ATMEGA8535L-8AC Atmel, ATMEGA8535L-8AC Datasheet - Page 59

• Manufacturer Part Number: ATMEGA8535L-8AC
• Description: IC AVR MCU 8K LV 8MHZ COM 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8535L-8AC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Special Function IO Register –
SFIOR
Alternate Functions of Port A
2502K–AVR–10/06
• 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.
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 23. Port A Pins Alternate Functions
Table 24 and Table 25 relate the alternate functions of Port A to the overriding signals
shown in Figure 26 on page 57.
Table 24. Overriding Signals for Alternate Functions in PA7..PA4
Bit
Read/Write
Initial Value
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Port Pin
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
ADTS2
R/W
7
0
PA7/ADC7
0
0
0
0
0
0
0
0
–
ADC7 INPUT
ADTS1
R/W
6
0
Alternate Function
ADC7 (ADC input channel 7)
ADC6 (ADC input channel 6)
ADC5 (ADC input channel 5)
ADC4 (ADC input channel 4)
ADC3 (ADC input channel 3)
ADC2 (ADC input channel 2)
ADC1 (ADC input channel 1)
ADC0 (ADC input channel 0)
ADTS0
R/W
5
0
PA6/ADC6
0
0
0
0
0
0
0
0
–
ADC6 INPUT
R
4
–
0
ACME
R/W
3
0
PA5/ADC5
0
0
0
0
0
0
0
0
–
ADC5 INPUT
ATmega8535(L)
PUD
R/W
2
0
PSR2
R/W
1
0
PA4/ADC4
0
0
0
0
0
0
0
0
–
ADC4 INPUT
PSR10
R/W
0
0
SFIOR
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