Rainbow Electronics ATmega103L - Manual (Page 121)

ATmega603/103
121
Note: For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
should never be written. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI instruc-
tions will operate on all bits in the I/O register, writing a one back into any flag read as set, thus clearing the flag. The CBI and
SBI instructions work with registers $00 to $1F only.
Register Summary
Address Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Page
$3F ($5F) SREG I T H S V N Z C page 21
$3E ($5E) SPH SP15 SP14 SP13 SP12 SP11 SP10 SP9 SP8 page 21
$3D ($5D) SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 page 21
$3C ($5C) XDIV XDIVEN XDIV6 XDIV5 XDIV4 XDIV3 XDIV2 XDIV1 XDIV0 page 23
$3B ($5B) RAMPZ - - - - - - - RAMPZ0 page 22
$3A ($5A) EICR ISC71 ISC70 ISC61 ISC60 ISC51 ISC50 ISC41 ISC40 page 31
$39 ($59) EIMSK INT7 INT6 INT5 INT4 INT3 INT2 INT1 INT0 page 30
$38 ($58) EIFR INTF7 INTF6 INTF5 INTF4 - - - - page 30
$37 ($57) TIMSK OCIE2 TOIE2 TICIE1 OCIE1A OCIE1B TOIE1 OCIE0 TOIE0 page 31
$36 ($56) TIFR OCF2 TOV2 ICF1 OCF1A OCF1B TOV1 OCF0 TOV0 page 32
$35 ($55) MCUCR SRE SRW SE SM1 SM0 - - - page 22
$34 ($54) MCUSR - - - - - - EXTRF PORF page 29
$33 ($53) TCCR0 - PWM0 COM01 COM00 CTC0 CS02 CS01 CS00 page 38
$32 ($52) TCNT0 Timer/Counter0 (8 Bit) page 39
$31 ($51) OCR0 Timer/Counter0 Output Compare Register page 40
$30 ($50) ASSR - - - - AS0 TCN0UB OCR0UB TCR0UB page 41
$2F ($4F) TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 - - PWM11 PWM10 page 45
$2E ($4E) TCCR1B ICNC1 ICES1 - - CTC1 CS12 CS11 CS10 page 46
$2D ($4D) TCNT1H Timer/Counter1 - Counter Register High Byte page 47
$2C ($4C) TCNT1L Timer/Counter1 - Counter Register Low Byte page 47
$2B ($4B) OCR1AH Timer/Counter1 - Output Compare Register A High Byte page 48
$2A ($4A) OCR1AL Timer/Counter1 - Output Compare Register A Low Byte page 48
$29 ($49) OCR1BH Timer/Counter1 - Output Compare Register B High Byte page 48
$28 ($48) OCR1BL Timer/Counter1 - Output Compare Register B Low Byte page 48
$27 ($47) ICR1H Timer/Counter1 - Input Capture Register High Byte page 48
$26 ($46) ICR1L Timer/Counter1 - Input Capture Register Low Byte page 48
$25 ($45) TCCR2 - PWM2 COM21 COM20 CTC2 CS22 CS21 CS20 page 38
$24 ($44) TCNT2 Timer/Counter2 (8 Bit) page 39
$23 ($43) OCR2 Timer/Counter2 Output Compare Register page 40
$21 ($47) WDTCR - - - WDTOE WDE WDP2 WDP1 WDP0 page 51
$1F ($3F) EEARH - - - - EEAR11 EEAR10 EEAR9 EEAR8 page 52
$1E ($3E) EEARL EEPROM Address Register L page 52
$1D ($3D) EEDR EEPROM Data Register page 53
$1C ($3C) EECR - - - - EERIE EEMWE EEWE EERE page 53
$1B ($3B) PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 page 75
$1A ($3A) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 page 75
$19 ($39) PINA PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 page 75
$18 ($38) PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 page 77
$17 ($37) DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 page 77
$16 ($36) PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 page 77
$15 ($35) PORTC PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 page 82
$12 ($32) PORTD PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0 page 83
$11 ($31) DDRD DDD7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0 page 84
$10 ($30) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0 page 84
$0F ($2F) SPDR SPI Data Register page 58
$0E ($2E) SPSR SPIF WCOL - - - - - - page 58
$0D ($2D) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 page 57
$0C ($2C) UDR UART I/O Data Register page 62
$0B ($2B) USR RXC TXC UDRE FE OR - - - page 62
$0A ($2A) UCR RXCIE TXCIE UDRIE RXEN TXEN CHR9 RXB8 TXB8 page 63
$09 ($29) UBRR UART Baud Rate Register page 65
$08 ($28) ACSR ACD - ACO ACI ACIE ACIC ACIS1 ACIS0 page 65
$07 ($27) ADMUX - - - - - MUX2 MUX1 MUX0 page 69
$06 ($26) ADCSR ADES ABSY ADRF ADIF ADIE ADPS2 ADPS1 ADPS0 page 70
$05 ($25) ADCH - - - - - - ADC9 ADC8 page 71
$04 ($24) ADCL ADC7 ADC6 ADC5 ADC4 ADC3 ADC2 ADC1 ADC0 page 71
$03 ($23) PORTE PORTE7 PORTE6 PORTE5 PORTE4 PORTE3 PORTE2 PORTE1 PORTE0 page 87
$02 ($22) DDRE DDE7 DDE6 DDE5 DDE4 DDE3 DDE2 DDE1 DDE0 page 87
$01 ($21) PINE PINE7 PINE6 PINE5 PINE4 PINE3 PINE2 PINE1 PINE0 page 87
$00 ($20) PINF PINF7 PINF6 PINF5 PINF4 PINF3 PINF2 PINF1 PINF0 page 91