ATTINY48-MMHR Atmel, ATTINY48-MMHR Datasheet - Page 165

• Manufacturer Part Number: ATTINY48-MMHR
• Description: MCU AVR 4KB FLASH 12MHZ 28QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY48-MMHR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 24
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 256 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17.3
8008G–AVR–04/11
Operation
Figure 17-1. Analog to Digital Converter Block Schematic Operation
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 40
The ADC converts an analog input voltage to a 10-bit digital value through successive approxi-
mation. The minimum value represents GND and the maximum value represents the reference
voltage. The ADC voltage reference may be selected by writing the REFS0 bit in the ADMUX
register. Alternatives are the V
AVCC
ADC7
ADC6
ADC5
ADC4
ADC3
ADC2
ADC1
ADC0
GND
TEMPERATURE
INTERNAL 1.1V
REFERENCE
REFERENCE
BANDGAP
SENSOR
8-BIT DATA BUS
INPUT
MUX
ADC MULTIPLEXER
for more details.
SELECT (ADMUX)
CC
MUX DECODER
supply pin and the internal 1.1V voltage reference.
10-BIT DAC
ADC CTRL. & STATUS
REGISTER (ADCSRA)
ADC CONVERSION
COMPLETE IRQ
CONVERSION LOGIC
PRESCALER
SAMPLE & HOLD
COMPARATOR
15
+
-
ATtiny48/88
“PRR – Power Reduc-
ADC DATA REGISTER
(ADCH/ADCL)
ADC MULTIPLEXER
OUTPUT
0
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