ATMEGA8535-16PJ Atmel, ATMEGA8535-16PJ Datasheet - Page 221
![IC MCU AVR 8K 5V 16MHZ 40-DIP](/photos/6/70/67049/453-40-dip_sml.jpg)
ATMEGA8535-16PJ
Manufacturer Part Number
ATMEGA8535-16PJ
Description
IC MCU AVR 8K 5V 16MHZ 40-DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8535-16PJ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
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)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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ADC Control and Status
Register A – ADCSRA
2502K–AVR–10/06
Table 85. Input Channel and Gain Selections (Continued)
• Bit 7 – ADEN: ADC Enable
Writing this bit to one enables the ADC. By writing it to zero, the ADC is turned off. Turn-
ing the ADC off while a conversion is in progress, will terminate this conversion.
• Bit 6 – ADSC: ADC Start Conversion
In Single Conversion mode, write this bit to one to start each conversion. In Free Run-
ning mode, write this bit to one to start the first conversion. The first conversion after
ADSC has been written after the ADC has been enabled, or if ADSC is written at the
same time as the ADC is enabled, will take 25 ADC clock cycles instead of the normal
13. This first conversion performs initialization of the ADC.
ADSC will read as one as long as a conversion is in progress. When the conversion is
complete, it returns to zero. Writing zero to this bit has no effect.
• Bit 5 – ADATE: ADC Auto Trigger Enable
When this bit is written to one, Auto Triggering of the ADC is enabled. The ADC will start
a conversion on a positive edge of the selected trigger signal. The trigger source is
selected by setting the ADC Trigger Select bits, ADTS in SFIOR.
• Bit 4 – ADIF: ADC Interrupt Flag
This bit is set when an ADC conversion completes and the Data Registers are updated.
The ADC Conversion Complete Interrupt is executed if the ADIE bit and the I-bit in
SREG are set. ADIF is cleared by hardware when executing the corresponding interrupt
handling vector. Alternatively, ADIF is cleared by writing a logical one to the flag.
Beware that if doing a Read-Modify-Write on ADCSRA, a pending interrupt can be dis-
abled. This also applies if the SBI and CBI instructions are used.
• Bit 3 – ADIE: ADC Interrupt Enable
When this bit is written to one and the I-bit in SREG is set, the ADC Conversion Com-
plete Interrupt is activated.
• Bits 2:0 – ADPS2:0: ADC Prescaler Select Bits
These bits determine the division factor between the XTAL frequency and the input
clock to the ADC.
Bit
Read/Write
Initial Value
MUX4..0
11101
11110
11111
1.22V (V
Single Ended Input
0V (GND)
ADEN
R/W
7
0
BG
)
ADSC
R/W
6
0
ADATE
R/W
5
0
Pos Differential Input
ADC5
N/A
ADIF
R/W
4
0
ADIE
R/W
3
0
ADPS2
R/W
2
0
ATmega8535(L)
Neg Differential Input
ADC2
ADPS1
R/W
1
0
ADPS0
R/W
0
0
ADCSRA
Gain
1x
221
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