Datasheet
ATmega32A
2018 Microchip Technology Inc. Data Sheet Complete DS40002072A-page 324
30. Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
$3F ($5F) SREG I T H S V N Z C 16
$3E ($5E) SPH – – – – SP11 SP10 SP9 SP8 19
$3D ($5D) SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 19
$3C ($5C) OCR0
Timer/Counter0 Output Compare Register
88
$3B ($5B) GICR INT1 INT0 INT2 – – – IVSEL IVCE 54, 74
$3A ($5A) GIFR INTF1 INTF0 INTF2 – – – – – 75
$39 ($59) TIMSK OCIE2 TOIE2 TICIE1 OCIE1A OCIE1B TOIE1 OCIE0 TOIE0 88, 117, 134
$38 ($58) TIFR OCF2 TOV2 ICF1 OCF1A OCF1B TOV1 OCF0 TOV0 89, 118, 135
$37 ($57) SPMCR SPMIE RWWSB – RWWSRE BLBSET PGWRT PGERS SPMEN 254
$36 ($56) TWCR TWINT TWEA TWSTA TWSTO TWWC TWEN –TWIE 195
$35 ($55) MCUCR SE SM2 SM1 SM0 ISC11 ISC10 ISC01 ISC00 43, 73
$34 ($54) MCUCSR JTD ISC2 – JTRF WDRF BORF EXTRF PORF 49, 74, 242
$33 ($53) TCCR0 FOC0 WGM00 COM01 COM00 WGM01 CS02 CS01 CS00 86
$32 ($52) TCNT0 Timer/Counter0 (8 Bits) 88
$31
(1)
($51)
(1)
OSCCAL Oscillator Calibration Register 38
OCDR On-Chip Debug Register 42, 223
$30 ($50) SFIOR ADTS2 ADTS1 ADTS0 – ACME PUD PSR2 PSR10 70, 92, 135, 199, 217
$2F ($4F) TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 FOC1A FOC1B WGM11 WGM10 112
$2E ($4E) TCCR1B ICNC1 ICES1 – WGM13 WGM12 CS12 CS11 CS10 115
$2D ($4D) TCNT1H Timer/Counter1 – Counter Register High Byte 116
$2C ($4C) TCNT1L Timer/Counter1 – Counter Register Low Byte 116
$2B ($4B) OCR1AH
Timer/Counter1 – Output Compare Register A High Byte
116
$2A ($4A) OCR1AL
Timer/Counter1 – Output Compare Register A Low Byte
116
$29 ($49) OCR1BH
Timer/Counter1 – Output Compare Register B High Byte
117
$28 ($48) OCR1BL
Timer/Counter1 – Output Compare Register B Low Byte
117
$27 ($47) ICR1H Timer/Counter1 – Input Capture Register High Byte 117
$26 ($46) ICR1L Timer/Counter1 – Input Capture Register Low Byte 117
$25 ($45) TCCR2 FOC2 WGM20 COM21 COM20 WGM21 CS22 CS21 CS20 131
$24 ($44) TCNT2 Timer/Counter2 (8 Bits) 133
$23 ($43) OCR2
Timer/Counter2 Output Compare Register
133
$22 ($42) ASSR – – – – AS2 TCN2UB OCR2UB TCR2UB 134
$21 ($41) WDTCR – – – WDTOE WDE WDP2 WDP1 WDP0 49
$20
(2)
($40)
(2)
UBRRH URSEL – – –UBRR[11:8] 167
UCSRC URSEL UMSEL UPM1 UPM0 USBS UCSZ1 UCSZ0 UCPOL 165
$1F ($3F) EEARH – – – – – – EEAR9 EEAR8 27
$1E ($3E) EEARL EEPROM Address Register Low Byte 27
$1D ($3D) EEDR EEPROM Data Register 27
$1C ($3C) EECR – – – – EERIE EEMWE EEWE EERE 27
$1B ($3B) PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 70
$1A ($3A) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 70
$19 ($39) PINA PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 70
$18 ($38) PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 71
$17 ($37) DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 71
$16 ($36) PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 71
$15 ($35) PORTC PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 71
$14 ($34) DDRC DDC7 DDC6 DDC5 DDC4 DDC3 DDC2 DDC1 DDC0 71
$13 ($33) PINC PINC7 PINC6 PINC5 PINC4 PINC3 PINC2 PINC1 PINC0 71
$12 ($32) PORTD PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0 71
$11 ($31) DDRD DDD7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0 71
$10 ($30) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0 72
$0F ($2F) SPDR SPI Data Register 142
$0E ($2E) SPSR SPIF WCOL – – – – –SPI2X 141
$0D ($2D) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 140
$0C ($2C) UDR USART I/O Data Register 163
$0B ($2B) UCSRA RXC TXC UDRE FE DOR PE U2X MPCM 163
$0A ($2A) UCSRB RXCIE TXCIE UDRIE RXEN TXEN UCSZ2 RXB8 TXB8 164
$09 ($29) UBRRL USART Baud Rate Register Low Byte 167
$08 ($28) ACSR ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 199
$07 ($27) ADMUX REFS1 REFS0 ADLAR MUX4 MUX3 MUX2 MUX1 MUX0 214
$06 ($26) ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 215
$05 ($25) ADCH ADC Data Register High Byte 216
$04 ($24) ADCL ADC Data Register Low Byte 216
$03 ($23) TWDR Two-wire Serial Interface Data Register 197
$02 ($22) TWAR TWA6 TWA5 TWA4 TWA3 TWA2 TWA1 TWA0 TWGCE 197
$01 ($21) TWSR TWS7
TWS6 TWS5 TWS4 TWS3
–
TWPS1 TWPS0
196
$00 ($20) TWBR Two-wire Serial Interface Bit Rate Register 195