148
ATtiny4/5/9/10 [DATASHEET]
8127F–AVR–02/2013
18. Register Summary
Note:
1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Page
0x3F
SREG
I
T
H
S
V
N
Z
C
0x3E
SPH
Stack Pointer High Byte
0x3D
SPL
Stack Pointer Low Byte
0x3C
CCP
CPU Change Protection Byte
0x3B
RSTFLR
–
–WDRF
–
EXTRF
PORF
0x3A
SMCR
–
SM2
SM1
SM0
SE
0x39
OSCCAL
Oscillator Calibration Byte
0x38
Reserved
–
0x37
CLKMSR
–
CLKMS1
CLKMS0
0x36
CLKPSR
–
CLKPS3
CLKPS2
CLKPS1
CLKPS0
0x35
PRR
–
PRADC
PRTIM0
0x34
VLMCSR
VLMF
VLMIE
–
VLM2
VLM1
VLM0
0x33
NVMCMD
–
NVM Comman
0x32
NVMCSR
NVMBSY
–
0x31
WDTCSR
WDIF
WDIE
WDP3
–
WDE
WDP2
WDP1
WDP0
0x30
Reserved
–
0x2F
GTCCR
TSM
–
–PSR
0x2E
TCCR0A
COM0A1
COM0A0
COM0B1
COM0B0
–
WGM01
WGM00
0x2D
TCCR0B
ICNC0
ICES0
–
WGM03
WGM02
CS02
CS01
CS00
0x2C
TCCR0C
FOC0A
FOC0B
–
0x2B
TIMSK0
–
–ICIE0
–
OCIE0B
OCIE0A
TOIE0
0x2A
TIFR0
–
–ICF0
–
OCF0B
OCF0A
TOV0
0x29
TCNT0H
Timer/Counter0 – Counter Register High Byte
0x28
TCNT0L
Timer/Counter0 – Counter Register Low Byte
0x27
OCR0AH
Timer/Counter0 – Compare Register A High Byte
0x26
OCR0AL
Timer/Counter0 – Compare Register A Low Byte
0x25
OCR0BH
Timer/Counter0 – Compare Register B High Byte
0x24
OCR0BL
Timer/Counter0 – Compare Register B Low Byte
0x23
ICR0H
Timer/Counter0 - Input Capture Register High Byte
0x22
ICR0L
Timer/Counter0 - Input Capture Register Low Byte
0x21
Reserved
–
0x20
Reserved
–
0x1F
ACSR
ACD
–
ACO
ACI
ACIE
ACIC
ACIS1
ACIS0
0x1E
Reserved
–
0x1D
ADCSRA
ADEN
ADSC
ADATE
ADIF
ADIE
ADPS2
ADPS1
ADPS0
0x1C
ADCSRB
–
ADTS2
ADTS1
ADTS0
0x1B
ADMUX
–
MUX1
MUX0
0x1A
Reserved
–
0x19
ADCL
ADC Conversion Result
0x18
Reserved
–
0x17
DIDR0
–
ADC3D
ADC2D
ADC1D
ADC0D
0x16
Reserved
–
0x15
EICRA
–
ISC01
ISC00
0x14
EIFR
–
INTF0
0x13
EIMSK
–
INT0
0x12
PCICR
–
PCIE0
0x11
PCIFR
–
–PCIF0
0x10
PCMSK
–
PCINT3
PCINT2
PCINT1
PCINT0
0x0F
Reserved
–
0x0E
Reserved
–
0x0D
Reserved
–
0x0C
PORTCR
–
BBMB
–
0x0B
Reserved
–
0x0A
Reserved
–
0x09
Reserved
–
0x08
Reserved
–
0x07
Reserved
–
0x06
Reserved
–
0x05
Reserved
–
0x04
Reserved
–
0x03
PUEB
–
PUEB3
PUEB2
PUEB1
PUEB0
0x02
PORTB
–
PORTB3
PORTB2
PORTB1
PORTB0
0x01
DDRB
–
DDRB3
DDRB2
DDRB1
DDRB0
0x00
PINB
–
PINB3
PINB2
PINB1
PINB0