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ATmega32A датащи(PDF) 66 Page - ATMEL Corporation

номер детали ATmega32A
подробное описание детали  8-bit Microcontroller with 32K Bytes In-System Programmable Flash
PDF  352 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega32A датащи(HTML) 66 Page - ATMEL Corporation

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66
8155B–AVR–07/09
ATmega32A
12.4
Register Description
12.4.1
SFIOR – Special Function I/O Register
• Bit 2 – 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 51 for more details about this feature.
12.4.2
PORTA – Port A Data Register
12.4.3
DDRA – Port A Data Direction Register
12.4.4
PINA – Port A Input Pins Address
Table 12-14. Overriding Signals for Alternate Functions in PD3:PD0
Signal Name
PD3/INT1
PD2/INT0
PD1/TXD
PD0/RXD
PUOE
0
0
TXEN
RXEN
PUOV
0
0
0
PORTD0 • PUD
DDOE
0
0
TXEN
RXEN
DDOV
0
0
1
0
PVOE
0
0
TXEN
0
PVOV
0
0
TXD
0
DIEOE
INT1 ENABLE
INT0 ENABLE
0
0
DIEOV
1
1
0
0
DI
INT1 INPUT
INT0 INPUT
–
RXD
AIO
–
–
–
–
Bit
7
6
5
4
3
2
1
0
ADTS2
ADTS1
ADTS0
–
ACME
PUD
PSR2
PSR10
SFIOR
Read/Write
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
6
5432
10
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
0
0
0000
00
Bit
765
432
10
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
0
0
0
0
0
0
0
0
Bit
765
432
10
PINA7
PINA6
PINA5
PINA4
PINA3
PINA2
PINA1
PINA0
PINA
Read/Write
RR
RRR
RRR
Initial Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A



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