Rainbow Electronics AT90S1200 - Manual (Page 62)

62
AT90S1200
0838H–AVR–03/02
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 “1” back into any flag read as set, thus clearing the flag. The CBI and SBI instructions work
with registers $00 to $1F only.
AT90S1200 Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
$3F SREG I T H S V N Z C page 11
$3E Reserved
$3D Reserved
$3C Reserved
$3B GIMSK - INT0 - - - - - - page 15
$3A Reserved
$39 TIMSK - - - - - - TOIE0 - page 16
$38 TIFR - - - - - - TOV0 - page 16
$37 Reserved
$36 Reserved
$35 MCUCR - - SE SM - - ISC01 ISC00 page 18
$34 Reserved
$33 TCCR0 - - - - - CS02 CS01 CS00 page 21
$32 TCNT0 Timer/Counter0 (8 Bits) page 22
$31 Reserved
$30 Reserved
$2F Reserved
$2E Reserved
$2D Reserved
$2C Reserved
$2B Reserved
$2A Reserved
$29 Reserved
$28 Reserved
$27 Reserved
$26 Reserved
$25 Reserved
$24 Reserved
$23 Reserved
$22 Reserved
$21 WDTCR - - - - WDE WDP2 WDP1 WDP0 page 23
$20 Reserved
$1F Reserved
$1E EEAR - EEPROM Address Register page 25
$1D EEDR EEPROM Data Register page 25
$1C EECR - - - - - - EEWE EERE page 25
$1B Reserved
$1A Reserved
$19 Reserved
$18 PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 page 29
$17 DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 page 29
$16 PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 page 29
$15 Reserved
$14 Reserved
$13 Reserved
$12 PORTD - PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0 page 34
$11 DDRD - DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0 page 34
$10 PIND - PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0 page 34
$0F Reserved
... Reserved
$09 Reserved
$08 ACSR ACD - ACO ACI ACIE - ACIS1 ACIS0 page 27
… Reserved
$00 Reserved