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ATtiny261A Scheda tecnica(PDF) 67 Page - ATMEL Corporation

Il numero della parte ATtiny261A
Spiegazioni elettronici  8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
PDF  292 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny261A Scheda tecnica(HTML) 67 Page - ATMEL Corporation

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67
8197A–AVR–10/09
ATtiny261A/461A/861A
Note:
1. INTRC means that one of the internal oscillators is selected (by the CKSEL fuses), EXTCK
means that external clock is selected (by the CKSEL fuses).
10.3 Register Description
10.3.1
MCUCR – MCU Control Register
• Bit 6 – PUD: Pull-up Disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See “Con-
figuring the Pin” on page 54 for more details about this feature.
10.3.2
PORTA – Port A Data Register
10.3.3
DDRA – Port A Data Direction Register
Table 10-8.
Overriding Signals for Alternate Functions in PB3:PB0
Signal
Name
PB3/OC1B/
PCINT11
PB2/SCK/USCK/SCL/O
C1B/PCINT10
PB1/MISO/DO/OC1A/
PCINT9
PB0/MOSI/DI/SDA/
OC1A/PCINT8
PUOE
0
0
0
0
PUOV
0
0
0
0
DDOE
0
USI_TWO_WIRE •
USIPOS
0
USI_TWO_WIRE •
USIPOS
DDOV
0
(USI_SCL_HOLD +
PORTB2) • DDB2 •
USIPOS
0
(SDA + PORTB0) •
DDB0 • USIPOS
PVOE
OC1B Enable
OC1B Enable + USIPOS
• USI_TWO_WIRE •
DDB2
OC1A Enable +
USIPOS •
USI_THREE_WIRE
OC1A Enable +
(USI_TWO_WIRE •
DDB0 • USIPOS)
PVOV
OC1B
OC1B
OC1A + (DO •
USIPOS)
OC1A
PTOE
0
USITC • USIPOS
00
DIEOE
PCINT11 • PCIE
PCINT10 • PCIE +
USISIE • USIPOS
PCINT9 • PCIE
PCINT8 • PCIE +
(USISIE • USIPOS)
DIEOV
0
0
0
0
DI
PCINT11
USCK/SCL/PCINT10
PCINT9
DI/SDA/PCINT8
AIO
Bit
7
6
5
4
3
2
1
0
0x35 (0x55)
BODS
PUD
SE
SM1
SM0
BODSE
ISC01
ISC00
MCUCR
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R
R
Initial Value
0
0
0
0
0
0
0
0
Bit
76543
210
0x1B (0x3B)
PORTA7
PORTA6
PORTA5
PORTA4
PORTA3
PORTA2
PORTA1
PORTA0
PORTA
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
00000
000
Bit
76543
210
0x1A (0x3A)
DDA7
DDA6
DDA5
DDA4
DDA3
DDA2
DDA1
DDA0
DDRA
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
00000
000



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