ATtiny48/88
Address
(0xBF)
(0xBE)
(0xBD)
(0xBC)
(0xBB)
(0xBA)
(0xB9)
(0xB8)
(0xB7)
(0xB6)
(0xB5)
(0xB4)
(0xB3)
(0xB2)
(0xB1)
(0xB0)
(0xAF)
(0xAE)
(0xAD)
(0xAC)
(0xAB)
(0xAA)
(0xA9)
(0xA8)
(0xA7)
(0xA6)
(0xA5)
(0xA4)
(0xA3)
(0xA2)
(0xA1)
(0xA0)
(0x9F)
(0x9E)
(0x9D)
(0x9C)
(0x9B)
(0x9A)
(0x99)
(0x98)
(0x97)
(0x96)
(0x95)
(0x94)
(0x93)
(0x92)
(0x91)
(0x90)
(0x8F)
(0x8E)
(0x8D)
(0x8C)
(0x8B)
(0x8A)
(0x89)
(0x88)
(0x87)
(0x86)
(0x85)
(0x84)
(0x83)
(0x82)
(0x81)
(0x80)
(0x7F)
(0x7E)
Name
Reserved
TWHSR
TWAMR
TWCR
TWDR
TWAR
TWSR
TWBR
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
OCR1BH
OCR1BL
OCR1AH
OCR1AL
ICR1H
ICR1L
TCNT1H
TCNT1L
Reserved
TCCR1C
TCCR1B
TCCR1A
DIDR1
DIDR0
Bit 7
–
–
TWAM6
TWINT
TWA6
TWS7
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
FOC1A
ICNC1
COM1A1
–
ADC7D
Bit 6
–
–
TWAM5
TWEA
TWA5
TWS6
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
FOC1B
ICES1
COM1A0
–
ADC6D
Bit 5
Bit 4
Bit 3
Bit 2
–
–
–
–
–
–
–
–
TWAM4
TWAM3
TWAM2
TWAM1
TWSTA
TWSTO
TWWC
TWEN
2-wire Serial Interface Data Register
TWA4
TWA3
TWA2
TWA1
TWS5
TWS4
TWS3
–
2-wire Serial Interface Bit Rate Register
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
– Timer/Counter1 Output Compare Register B High Byte
– Timer/Counter1 Output Compare Register B Low Byte
– Timer/Counter1 Output Compare Register A High Byte
– Timer/Counter1 Output Compare Register A Low Byte
– Timer/Counter1 Input Capture Register High Byte
– Timer/Counter1 Input Capture Register Low Byte
– Timer/Counter1 Counter Register High Byte
– Timer/Counter1 Counter Register Low Byte
–
–
–
–
–
–
–
–
–
WGM13
WGM12
CS12
COM1B1
COM1B0
–
–
–
–
–
–
ADC5D
ADC4D
ADC3D
ADC2D
Bit 1
–
–
TWAM0
–
TWA0
TWPS1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
CS11
WGM11
AIN1D
ADC1D
Bit 0
–
TWHS
–
TWIE
TWGCE
TWPS0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
CS10
WGM10
AIN0D
ADC0D
8008BS–AVR–06/08
Page
152
152
149
151
151
150
149
108
108
108
108
109
109
108
108
107
106
104
155
171
9