ATMEGA8535-16AC datasheet(59/321 Pages) ATMEL

부품명	ATMEGA8535-16AC

상세설명	8-bit Microcontrolle with 8K Bytes In-System Programmable Flash

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59

ATmega8535(L)

2502K–AVR–10/06

Special Function IO Register –

SFIOR

• 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 “Configuring the Pin” on page 52 for more details about this feature.

Alternate Functions of Port A

Port A has an alternate function as analog input for the ADC as shown in Table 23. If

some Port A pins are configured as outputs, it is essential that these do not switch when

a conversion is in progress. This might corrupt the result of the conversion.

Table 24 and Table 25 relate the alternate functions of Port A to the overriding signals

shown in Figure 26 on page 57.

Bit

7

6

5

4

3

2

1

0

ADTS2

ADTS1

ADTS0

–

ACME

PUD

PSR2

PSR10

SFIOR

Read/Write

R/W

R

R/W

Initial Value

0

Table 23. Port A Pins Alternate Functions

Port Pin

Alternate Function

PA7

ADC7 (ADC input channel 7)

PA6

ADC6 (ADC input channel 6)

PA5

ADC5 (ADC input channel 5)

PA4

ADC4 (ADC input channel 4)

PA3

ADC3 (ADC input channel 3)

PA2

ADC2 (ADC input channel 2)

PA1

ADC1 (ADC input channel 1)

PA0

ADC0 (ADC input channel 0)

Table 24. Overriding Signals for Alternate Functions in PA7..PA4

Signal Name

PA7/ADC7

PA6/ADC6

PA5/ADC5

PA4/ADC4

PUOE

0000

PUOV

0000

DDOE

0000

DDOV

0000

PVOE

0000

PVOV

0000

DIEOE

0000

DIEOV

0000

DI

––––

AIO

ADC7 INPUT

ADC6 INPUT

ADC5 INPUT

ADC4 INPUT

유사한 부품 번호 - ATMEGA8535-16AC

제조업체	부품명	데이터시트	상세설명
ATMEL Corporation	ATMEGA8535-16AC	264Kb / 22P	8-bit AVR Microcontroller with 8K Bytes In-System Programmable Flash

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