ATTINY20-XU Atmel, ATTINY20-XU Datasheet - Page 113

• Manufacturer Part Number: ATTINY20-XU
• Description: MCU AVR 2KB FLASH 12MHZ 14TSSOP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY20-XU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: ATtiny
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SPI, TWI
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

15.3
8235B–AVR–04/11
Operation
Figure 15-1. Analog to Digital Converter Block Schematic
In order to be able to use the ADC the Power Reduction bit, PRADC, in the Power Reduction
Register must be disabled. This is done by clearing the PRADC bit. See
tion Register” on page 29
The ADC is enabled by setting the ADC Enable bit, ADEN in ADCSRA. Voltage reference and
input channel selections will not go into effect until ADEN is set. The ADC does not consume
power when ADEN is cleared, so it is recommended to switch off the ADC before entering power
saving sleep modes.
ADC7
ADC7
ADC6
ADC6
ADC5
ADC5
ADC4
ADC4
ADC3
ADC3
ADC2
ADC2
ADC1
ADC1
ADC0
ADC0
V
CC
CC
TEMPERATURE
TEMPERATURE
REFERENCE
REFERENCE
INTERNAL
INTERNAL
SENSOR
SENSOR
8-BIT DATA BUS
AGND
ADMUX
ADMUX
DECODER
DECODER
for more details.
ADCSRB
ADCSRB
INPUT
INPUT
MUX
MUX
TRIGGER
TRIGGER
SELECT
SELECT
10-BIT DAC
10-BIT DAC
PRESCALER
PRESCALER
ADCSRA
ADCSRA
CONVERSION LOGIC
CONVERSION LOGIC
“PRR – Power Reduc-
SAMPLE & HOLD
SAMPLE & HOLD
COMPARATOR
COMPARATOR
-
+
ATtiny20
ADCH+ADCL
ADCH+ADCL
ADC MUX OUTPUT
ADC MUX OUTPUT
ADC IRQ
ADC IRQ
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