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ATMEGA8U2 Datasheet(PDF) 10 Page - ATMEL Corporation

No. de pieza ATMEGA8U2
Descripción Electrónicos  8-bit Microcontroller with 8/16/32K Bytes of ISP Flash and USB Controller
Download  21 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA8U2 Datasheet(HTML) 10 Page - ATMEL Corporation

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10
7799CS–AVR–12/09
ATmega8U2/16U2/32U2
Note:
1. For compatibility with future devices, reserved bits should be written to zero if accessed. Moreover reserved bits are not
guaranteed to be read as “0”. 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 reg-
isters as data space using LD and ST instructions, $20 must be added to these addresses. The ATmega8U2/16U2/32U2 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 - $1FF in SRAM, only the ST/STS/STD and LD/LDS/LDD
instructions can be used.
0x1A (0x3A)
Reserved
-
-
-
-
-
-
-
-
0x19 (0x39)
Reserved
-
-
-
-
-
-
-
-
0x18 (0x38)
Reserved
-
-
-
-
-
-
-
-
0x17 (0x37)
Reserved
-
-
-
-
-
-
-
-
0x16 (0x36)
TIFR1
-
-ICF1
-
OCF1C
OCF1B
OCF1A
TOV1
page 136
0x15 (0x35)
TIFR0
-
-
-
-
-
OCF0B
OCF0A
TOV0
page 107
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
page 83
0x0A (0x2A)
DDRD
DDD7
DDD6
DDD5
DDD4
DDD3
DDD2
DDD1
DDD0
page 83
0x09 (0x29)
PIND
PIND7
PIND6
PIND5
PIND4
PIND3
PIND2
PIND1
PIND0
page 83
0x08 (0x28)
PORTC
PORTC7
PORTC6
PORTC5
PORTC4
-
PORTC2
PORTC1
PORTC0
page 82
0x07 (0x27)
DDRC
DDC7
DDC6
DDC5
DDC4
-
DDC2
DDC1
DDC0
page 82
0x06 (0x26)
PINC
PINC7
PINC6
PINC5
PINC4
-
PINC2
PINC1
PINC0
page 82
0x05 (0x25)
PORTB
PORTB7
PORTB6
PORTB5
PORTB4
PORTB3
PORTB2
PORTB1
PORTB0
page 82
0x04 (0x24)
DDRB
DDB7
DDB6
DDB5
DDB4
DDB3
DDB2
DDB1
DDB0
page 82
0x03 (0x23)
PINB
PINB7
PINB6
PINB5
PINB4
PINB3
PINB2
PINB1
PINB0
page 82
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
Page


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