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ATTINY12-8SC

P1-P3P4-P6P7-P9P10-P12P13-P15
7
ATtiny11/12
1006FS–AVR–06/07
Note: 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 one 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 ATtiny12
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 9
$3E Reserved
$3D Reserved
$3C Reserved
$3B GIMSK - INT0 PCIE - - - - - page 33
$3A GIFR - INTF0 PCIF - - - - - page 34
$39 TIMSK - - - - - - TOIE0 - page 34
$38 TIFR - - - - - -TOV0- page 35
$37 Reserved
$36 Reserved
$35 MCUCR - PUD SE SM - - ISC01 ISC00 page 32
$34 MCUSR - - - - WDRF BORF EXTRF PORF page 29
$33 TCCR0 - - - - - CS02 CS01 CS00 page 41
$32 TCNT0 Timer/Counter0 (8 Bit) page 41
$31 OSCCAL Oscillator Calibration Register page 12
$30 Reserved
... Reserved
$22 Reserved
$21 WDTCR - - - WDTOE WDE WDP2 WDP1 WDP0 page 43
$20 Reserved
$1F Reserved
$1E EEAR - - EEPROM Address Register page 18
$1D EEDR EEPROM Data Register page 18
$1C EECR - - - - EERIE EEMWE EEWE EERE page 18
$1B Reserved
$1A Reserved
$19 Reserved
$18 PORTB - - - PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 page 37
$17 DDRB - - DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 page 37
$16 PINB - - PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 page 37
$15 Reserved
... Reserved
$0A Reserved
$09 Reserved
$08 ACSR ACD AINBG ACO ACI ACIE - ACIS1 ACIS0 page 45
... Reserved
$00 Reserved
8
ATtiny11/12
1006FS–AVR–06/07
Instruction Set Summary
Mnemonics Operands Description Operation Flags #Clocks
ARITHMETIC AND LOGIC INSTRUCTIONS
ADD Rd, Rr Add two Registers Rd ← Rd + Rr Z,C,N,V,H 1
ADC Rd, Rr Add with Carry two Registers Rd ← Rd + Rr + C Z,C,N,V,H 1
SUB Rd, Rr Subtract two Registers Rd ← Rd - Rr Z,C,N,V,H 1
SUBI Rd, K Subtract Constant from Register Rd ← Rd - K Z,C,N,V,H 1
SBC Rd, Rr Subtract with Carry two Registers Rd ← Rd - Rr - C Z,C,N,V,H 1
SBCI Rd, K Subtract with Carry Constant from Reg. Rd ← Rd - K - C Z,C,N,V,H 1
AND Rd, Rr Logical AND Registers Rd ← Rd • Rr Z,N,V 1
ANDI Rd, K Logical AND Register and Constant Rd ← Rd • K Z,N,V 1
OR Rd, Rr Logical OR Registers Rd ← Rd v Rr Z,N,V 1
ORI Rd, K Logical OR Register and Constant Rd ← Rd v K Z,N,V 1
EOR Rd, Rr Exclusive OR Registers Rd ← Rd⊕Rr Z,N,V 1
COM Rd One’s Complement Rd ← $FF - Rd Z,C,N,V 1
NEG Rd Two’s Complement Rd ← $00 - Rd Z,C,N,V,H 1
SBR Rd,K Set Bit(s) in Register Rd ← Rd v K Z,N,V 1
CBR Rd,K Clear Bit(s) in Register Rd ← Rd • (FFh - K) Z,N,V 1
INC Rd Increment Rd ← Rd + 1 Z,N,V 1
DEC Rd Decrement Rd ← Rd - 1 Z,N,V 1
TST Rd Test for Zero or Minus Rd ← Rd • Rd Z,N,V 1
CLR Rd Clear Register Rd ← Rd⊕Rd Z,N,V 1
SER Rd Set Register Rd ← $FF None 1
BRANCH INSTRUCTIONS
RJMP k Relative Jump PC ← PC + k + 1 None 2
RCALL k Relative Subroutine Call PC ← PC + k + 1 None 3
RET Subroutine Return PC ← STACK None 4
RETI Interrupt Return PC ← STACK I 4
CPSE Rd,Rr Compare, Skip if Equal if (Rd = Rr) PC ← PC + 2 or 3 None 1/2
CP Rd,Rr Compare Rd - Rr Z, N,V,C,H 1
CPC Rd,Rr Compare with Carry Rd - Rr - C Z, N,V,C,H 1
CPI Rd,K Compare Register with Immediate Rd - K Z, N,V,C,H 1
SBRC Rr, b Skip if Bit in Register Cleared if (Rr(b)=0) PC ← PC + 2 or 3 None 1/2
SBRS Rr, b Skip if Bit in Register is Set if (Rr(b)=1) PC ← PC + 2 or 3 None 1/2
SBIC P, b Skip if Bit in I/O Register Cleared if (P(b)=0) PC ← PC + 2 or 3 None 1/2
SBIS P, b Skip if Bit in I/O Register is Set if (P(b)=1) PC ← PC + 2 or 3 None 1/2
BRBS s, k Branch if Status Flag Set if (SREG(s) = 1) then PC←PC + k + 1 None 1/2
BRBC s, k Branch if Status Flag Cleared if (SREG(s) = 0) then PC←PC + k + 1 None 1/2
BREQ k Branch if Equal if (Z = 1) then PC ← PC + k + 1 None 1/2
BRNE k Branch if Not Equal if (Z = 0) then PC ← PC + k + 1 None 1/2
BRCS k Branch if Carry Set if (C = 1) then PC ← PC + k + 1 None 1/2
BRCC k Branch if Carry Cleared if (C = 0) then PC ← PC + k + 1 None 1/2
BRSH k Branch if Same or Higher if (C = 0) then PC ← PC + k + 1 None 1/2
BRLO k Branch if Lower if (C = 1) then PC ← PC + k + 1 None 1/2
BRMI k Branch if Minus if (N = 1) then PC ← PC + k + 1 None 1/2
BRPL k Branch if Plus if (N = 0) then PC ← PC + k + 1 None 1/2
BRGE k Branch if Greater or Equal, Signed if (N ⊕ V= 0) then PC ← PC + k + 1 None 1/2
BRLT k Branch if Less Than Zero, Signed if (N ⊕ V= 1) then PC ← PC + k + 1 None 1/2
BRHS k Branch if Half Carry Flag Set if (H = 1) then PC ← PC + k + 1 None 1/2
BRHC k Branch if Half Carry Flag Cleared if (H = 0) then PC ← PC + k + 1 None 1/2
BRTS k Branch if T Flag Set if (T = 1) then PC ← PC + k + 1 None 1/2
BRTC k Branch if T Flag Cleared if (T = 0) then PC ← PC + k + 1 None 1/2
BRVS k Branch if Overflow Flag is Set if (V = 1) then PC ← PC + k + 1 None 1/2
BRVC k Branch if Overflow Flag is Cleared if (V = 0) then PC ← PC + k + 1 None 1/2
BRIE k Branch if Interrupt Enabled if ( I = 1) then PC ← PC + k + 1 None 1/2
BRID k Branch if Interrupt Disabled if ( I = 0) then PC ← PC + k + 1 None 1/2
9
ATtiny11/12
1006FS–AVR–06/07
DATA TRANSFER INSTRUCTIONS
LD Rd,Z Load Register Indirect Rd ← (Z) None 2
ST Z,Rr Store Register Indirect (Z) ← Rr None 2
MOV Rd, Rr Move Between Registers Rd ← Rr None 1
LDI Rd, K Load Immediate Rd ← KNone1
IN Rd, P In Port Rd ← PNone1
OUT P, Rr Out Port P ← Rr None 1
LPM Load Program Memory R0 ← (Z) None 3
BIT AND BIT-TEST INSTRUCTIONS
SBI P,b Set Bit in I/O Register I/O(P,b) ← 1None2
CBI P,b Clear Bit in I/O Register I/O(P,b) ← 0None2
LSL Rd Logical Shift Left Rd(n+1) ← Rd(n), Rd(0) ← 0 Z,C,N,V 1
LSR Rd Logical Shift Right Rd(n) ← Rd(n+1), Rd(7) ← 0 Z,C,N,V 1
ROL Rd Rotate Left Through Carry Rd(0) ← C, Rd(n+1) ← Rd(n), C ← Rd(7) Z,C,N,V 1
ROR Rd Rotate Right Through Carry Rd(7) ← C, Rd(n) ← Rd(n+1), C ← Rd(0) Z,C,N,V 1
ASR Rd Arithmetic Shift Right Rd(n) ← Rd(n+1), n = 0..6 Z,C,N,V 1
SWAP Rd Swap Nibbles Rd(3..0) ← Rd(7..4), Rd(7..4) ← Rd(3..0) None 1
BSET s Flag Set SREG(s) ← 1 SREG(s) 1
BCLR s Flag Clear SREG(s) ← 0 SREG(s) 1
BST Rr, b Bit Store from Register to T T ← Rr(b) T 1
BLD Rd, b Bit load from T to Register Rd(b) ← TNone1
SEC Set Carry C ← 1C1
CLC Clear Carry C ← 0 C 1
SEN Set Negative Flag N ← 1N1
CLN Clear Negative Flag N ← 0 N 1
SEZ Set Zero Flag Z ← 1Z1
CLZ Clear Zero Flag Z ← 0 Z 1
SEI Global Interrupt Enable I ← 1I1
CLI Global Interrupt Disable I ← 0 I 1
SES Set Signed Test Flag S ← 1S1
CLS Clear Signed Test Flag S ← 0 S 1
SEV Set Twos Complement Overflow V ← 1V1
CLV Clear Twos Complement Overflow V ← 0 V 1
SET Set T in SREG T ← 1T1
CLT Clear T in SREG T ← 0 T 1
SEH Set Half Carry Flag in SREG H ← 1H1
CLH Clear Half Carry Flag in SREG H ← 0 H 1
NOP No Operation None 1
SLEEP Sleep (see specific descr. for Sleep function) None 1
WDR Watch Dog Reset (see specific descr. for WDR/timer) None 1
Instruction Set Summary (Continued)
Mnemonics Operands Description Operation Flags #Clocks
P1-P3P4-P6P7-P9P10-P12P13-P15

ATTINY12-8SC

Mfr. #:
Buy ATTINY12-8SC
Manufacturer:
Microchip Technology / Atmel
Description:
8-bit Microcontrollers - MCU AVR 1K FLASH 64B EE 5V 8MHZ
Lifecycle:
New from this manufacturer.
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