\ Partname: ATmega16U2 \ generated automatically \ PORTB &37 constant PORTB \ Port B Data Register &36 constant DDRB \ Port B Data Direction Register &35 constant PINB \ Port B Input Pins \ PORTD &43 constant PORTD \ Port D Data Register &42 constant DDRD \ Port D Data Direction Register &41 constant PIND \ Port D Input Pins \ SPI &76 constant SPCR \ SPI Control Register $80 constant SPCR_SPIE \ SPI Interrupt Enable $40 constant SPCR_SPE \ SPI Enable $20 constant SPCR_DORD \ Data Order $10 constant SPCR_MSTR \ Master/Slave Select $08 constant SPCR_CPOL \ Clock polarity $04 constant SPCR_CPHA \ Clock Phase $03 constant SPCR_SPR \ SPI Clock Rate Selects &77 constant SPSR \ SPI Status Register $80 constant SPSR_SPIF \ SPI Interrupt Flag $40 constant SPSR_WCOL \ Write Collision Flag $01 constant SPSR_SPI2X \ Double SPI Speed Bit &78 constant SPDR \ SPI Data Register \ BOOT_LOAD &87 constant SPMCSR \ Store Program Memory Control Register $80 constant SPMCSR_SPMIE \ SPM Interrupt Enable $40 constant SPMCSR_RWWSB \ Read While Write Section Busy $20 constant SPMCSR_SIGRD \ Signature Row Read $10 constant SPMCSR_RWWSRE \ Read While Write section read enable $08 constant SPMCSR_BLBSET \ Boot Lock Bit Set $04 constant SPMCSR_PGWRT \ Page Write $02 constant SPMCSR_PGERS \ Page Erase $01 constant SPMCSR_SPMEN \ Store Program Memory Enable \ EEPROM &65 constant EEAR \ EEPROM Address Register Low Bytes &64 constant EEDR \ EEPROM Data Register &63 constant EECR \ EEPROM Control Register $30 constant EECR_EEPM \ EEPROM Programming Mode Bits $08 constant EECR_EERIE \ EEPROM Ready Interrupt Enable $04 constant EECR_EEMPE \ EEPROM Master Write Enable $02 constant EECR_EEPE \ EEPROM Write Enable $01 constant EECR_EERE \ EEPROM Read Enable \ TIMER_COUNTER_0 &72 constant OCR0B \ Timer/Counter0 Output Compare Register &71 constant OCR0A \ Timer/Counter0 Output Compare Register &70 constant TCNT0 \ Timer/Counter0 &69 constant TCCR0B \ Timer/Counter Control Register B $80 constant TCCR0B_FOC0A \ Force Output Compare A $40 constant TCCR0B_FOC0B \ Force Output Compare B $08 constant TCCR0B_WGM02 \ $07 constant TCCR0B_CS0 \ Clock Select &68 constant TCCR0A \ Timer/Counter Control Register A $C0 constant TCCR0A_COM0A \ Compare Output Mode, Phase Correct PWM Mode $30 constant TCCR0A_COM0B \ Compare Output Mode, Fast PWm $03 constant TCCR0A_WGM0 \ Waveform Generation Mode &110 constant TIMSK0 \ Timer/Counter0 Interrupt Mask Register $04 constant TIMSK0_OCIE0B \ Timer/Counter0 Output Compare Match B Interrupt Enable $02 constant TIMSK0_OCIE0A \ Timer/Counter0 Output Compare Match A Interrupt Enable $01 constant TIMSK0_TOIE0 \ Timer/Counter0 Overflow Interrupt Enable &53 constant TIFR0 \ Timer/Counter0 Interrupt Flag register $04 constant TIFR0_OCF0B \ Timer/Counter0 Output Compare Flag 0B $02 constant TIFR0_OCF0A \ Timer/Counter0 Output Compare Flag 0A $01 constant TIFR0_TOV0 \ Timer/Counter0 Overflow Flag &67 constant GTCCR \ General Timer/Counter Control Register $80 constant GTCCR_TSM \ Timer/Counter Synchronization Mode $01 constant GTCCR_PSRSYNC \ Prescaler Reset Timer/Counter1 and Timer/Counter0 \ TIMER_COUNTER_1 &128 constant TCCR1A \ Timer/Counter1 Control Register A $C0 constant TCCR1A_COM1A \ Compare Output Mode 1A, bits $30 constant TCCR1A_COM1B \ Compare Output Mode 1B, bits $0C constant TCCR1A_COM1C \ Compare Output Mode 1C, bits $03 constant TCCR1A_WGM1 \ Waveform Generation Mode &129 constant TCCR1B \ Timer/Counter1 Control Register B $80 constant TCCR1B_ICNC1 \ Input Capture 1 Noise Canceler $40 constant TCCR1B_ICES1 \ Input Capture 1 Edge Select $18 constant TCCR1B_WGM1 \ Waveform Generation Mode $07 constant TCCR1B_CS1 \ Prescaler source of Timer/Counter 1 &130 constant TCCR1C \ Timer/Counter 1 Control Register C $80 constant TCCR1C_FOC1A \ Force Output Compare 1A $40 constant TCCR1C_FOC1B \ Force Output Compare 1B $20 constant TCCR1C_FOC1C \ Force Output Compare 1C &132 constant TCNT1 \ Timer/Counter1 Bytes &136 constant OCR1A \ Timer/Counter1 Output Compare Register A Bytes &138 constant OCR1B \ Timer/Counter1 Output Compare Register B Bytes &140 constant OCR1C \ Timer/Counter1 Output Compare Register C Bytes &134 constant ICR1 \ Timer/Counter1 Input Capture Register Bytes &111 constant TIMSK1 \ Timer/Counter1 Interrupt Mask Register $20 constant TIMSK1_ICIE1 \ Timer/Counter1 Input Capture Interrupt Enable $08 constant TIMSK1_OCIE1C \ Timer/Counter1 Output Compare C Match Interrupt Enable $04 constant TIMSK1_OCIE1B \ Timer/Counter1 Output Compare B Match Interrupt Enable $02 constant TIMSK1_OCIE1A \ Timer/Counter1 Output Compare A Match Interrupt Enable $01 constant TIMSK1_TOIE1 \ Timer/Counter1 Overflow Interrupt Enable &54 constant TIFR1 \ Timer/Counter1 Interrupt Flag register $20 constant TIFR1_ICF1 \ Input Capture Flag 1 $08 constant TIFR1_OCF1C \ Output Compare Flag 1C $04 constant TIFR1_OCF1B \ Output Compare Flag 1B $02 constant TIFR1_OCF1A \ Output Compare Flag 1A $01 constant TIFR1_TOV1 \ Timer/Counter1 Overflow Flag \ PLL &73 constant PLLCSR \ PLL Status and Control register $1C constant PLLCSR_PLLP \ PLL prescaler Bits $02 constant PLLCSR_PLLE \ PLL Enable Bit $01 constant PLLCSR_PLOCK \ PLL Lock Status Bit \ USB_DEVICE &244 constant UEINT \ &242 constant UEBCLX \ &241 constant UEDATX \ &240 constant UEIENX \ $80 constant UEIENX_FLERRE \ $40 constant UEIENX_NAKINE \ $10 constant UEIENX_NAKOUTE \ $08 constant UEIENX_RXSTPE \ $04 constant UEIENX_RXOUTE \ $02 constant UEIENX_STALLEDE \ $01 constant UEIENX_TXINE \ &239 constant UESTA1X \ $04 constant UESTA1X_CTRLDIR \ $03 constant UESTA1X_CURRBK \ &238 constant UESTA0X \ $80 constant UESTA0X_CFGOK \ $40 constant UESTA0X_OVERFI \ $20 constant UESTA0X_UNDERFI \ $0C constant UESTA0X_DTSEQ \ $03 constant UESTA0X_NBUSYBK \ &237 constant UECFG1X \ $70 constant UECFG1X_EPSIZE \ $0C constant UECFG1X_EPBK \ $02 constant UECFG1X_ALLOC \ &236 constant UECFG0X \ $C0 constant UECFG0X_EPTYPE \ $01 constant UECFG0X_EPDIR \ &235 constant UECONX \ $20 constant UECONX_STALLRQ \ $10 constant UECONX_STALLRQC \ $08 constant UECONX_RSTDT \ $01 constant UECONX_EPEN \ &234 constant UERST \ $1F constant UERST_EPRST \ &233 constant UENUM \ &232 constant UEINTX \ $80 constant UEINTX_FIFOCON \ $40 constant UEINTX_NAKINI \ $20 constant UEINTX_RWAL \ $10 constant UEINTX_NAKOUTI \ $08 constant UEINTX_RXSTPI \ $04 constant UEINTX_RXOUTI \ $02 constant UEINTX_STALLEDI \ $01 constant UEINTX_TXINI \ &230 constant UDMFN \ $10 constant UDMFN_FNCERR \ &228 constant UDFNUM \ &227 constant UDADDR \ $80 constant UDADDR_ADDEN \ $7F constant UDADDR_UADD \ &226 constant UDIEN \ $40 constant UDIEN_UPRSME \ $20 constant UDIEN_EORSME \ $10 constant UDIEN_WAKEUPE \ $08 constant UDIEN_EORSTE \ $04 constant UDIEN_SOFE \ $01 constant UDIEN_SUSPE \ &225 constant UDINT \ $40 constant UDINT_UPRSMI \ $20 constant UDINT_EORSMI \ $10 constant UDINT_WAKEUPI \ $08 constant UDINT_EORSTI \ $04 constant UDINT_SOFI \ $01 constant UDINT_SUSPI \ &224 constant UDCON \ $04 constant UDCON_RSTCPU \ $02 constant UDCON_RMWKUP \ $01 constant UDCON_DETACH \ &216 constant USBCON \ USB General Control Register $80 constant USBCON_USBE \ $20 constant USBCON_FRZCLK \ &99 constant REGCR \ Regulator Control Register $01 constant REGCR_REGDIS \ \ PS2 &251 constant UPOE \ $C0 constant UPOE_UPWE \ $30 constant UPOE_UPDRV \ $08 constant UPOE_SCKI \ $04 constant UPOE_DATAI \ $02 constant UPOE_DPI \ $01 constant UPOE_DMI \ &250 constant PS2CON \ PS2 Pad Enable register $01 constant PS2CON_PS2EN \ Enable \ CPU &95 constant SREG \ Status Register $80 constant SREG_I \ Global Interrupt Enable $40 constant SREG_T \ Bit Copy Storage $20 constant SREG_H \ Half Carry Flag $10 constant SREG_S \ Sign Bit $08 constant SREG_V \ Two's Complement Overflow Flag $04 constant SREG_N \ Negative Flag $02 constant SREG_Z \ Zero Flag $01 constant SREG_C \ Carry Flag &93 constant SP \ Stack Pointer &85 constant MCUCR \ MCU Control Register $10 constant MCUCR_PUD \ Pull-up disable $02 constant MCUCR_IVSEL \ Interrupt Vector Select $01 constant MCUCR_IVCE \ Interrupt Vector Change Enable &84 constant MCUSR \ MCU Status Register $20 constant MCUSR_USBRF \ USB reset flag $08 constant MCUSR_WDRF \ Watchdog Reset Flag $04 constant MCUSR_BORF \ Brown-out Reset Flag $02 constant MCUSR_EXTRF \ External Reset Flag $01 constant MCUSR_PORF \ Power-on reset flag &102 constant OSCCAL \ Oscillator Calibration Value &97 constant CLKPR \ $80 constant CLKPR_CLKPCE \ $0F constant CLKPR_CLKPS \ &83 constant SMCR \ Sleep Mode Control Register $0E constant SMCR_SM \ Sleep Mode Select bits $01 constant SMCR_SE \ Sleep Enable &92 constant EIND \ Extended Indirect Register &75 constant GPIOR2 \ General Purpose IO Register 2 $FF constant GPIOR2_GPIOR \ General Purpose IO Register 2 bis &74 constant GPIOR1 \ General Purpose IO Register 1 $FF constant GPIOR1_GPIOR \ General Purpose IO Register 1 bis &62 constant GPIOR0 \ General Purpose IO Register 0 $80 constant GPIOR0_GPIOR07 \ General Purpose IO Register 0 bit 7 $40 constant GPIOR0_GPIOR06 \ General Purpose IO Register 0 bit 6 $20 constant GPIOR0_GPIOR05 \ General Purpose IO Register 0 bit 5 $10 constant GPIOR0_GPIOR04 \ General Purpose IO Register 0 bit 4 $08 constant GPIOR0_GPIOR03 \ General Purpose IO Register 0 bit 3 $04 constant GPIOR0_GPIOR02 \ General Purpose IO Register 0 bit 2 $02 constant GPIOR0_GPIOR01 \ General Purpose IO Register 0 bit 1 $01 constant GPIOR0_GPIOR00 \ General Purpose IO Register 0 bit 0 &101 constant PRR1 \ Power Reduction Register1 $80 constant PRR1_PRUSB \ Power Reduction USB $01 constant PRR1_PRUSART1 \ Power Reduction USART1 &100 constant PRR0 \ Power Reduction Register0 $20 constant PRR0_PRTIM0 \ Power Reduction Timer/Counter0 $08 constant PRR0_PRTIM1 \ Power Reduction Timer/Counter1 $04 constant PRR0_PRSPI \ Power Reduction Serial Peripheral Interface &210 constant CLKSTA \ $02 constant CLKSTA_RCON \ $01 constant CLKSTA_EXTON \ &209 constant CLKSEL1 \ $F0 constant CLKSEL1_RCCKSEL \ $0F constant CLKSEL1_EXCKSEL \ &208 constant CLKSEL0 \ $C0 constant CLKSEL0_RCSUT \ $30 constant CLKSEL0_EXSUT \ $08 constant CLKSEL0_RCE \ $04 constant CLKSEL0_EXTE \ $01 constant CLKSEL0_CLKS \ &81 constant DWDR \ debugWire communication register \ EXTERNAL_INTERRUPT &105 constant EICRA \ External Interrupt Control Register A $C0 constant EICRA_ISC3 \ External Interrupt Sense Control Bit $30 constant EICRA_ISC2 \ External Interrupt Sense Control Bit $0C constant EICRA_ISC1 \ External Interrupt Sense Control Bit $03 constant EICRA_ISC0 \ External Interrupt Sense Control Bit &106 constant EICRB \ External Interrupt Control Register B $C0 constant EICRB_ISC7 \ External Interrupt 7-4 Sense Control Bit $30 constant EICRB_ISC6 \ External Interrupt 7-4 Sense Control Bit $0C constant EICRB_ISC5 \ External Interrupt 7-4 Sense Control Bit $03 constant EICRB_ISC4 \ External Interrupt 7-4 Sense Control Bit &61 constant EIMSK \ External Interrupt Mask Register $FF constant EIMSK_INT \ External Interrupt Request 7 Enable &60 constant EIFR \ External Interrupt Flag Register $FF constant EIFR_INTF \ External Interrupt Flags &107 constant PCMSK0 \ Pin Change Mask Register 0 $FF constant PCMSK0_PCINT \ Pin Change Enable Masks &108 constant PCMSK1 \ Pin Change Mask Register 1 $1F constant PCMSK1_PCINT \ &59 constant PCIFR \ Pin Change Interrupt Flag Register $03 constant PCIFR_PCIF \ Pin Change Interrupt Flags &104 constant PCICR \ Pin Change Interrupt Control Register $03 constant PCICR_PCIE \ Pin Change Interrupt Enables \ USART1 &206 constant UDR1 \ USART I/O Data Register &200 constant UCSR1A \ USART Control and Status Register A $80 constant UCSR1A_RXC1 \ USART Receive Complete $40 constant UCSR1A_TXC1 \ USART Transmitt Complete $20 constant UCSR1A_UDRE1 \ USART Data Register Empty $10 constant UCSR1A_FE1 \ Framing Error $08 constant UCSR1A_DOR1 \ Data overRun $04 constant UCSR1A_UPE1 \ Parity Error $02 constant UCSR1A_U2X1 \ Double the USART transmission speed $01 constant UCSR1A_MPCM1 \ Multi-processor Communication Mode &201 constant UCSR1B \ USART Control and Status Register B $80 constant UCSR1B_RXCIE1 \ RX Complete Interrupt Enable $40 constant UCSR1B_TXCIE1 \ TX Complete Interrupt Enable $20 constant UCSR1B_UDRIE1 \ USART Data register Empty Interrupt Enable $10 constant UCSR1B_RXEN1 \ Receiver Enable $08 constant UCSR1B_TXEN1 \ Transmitter Enable $04 constant UCSR1B_UCSZ12 \ Character Size $02 constant UCSR1B_RXB81 \ Receive Data Bit 8 $01 constant UCSR1B_TXB81 \ Transmit Data Bit 8 &202 constant UCSR1C \ USART Control and Status Register C $C0 constant UCSR1C_UMSEL1 \ USART Mode Select $30 constant UCSR1C_UPM1 \ Parity Mode Bits $08 constant UCSR1C_USBS1 \ Stop Bit Select $06 constant UCSR1C_UCSZ1 \ Character Size $01 constant UCSR1C_UCPOL1 \ Clock Polarity &203 constant UCSR1D \ USART Control and Status Register D $02 constant UCSR1D_CTSEN \ CTS Enable $01 constant UCSR1D_RTSEN \ RTS Enable &204 constant UBRR1 \ USART Baud Rate Register Bytes \ WATCHDOG &96 constant WDTCSR \ Watchdog Timer Control Register $80 constant WDTCSR_WDIF \ Watchdog Timeout Interrupt Flag $40 constant WDTCSR_WDIE \ Watchdog Timeout Interrupt Enable $27 constant WDTCSR_WDP \ Watchdog Timer Prescaler Bits $10 constant WDTCSR_WDCE \ Watchdog Change Enable $08 constant WDTCSR_WDE \ Watch Dog Enable &98 constant WDTCKD \ Watchdog Timer Clock Divider $08 constant WDTCKD_WDEWIF \ Watchdog Early Warning Interrupt Flag $04 constant WDTCKD_WDEWIE \ Watchdog Early Warning Interrupt Enable $03 constant WDTCKD_WCLKD \ Watchdog Timer Clock Dividers \ ANALOG_COMPARATOR &80 constant ACSR \ Analog Comparator Control And Status Register $80 constant ACSR_ACD \ Analog Comparator Disable $40 constant ACSR_ACBG \ Analog Comparator Bandgap Select $20 constant ACSR_ACO \ Analog Compare Output $10 constant ACSR_ACI \ Analog Comparator Interrupt Flag $08 constant ACSR_ACIE \ Analog Comparator Interrupt Enable $04 constant ACSR_ACIC \ Analog Comparator Input Capture Enable $03 constant ACSR_ACIS \ Analog Comparator Interrupt Mode Select bits &127 constant DIDR1 \ $02 constant DIDR1_AIN1D \ AIN1 Digital Input Disable $01 constant DIDR1_AIN0D \ AIN0 Digital Input Disable \ PORTC &40 constant PORTC \ Port C Data Register $F0 constant PORTC_PORTC \ Port C Data Register bits $07 constant PORTC_PORTC \ Port C Data Register bits &39 constant DDRC \ Port C Data Direction Register $F0 constant DDRC_DDC \ Port C Data Direction Register bits $07 constant DDRC_DDC \ Port C Data Direction Register bits &38 constant PINC \ Port C Input Pins $F0 constant PINC_PINC \ Port C Input Pins bits $07 constant PINC_PINC \ Port C Input Pins bits \ Interrupts &2 constant INT0Addr \ External Interrupt Request 0 &4 constant INT1Addr \ External Interrupt Request 1 &6 constant INT2Addr \ External Interrupt Request 2 &8 constant INT3Addr \ External Interrupt Request 3 &10 constant INT4Addr \ External Interrupt Request 4 &12 constant INT5Addr \ External Interrupt Request 5 &14 constant INT6Addr \ External Interrupt Request 6 &16 constant INT7Addr \ External Interrupt Request 7 &18 constant PCINT0Addr \ Pin Change Interrupt Request 0 &20 constant PCINT1Addr \ Pin Change Interrupt Request 1 &22 constant USB_GENAddr \ USB General Interrupt Request &24 constant USB_COMAddr \ USB Endpoint/Pipe Interrupt Communication Reque &26 constant WDTAddr \ Watchdog Time-out Interrupt &28 constant TIMER1_CAPTAddr \ Timer/Counter2 Capture Event &30 constant TIMER1_COMPAAddr \ Timer/Counter2 Compare Match B &32 constant TIMER1_COMPBAddr \ Timer/Counter2 Compare Match B &34 constant TIMER1_COMPCAddr \ Timer/Counter2 Compare Match C &36 constant TIMER1_OVFAddr \ Timer/Counter1 Overflow &38 constant TIMER0_COMPAAddr \ Timer/Counter0 Compare Match A &40 constant TIMER0_COMPBAddr \ Timer/Counter0 Compare Match B &42 constant TIMER0_OVFAddr \ Timer/Counter0 Overflow &44 constant SPI__STCAddr \ SPI Serial Transfer Complete &46 constant USART1__RXAddr \ USART1, Rx Complete &48 constant USART1__UDREAddr \ USART1 Data register Empty &50 constant USART1__TXAddr \ USART1, Tx Complete &52 constant ANALOG_COMPAddr \ Analog Comparator &54 constant EE_READYAddr \ EEPROM Ready &56 constant SPM_READYAddr \ Store Program Memory Read