Datasheet

8
ATtiny20 [DATASHEET]
8235ES–AVR–03/2013
4. Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
0x3F SREG I T H S V N Z C Page 14
0x3E SPH Stack Pointer High Byte Page 13
0x3D SPL Stack Pointer Low Byte Page 13
0x3C CCP CPU Change Protection Byte Page 13
0x3B RSTFLR
– – – – WDRF BORF EXTRF PORF Page 35
0x3A MCUCR ICSC01 ICSC00
– BODS SM2 SM1 SM0 SE Pages 26, 38
0x39 OSCCAL Oscillator Calibration Byte Page 22
0x38 Reserved
– – – – – – – –
0x37 CLKMSR
– – – – – – CLKMS1 CLKMS0 Page 20
0x36 CLKPSR
– – – – CLKPS3 CLKPS2 CLKPS1 CLKPS0 Page 21
0x35 PRR
– – – PRTWI PRSPI PRTIM1 PRTIM0 PRADC Page 27
0x34 QTCSR QTouch Control and Status Register Page 7
0x33 NVMCMD
– – NVM Command Page 166
0x32 NVMCSR NVMBSY
– – – – – – – Page 166
0x31 WDTCSR WDIF WDIE WDP3
– WDE WDP2 WDP1 WDP0 Page 33
0x30 SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 Page 132
0x2F SPSR SPIF WCOL
– – – – SSPS SPI2X Page 133
0x2E SPDR SPI Data Register Page 134
0x2D TWSCRA TWSHE
– TWDIE TWASIE TWEN TWSIE TWPME TWSME Page 143
0x2C TWSCRB
– – – – – TWAA TWCMD[1.0] Page 144
0x2B TWSSRA TWDIF TWASIF TWCH TWRA TWC TWBE TWDIR TWAS Page 145
0x2A TWSA TWI Slave Address Register Page 146
0x29 TWSAM TWI Slave Address Mask Register Page 147
0x28 TWSD TWI Slave Data Register Page 146
0x27 GTCCR TSM
– – – – – – PSR Page 104
0x26 TIMSK ICE1
– OCIE1B OCIE1A TOIE1 OCIE0B OCIE0A TOIE0 Pages 74, 101
0x25 TIFR ICF1
– OCF1B OCF1A TOV1 OCF0B OCF0A TOV0 Pages 75, 102
0x24 TCCR1A COM1A1 COM1A0 COM1B1 COM1B0
– – WGM11 WGM10 Page 96
0x23 TCCR1B ICNC1 ICES1
– WGM13 WGM12 CS12 CS11 CS10 Page 98
0x22 TCCR1C FOC1A FOC1B
– – – – – – Page 100
0x21 TCNT1H Timer/Counter1 – Counter Register High Byte Page 100
0x20 TCNT1L Timer/Counter1 – Counter Register Low Byte Page 100
0x1F OCR1AH Timer/Counter1 – Compare Register A High Byte Page 100
0x1E OCR1AL Timer/Counter1 – Compare Register A Low Byte Page 100
0x1D OCR1BH Timer/Counter1 – Compare Register B High Byte Page 101
0x1C OCR1BL Timer/Counter1 – Compare Register B Low Byte Page 101
0x1B ICR1H Timer/Counter1 - Input Capture Register High Byte Page 101
0x1A ICR1L Timer/Counter1 - Input Capture Register Low Byte Page 101
0x19 TCCR0A COM0A1 COM0A0 COM0B1 COM0B0
– – WGM01 WGM00 Page 69
0x18 TCCR0B FOC0A FOC0B
– – WGM02 CS02 CS01 CS00 Page 72
0x17 TCNT0 Timer/Counter0 – Counter Register Page 73
0x16 OCR0A Timer/Counter0 – Compare Register A Page 74
0x15 OCR0B Timer/Counter0 – Compare Register B Page 74
0x14 ACSRA ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 Page 106
0x13 ACSRB HSEL HLEV ACLP
– ACCE ACME ACIRS1 ACIRS0 Page 107
0x12 ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 Page 122
0x11 ADCSRB VDEN VDPD
– – ADLAR ADTS2 ADTS1 ADTS0 Page 123
0x10 ADMUX
– REFS REFEN ADC0EN MUX3 MUX2 MUX1 MUX0 Page 120
0x0F ADCH ADC Conversion Result – High Byte Page 121
0x0E ADCL ADC Conversion Result – Low Byte Page 121
0x0D DIDR0 ADC7D ADC6D ADC5D ADC4D ADC3D ADC2D ADC1D ADC0D Page 124
0x0C GIMSK
– – PCIE1 PCIE0 – – – INT0 Page 39
0x0B GIFR
– – PCIF1 PCIF0 – – – INTF0 Page 40
0x0A PCMSK1
– – – – PCINT11 PCINT10 PCINT9 PCINT8 Page 40
0x09 PCMSK0
PCINT7 PCINT6 PCINT5 PCINT4 PCINT3 PCINT2 PCINT1 PCINT0 Page 41
0x08 PORTCR
– – – – – – BBMB BBMA Page 56
0x07 PUEB
– – – – PUEB3 PUEB2 PUEB1 PUEB0 Page 57
0x06 PORTB
– – – – PORTB3 PORTB2 PORTB1 PORTB0 Page 57
0x05 DDRB
– – – – DDRB3 DDRB2 DDRB1 DDRB0 Page 57
0x04 PINB
– – – – PINB3 PINB2 PINB1 PINB0 Page 58
0x03 PUEA PUEA7 PUEA6 PUEA5 PUEA4 PUEA3 PUEA2 PUEA1 PUEA0 Page 57
0x02 PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 Page 57
0x01 DDRA DDRA7 DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0 Page 57
0x00 PINA
PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 Page 57