ATmega164P/324P/644P
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
Reserved
TWAMR
TWCR
TWDR
TWAR
TWSR
TWBR
Reserved
ASSR
Reserved
OCR2B
OCR2A
TCNT2
TCCR2B
TCCR2A
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
-
-
-
Bit 6
-
-
TWAM5
TWEA
TWA5
TWS6
-
EXCLK
-
Bit 5
-
-
TWAM4
TWSTA
TWA4
TWS5
-
AS2
-
Bit 4
-
-
TWAM3
TWSTO
TWA3
TWS4
-
TCN2UB
-
Bit 3
-
-
TWAM2
TWWC
TWA2
TWS3
-
OCR2AUB
-
Bit 2
-
-
TWAM1
TWEN
TWA1
-
-
OCR2BUB
-
Bit 1
-
-
TWAM0
-
TWA0
TWPS1
-
TCR2AUB
-
Bit 0
-
-
-
TWIE
TWGCE
TWPS0
-
TCR2BUB
-
Page
232
228
230
232
230
228
153
152
152
152
2-wire Serial Interface Data Register
2-wire Serial Interface Bit Rate Register
Timer/Counter2 Output Compare Register B
Timer/Counter2 Output Compare Register A
Timer/Counter2 (8 Bit)
FOC2A
COM2A1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
FOC2B
COM2A0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
COM2B1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
COM2B0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
WGM22
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CS22
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CS21
WGM21
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CS20
WGM20
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
151
148
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
-
FOC1A
ICNC1
COM1A1
-
ADC7D
-
FOC1B
ICES1
COM1A0
-
ADC6D
-
-
-
COM1B1
-
ADC5D
-
-
WGM13
COM1B0
-
ADC4D
-
-
WGM12
-
-
ADC3D
-
-
CS12
-
-
ADC2D
-
-
CS11
WGM11
AIN1D
ADC1D
-
-
CS10
WGM10
AIN0D
ADC0D
134
134
134
134
135
135
134
134
133
132
130
235
255
9
8011DS–AVR–02/07
ATMEL [ ATMEL CORPORATION ]
