Atmel ATmega324PA User Manual
Page 13
13
8152GS–AVR–11/09
ATmega164PA/324PA/644PA/1284P
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. I/O registers within the address range $00 - $1F are directly bit-accessible using the SBI and CBI instructions. In these reg-
isters, the value of single bits can be checked by using the SBIS and SBIC instructions.
3. 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 0x00 to 0x1F only.
4. When using the I/O specific commands IN and OUT, the I/O addresses $00 - $3F must be used. When addressing I/O regis-
ters as data space using LD and ST instructions, $20 must be added to these addresses. The
ATmega164PA/324PA/644PA/1284P is a complex microcontroller with more peripheral units than can be supported within
the 64 location reserved in Opcode for the IN and OUT instructions. For the Extended I/O space from $60 - $FF
, only the
ST/STS/STD and LD/LDS/LDD instructions can be used.
0x1C (0x3C)
EIFR
-
-
-
-
-
INTF2
INTF1
INTF0
69
0x1B (0x3B)
PCIFR
-
-
-
-
PCIF3
PCIF2
PCIF1
PCIF0
70
0x1A (0x3A)
Reserved
-
-
-
-
-
-
-
-
0x19 (0x39)
Reserved
-
-
-
-
-
-
-
-
0x18 (0x38)
Reserved
-
-
-
-
-
-
-
-
0x17 (0x37)
TIFR2
-
-
-
-
-
OCF2B
OCF2A
TOV2
160
0x16 (0x36)
TIFR1
-
-
ICF1
-
-
OCF1B
OCF1A
TOV1
139
0x15 (0x35)
TIFR0
-
-
-
-
-
OCF0B
OCF0A
TOV0
110
0x14 (0x34)
Reserved
-
-
-
-
-
-
-
-
0x13 (0x33)
Reserved
-
-
-
-
-
-
-
-
0x12 (0x32)
Reserved
-
-
-
-
-
-
-
-
0x11 (0x31)
Reserved
-
-
-
-
-
-
-
-
0x10 (0x30)
Reserved
-
-
-
-
-
-
-
-
0x0F (0x2F)
Reserved
-
-
-
-
-
-
-
-
0x0E (0x2E)
Reserved
-
-
-
-
-
-
-
-
0x0D (0x2D)
Reserved
-
-
-
-
-
-
-
-
0x0C (0x2C)
Reserved
-
-
-
-
-
-
-
-
0x0B (0x2B)
PORTD
PORTD7
PORTD6
PORTD5
PORTD4
PORTD3
PORTD2
PORTD1
PORTD0
93
0x0A (0x2A)
DDRD
DDD7
DDD6
DDD5
DDD4
DDD3
DDD2
DDD1
DDD0
93
0x09 (0x29)
PIND
PIND7
PIND6
PIND5
PIND4
PIND3
PIND2
PIND1
PIND0
93
0x08 (0x28)
PORTC
PORTC7
PORTC6
PORTC5
PORTC4
PORTC3
PORTC2
PORTC1
PORTC0
93
0x07 (0x27)
DDRC
DDC7
DDC6
DDC5
DDC4
DDC3
DDC2
DDC1
DDC0
93
0x06 (0x26)
PINC
PINC7
PINC6
PINC5
PINC4
PINC3
PINC2
PINC1
PINC0
93
0x05 (0x25)
PORTB
PORTB7
PORTB6
PORTB5
PORTB4
PORTB3
PORTB2
PORTB1
PORTB0
92
0x04 (0x24)
DDRB
DDB7
DDB6
DDB5
DDB4
DDB3
DDB2
DDB1
DDB0
92
0x03 (0x23)
PINB
PINB7
PINB6
PINB5
PINB4
PINB3
PINB2
PINB1
PINB0
92
0x02 (0x22)
PORTA
PORTA7
PORTA6
PORTA5
PORTA4
PORTA3
PORTA2
PORTA1
PORTA0
92
0x01 (0x21)
DDRA
DDA7
DDA6
DDA5
DDA4
DDA3
DDA2
DDA1
DDA0
92
0x00 (0x20)
PINA
PINA7
PINA6
PINA5
PINA4
PINA3
PINA2
PINA1
PINA0
92
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
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