Rainbow Electronics ATmega64M1 User Manual

Page 325

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325

8209A–AVR–08/09

ATmega16M1/32M1/64M1

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. I/O Registers within the address range 0x00 - 0x1F are directly bit-accessible using the SBI and CBI instructions. In these

registers, 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, unlike most other AVRs, the CBI and SBI

instructions will only operate on the specified bit, and can therefore be used on registers containing such status flags. 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 0x00 - 0x3F must be used. When addressing I/O

Registers as data space using LD and ST instructions, 0x20 must be added to these addresses. The
ATmega16M1/32M1/64M1 is a complex microcontroller with more peripheral units than can be supported within the 64 loca-
tion reserved in Opcode for the IN and OUT instructions. For the Extended I/O space from 0x60 - 0xFF in SRAM, only the
ST/STS/STD and LD/LDS/LDD instructions can be used.

5. These registers are only available on ATmega32/64M1. For other products described in this datasheet, these locations are

reserved.

0x1A (0x3A)

GPIOR2

GPIOR27

GPIOR26

GPIOR25

GPIOR24

GPIOR23

GPIOR22

GPIOR21

GPIOR20

page 26

0x19 (0x39)

GPIOR1

GPIOR17

GPIOR16

GPIOR15

GPIOR14

GPIOR13

GPIOR12

GPIOR11

GPIOR10

page 26

0x18 (0x38)

Reserved

–

–

–

–

–

–

–

–

0x17 (0x37)

Reserved

–

–

–

–

–

–

–

–

0x16 (0x36)

TIFR1

–

–

ICF1

–

–

OCF1B

OCF1A

TOV1

page 130

0x15 (0x35)

TIFR0

–

–

–

–

–

OCF0B

OCF0A

TOV0

page 102

0x14 (0x34)

Reserved

–

–

–

–

–

–

–

–

0x13 (0x33)

Reserved

–

–

–

–

–

–

–

–

0x12 (0x32)

Reserved

–

–

–

–

–

–

–

–

0x11 (0x31)

Reserved

–

–

–

–

–

–

–

–

0x10 (0x30)

Reserved

–

–

–

–

–

–

–

–

0x0F (0x2F)

Reserved

–

–

–

–

–

–

–

–

0x0E (0x2E)

PORTE

–

–

–

–

–

PORTE2

PORTE1

PORTE0

page 85

0x0D (0x2D)

DDRE

–

–

–

–

–

DDE2

DDE1

DDE0

page 85

0x0C (0x2C)

PINE

–

–

–

–

–

PINE2

PINE1

PINE0

page 85

0x0B (0x2B)

PORTD

PORTD7

PORTD6

PORTD5

PORTD4

PORTD3

PORTD2

PORTD1

PORTD0

page 85

0x0A (0x2A)

DDRD

DDD7

DDD6

DDD5

DDD4

DDD3

DDD2

DDD1

DDD0

page 85

0x09 (0x29)

PIND

PIND7

PIND6

PIND5

PIND4

PIND3

PIND2

PIND1

PIND0

page 85

0x08 (0x28)

PORTC

PORTC7

PORTC6

PORTC5

PORTC4

PORTC3

PORTC2

PORTC1

PORTC0

page 84

0x07 (0x27)

DDRC

DDC7

DDC6

DDC5

DDC4

DDC3

DDC2

DDC1

DDC0

page 84

0x06 (0x26)

PINC

PINC7

PINC6

PINC5

PINC4

PINC3

PINC2

PINC1

PINC0

page 84

0x05 (0x25)

PORTB

PORTB7

PORTB6

PORTB5

PORTB4

PORTB3

PORTB2

PORTB1

PORTB0

page 84

0x04 (0x24)

DDRB

DDB7

DDB6

DDB5

DDB4

DDB3

DDB2

DDB1

DDB0

page 84

0x03 (0x23)

PINB

PINB7

PINB6

PINB5

PINB4

PINB3

PINB2

PINB1

PINB0

page 84

0x02 (0x22)

Reserved

–

–

–

–

–

–

–

–

0x01 (0x21)

Reserved

–

–

–

–

–

–

–

–

0x00 (0x20)

Reserved

–

–

–

–

–

–

–

–

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

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