKPCE_Msk = 0x80 // Clock Prescaler Change Enable
	CLKPR_CLKPS0     = 0x1  // Clock Prescaler Select Bits
	CLKPR_CLKPS1     = 0x2  // Clock Prescaler Select Bits
	CLKPR_CLKPS2     = 0x4  // Clock Prescaler Select Bits
	CLKPR_CLKPS3     = 0x8  // Clock Prescaler Select Bits
	CLKPR_CLKPS_Msk  = 0xf  // Clock Prescaler Select Bits

	// PRR: Power Reduction Register
	PRR_PRLCD        = 0x10 // Power Reduction LCD
	PRR_PRLCD_Msk    = 0x10 // Power Reduction LCD
	PRR_PRTIM1       = 0x8  // Power Reduction Timer/Counter1
	PRR_PRTIM1_Msk   = 0x8  // Power Reduction Timer/Counter1
	PRR_PRSPI        = 0x4  // Power Reduction Serial Peripheral Interface
	PRR_PRSPI_Msk    = 0x4  // Power Reduction Serial Peripheral Interface
	PRR_PRUSART0     = 0x2  // Power Reduction USART
	PRR_PRUSART0_Msk = 0x2  // Power Reduction USART
	PRR_PRADC        = 0x1  // Power Reduction ADC
	PRR_PRADC_Msk    = 0x1  // Power Reduction ADC

	// SMCR: Sleep Mode Control Register
	SMCR_SM0    = 0x2 // Sleep Mode Select bits
	SMCR_SM1    = 0x4 // Sleep Mode Select bits
	SMCR_SM2    = 0x8 // Sleep Mode Select bits
	SMCR_SM_Msk = 0xe // Sleep Mode Select bits
	SMCR_SE     = 0x1 // Sleep Enable
	SMCR_SE_Msk = 0x1 // Sleep Enable
)

// Bitfields for USI: Universal Serial Interface
const (
	// USISR: USI Status Register
	USISR_USISIF     = 0x80 // Start Condition Interrupt Flag
	USISR_USISIF_Msk = 0x80 // Start Condition Interrupt Flag
	USISR_USIOIF     = 0x40 // Counter Overflow Interrupt Flag
	USISR_USIOIF_Msk = 0x40 // Counter Overflow Interrupt Flag
	USISR_USIPF      = 0x20 // Stop Condition Flag
	USISR_USIPF_Msk  = 0x20 // Stop Condition Flag
	USISR_USIDC      = 0x10 // Data Output Collision
	USISR_USIDC_Msk  = 0x10 // Data Output Collision
	USISR_USICNT0    = 0x1  // USI Counter Value Bits
	USISR_USICNT1    = 0x2  // USI Counter Value Bits
	USISR_USICNT2    = 0x4  // USI Counter Value Bits
	USISR_USICNT3    = 0x8  // USI Counter Value Bits
	USISR_USICNT_Msk = 0xf  // USI Counter Value Bits

	// USICR: USI Control Register
	USICR_USISIE     = 0x80 // Start Condition Interrupt Enable
	USICR_USISIE_Msk = 0x80 // Start Condition Interrupt Enable
	USICR_USIOIE     = 0x40 // Counter Overflow Interrupt Enable
	USICR_USIOIE_Msk = 0x40 // Counter Overflow Interrupt Enable
	USICR_USIWM0     = 0x10 // USI Wire Mode Bits
	USICR_USIWM1     = 0x20 // USI Wire Mode Bits
	USICR_USIWM_Msk  = 0x30 // USI Wire Mode Bits
	USICR_USICS0     = 0x4  // USI Clock Source Select Bits
	USICR_USICS1     = 0x8  // USI Clock Source Select Bits
	USICR_USICS_Msk  = 0xc  // USI Clock Source Select Bits
	USICR_USICLK     = 0x2  // Clock Strobe
	USICR_USICLK_Msk = 0x2  // Clock Strobe
	USICR_USITC      = 0x1  // Toggle Clock Port Pin
	USICR_USITC_Msk  = 0x1  // Toggle Clock Port Pin
)

// Bitfields for ADC: Analog-to-Digital Converter
const (
	// ADMUX: The ADC multiplexer Selection Register
	ADMUX_REFS0     = 0x40 // Reference Selection Bits
	ADMUX_REFS1     = 0x80 // Reference Selection Bits
	ADMUX_REFS_Msk  = 0xc0 // Reference Selection Bits
	ADMUX_ADLAR     = 0x20 // Left Adjust Result
	ADMUX_ADLAR_Msk = 0x20 // Left Adjust Result
	ADMUX_MUX0      = 0x1  // Analog Channel and Gain Selection Bits
	ADMUX_MUX1      = 0x2  // Analog Channel and Gain Selection Bits
	ADMUX_MUX2      = 0x4  // Analog Channel and Gain Selection Bits
	ADMUX_MUX3      = 0x8  // Analog Channel and Gain Selection Bits
	ADMUX_MUX4      = 0x10 // Analog Channel and Gain Selection Bits
	ADMUX_MUX_Msk   = 0x1f // Analog Channel and Gain Selection Bits

	// ADCSRA: The ADC Control and Status register
	ADCSRA_ADEN      = 0x80 // ADC Enable
	ADCSRA_ADEN_Msk  = 0x80 // ADC Enable
	ADCSRA_ADSC      = 0x40 // ADC Start Conversion
	ADCSRA_ADSC_Msk  = 0x40 // ADC Start Conversion
	ADCSRA_ADATE     = 0x20 // ADC Auto Trigger Enable
	ADCSRA_ADATE_Msk = 0x20 // ADC Auto Trigger Enable
	ADCSRA_ADIF      = 0x10 // ADC Interrupt Flag
	ADCSRA_ADIF_Msk  = 0x10 // ADC Interrupt Flag
	ADCSRA_ADIE      = 0x8  // ADC Interrupt Enable
	ADCSRA_ADIE_Msk  = 0x8  // ADC Interrupt Enable
	ADCSRA_ADPS0     = 0x1  // ADC  Prescaler Select Bits
	ADCSRA_ADPS1     = 0x2  // ADC  Prescaler Select Bits
	ADCSRA_ADPS2     = 0x4  // ADC  Prescaler Select Bits
	ADCSRA_ADPS_Msk  = 0x7  // ADC  Prescaler Select Bits

	// DIDR0: Digital Input Disable Register 0
	DIDR0_ADC7D     = 0x80 // ADC7 Digital input Disable
	DIDR0_ADC7D_Msk = 0x80 // ADC7 Digital input Disable
	DIDR0_ADC6D     = 0x40 // ADC6 Digital input Disable
	DIDR0_ADC6D_Msk = 0x40 // ADC6 Digital input Disable
	DIDR0_ADC5D     = 0x20 // ADC5 Digital input Disable
	DIDR0_ADC5D_Msk = 0x20 // ADC5 Digital input Disable
	DIDR0_ADC4D     = 0x10 // ADC4 Digital input Disable
	DIDR0_ADC4D_Msk = 0x10 // ADC4 Digital input Disable
	DIDR0_ADC3D     = 0x8  // ADC3 Digital input Disable
	DIDR0_ADC3D_Msk = 0x8  // ADC3 Digital input Disable
	DIDR0_ADC2D     = 0x4  // ADC2 Digital input Disable
	DIDR0_ADC2D_Msk = 0x4  // ADC2 Digital input Disable
	DIDR0_ADC1D     = 0x2  // ADC1 Digital input Disable
	DIDR0_ADC1D_Msk = 0x2  // ADC1 Digital input Disable
	DIDR0_ADC0D     = 0x1  // ADC0 Digital input Disable
	DIDR0_ADC0D_Msk = 0x1  // ADC0 Digital input Disable
)

// Bitfields for BOOT_LOAD: Bootloader
const (
	// SPMCSR: Store Program Memory Control Register
	SPMCSR_SPMIE      = 0x80 // SPM Interrupt Enable
	SPMCSR_SPMIE_Msk  = 0x80 // SPM Interrupt Enable
	SPMCSR_RWWSB      = 0x40 // Read While Write Section Busy
	SPMCSR_RWWSB_Msk  = 0x40 // Read While Write Section Busy
	SPMCSR_RWWSRE     = 0x10 // Read While Write section read enable
	SPMCSR_RWWSRE_Msk = 0x10 // Read While Write section read enable
	SPMCSR_BLBSET     = 0x8  // Boot Lock Bit Set
	SPMCSR_BLBSET_Msk = 0x8  // Boot Lock Bit Set
	SPMCSR_PGWRT      = 0x4  // Page Write
	SPMCSR_PGWRT_Msk  = 0x4  // Page Write
	SPMCSR_PGERS      = 0x2  // Page Erase
	SPMCSR_PGERS_Msk  = 0x2  // Page Erase
	SPMCSR_SPMEN      = 0x1  // Store Program Memory Enable
	SPMCSR_SPMEN_Msk  = 0x1  // Store Program Memory Enable
)

// Bitfields for USART0: USART
const (
	// UCSR0A: USART Control and Status Register A
	UCSR0A_RXC0      = 0x80 // USART Receive Complete
	UCSR0A_RXC0_Msk  = 0x80 // USART Receive Complete
	UCSR0A_TXC0      = 0x40 // USART Transmit Complete
	UCSR0A_TXC0_Msk  = 0x40 // USART Transmit Complete
	UCSR0A_UDRE0     = 0x20 // USART Data Register Empty
	UCSR0A_UDRE0_Msk = 0x20 // USART Data Register Empty
	UCSR0A_FE0       = 0x10 // Framing Error
	UCSR0A_FE0_Msk   = 0x10 // Framing Error
	UCSR0A_DOR0      = 0x8  // Data OverRun
	UCSR0A_DOR0_Msk  = 0x8  // Data OverRun
	UCSR0A_UPE0      = 0x4  // USART Parity Error
	UCSR0A_UPE0_Msk  = 0x4  // USART Parity Error
	UCSR0A_U2X0      = 0x2  // Double the USART Transmission Speed
	UCSR0A_U2X0_Msk  = 0x2  // Double the USART Transmission Speed
	UCSR0A_MPCM0     = 0x1  // Multi-processor Communication Mode
	UCSR0A_MPCM0_Msk = 0x1  // Multi-processor Communication Mode

	// UCSR0B: USART Control and Status Register B
	UCSR0B_RXCIE0     = 0x80 // RX Complete Interrupt Enable
	UCSR0B_RXCIE0_Msk = 0x80 // RX Complete Interrupt Enable
	UCSR0B_TXCIE0     = 0x40 // TX Complete Interrupt Enable
	UCSR0B_TXCIE0_Msk = 0x40 // TX Complete Interrupt Enable
	UCSR0B_UDRIE0     = 0x20 // USART Data Register Empty Interrupt Enable
	UCSR0B_UDRIE0_Msk = 0x20 // USART Data Register Empty Interrupt Enable
	UCSR0B_RXEN0      = 0x10 // Receiver Enable
	UCSR0B_RXEN0_Msk  = 0x10 // Receiver Enable
	UCSR0B_TXEN0      = 0x8  // Transmitter Enable
	UCSR0B_TXEN0_Msk  = 0x8  // Transmitter Enable
	UCSR0B_UCSZ02     = 0x4  // Character Size
	UCSR0B_UCSZ02_Msk = 0x4  // Character Size
	UCSR0B_RXB80      = 0x2  // Receive Data Bit 8
	UCSR0B_RXB80_Msk  = 0x2  // Receive Data Bit 8
	UCSR0B_TXB80      = 0x1  // Transmit Data Bit 8
	UCSR0B_TXB80_Msk  = 0x1  // Transmit Data Bit 8

	// UCSR0C: USART Control and Status Register C
	UCSR0C_UMSEL0     = 0x40 // USART Mode Select
	UCSR0C_UMSEL0_Msk = 0x40 // USART Mode Select
	UCSR0C_UPM00      = 0x10 // Parity Mode Bits
	UCSR0C_UPM01      = 0x20 // Parity Mode Bits
	UCSR0C_UPM0_Msk   = 0x30 // Parity Mode Bits
	UCSR0C_USBS0      = 0x8  // Stop Bit Select
	UCSR0C_USBS0_Msk  = 0x8  // Stop Bit Select
	UCSR0C_UCSZ00     = 0x2  // Character Size
	UCSR0C_UCSZ01     = 0x4  // Character Size
	UCSR0C_UCSZ0_Msk  = 0x6  // Character Size
	UCSR0C_UCPOL0     = 0x1  // Clock Polarity
	UCSR0C_UCPOL0_Msk = 0x1  // Clock Polarity
)
