Atmel AVR AT90S8515-4 - Manual (Page 6)

6
AT90S8515
0841GS–09/01
Notes: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
should never be written.
2. Some of the status flags are cleared by writing a logical “1” to them. Note that the CBI and SBI instructions 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 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 page 20
$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) Reserved
$3B ($5B) GIMSK INT1 INT0 - - - - - - page 26
$3A ($5A) GIFR INTF1 INTF0 page 26
$39 ($59) TIMSK TOIE1 OCIE1A OCIE1B - TICIE1 - TOIE0 - page 27
$38 ($58) TIFR TOV1 OCF1A OCF1B - ICF1 - TOV0 - page 28
$37 ($57) Reserved
$36 ($56) Reserved
$35 ($55) MCUCR SRE SRW SE SM ISC11 ISC10 ISC01 ISC00 page 29
$34 ($54) Reserved
$33 ($53) TCCR0 - - - - - CS02 CS01 CS00 page 33
$32 ($52) TCNT0 Timer/Counter0 (8 Bits) page 34
... Reserved
$2F ($4F) TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 - - PWM11 PWM10 page 35
$2E ($4E) TCCR1B ICNC1 ICES1 - - CTC1 CS12 CS11 CS10 page 36
$2D ($4D) TCNT1H Timer/Counter1 – Counter Register High Byte page 38
$2C ($4C) TCNT1L Timer/Counter1 – Counter Register Low Byte page 38
$2B ($4B) OCR1AH Timer/Counter1 – Output Compare Register A High Byte page 38
$2A ($4A) OCR1AL Timer/Counter1 – Output Compare Register A Low Byte page 38
$29 ($49) OCR1BH Timer/Counter1 – Output Compare Register B High Byte page 39
$28 ($48) OCR1BL Timer/Counter1 – Output Compare Register B Low Byte page 39
... Reserved
$25 ($45) ICR1H Timer/Counter1 – Input Capture Register High Byte page 39
$24 ($44) ICR1L Timer/Counter1 – Input Capture Register Low Byte page 39
... Reserved
$21 ($41) WDTCR - - - WDTOE WDE WDP2 WDP1 WDP0 page 42
$20 ($40) Reserved
$1F ($3F) EEARH - - - - - - - EEAR8 page 44
$1E ($3E) EEARL EEPROM Address Register Low Byte page 44
$1D ($3D) EEDR EEPROM Data Register page 44
$1C ($3C) EECR - - - - - EEMWE EEWE EERE page 44
$1B ($3B) PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 page 63
$1A ($3A) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 page 63
$19 ($39) PINA PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 page 63
$18 ($38) PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 page 65
$17 ($37) DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 page 65
$16 ($36) PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 page 65
$15 ($35) PORTC PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 page 70
$14 ($34) DDRC DDC7 DDC6 DDC5 DDC4 DDC3 DDC2 DDC1 DDC0 page 71
$13 ($33) PINC PINC7 PINC6 PINC5 PINC4 PINC3 PINC2 PINC1 PINC0 page 71
$12 ($32) PORTD PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0 page 73
$11 ($31) DDRD DDD7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0 page 73
$10 ($30) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0 page 73
$0F ($2F) SPDR SPI Data Register page 51
$0E ($2E) SPSR SPIF WCOL - - - - - - page 50
$0D ($2D) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 page 49
$0C ($2C) UDR UART I/O Data Register page 55
$0B ($2B) USR RXC TXC UDRE FE OR - - - page 55
$0A ($2A) UCR RXCIE TXCIE UDRIE RXEN TXEN CHR9 RXB8 TXB8 page 56
$09 ($29) UBRR UART Baud Rate Register page 58
$08 ($28) ACSR ACD - ACO ACI ACIE ACIC ACIS1 ACIS0 page 59
… Reserved
$00 ($20) Reserved