ATTINY24A-SSUR Atmel, ATTINY24A-SSUR Datasheet - Page 128

• Manufacturer Part Number: ATTINY24A-SSUR
• Description: MCU AVR 2KB FLASH 20MHZ 14SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY24A-SSUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 12
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• 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: *
• Package: 14SOIC W
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 12
• Interface Type: SPI/USI
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

15. Analog Comparator
15.1
128
Analog Comparator Multiplexed Input
ATtiny24A/44A/84A
The analog comparator compares the input values on the positive pin AIN0 and negative pin
AIN1. When the voltage on the positive pin AIN0 is higher than the voltage on the negative pin
AIN1, the Analog Comparator Output, ACO, is set. The comparator can trigger a separate inter-
rupt, exclusive to the Analog Comparator. The user can select Interrupt triggering on comparator
output rise, fall or toggle. A block diagram of the comparator and its surrounding logic is shown
in
Figure 15-1.
Notes:
See
The ADC Power Reduction bit, PRADC, must be disabled in order to use the ADC input multi-
plexer. This is done by clearing the PRADC bit in the Power Reduction Register, PRR. See
“PRR – Power Reduction Register” on page 37
When the Analog to Digital Converter (ADC) is configurated as single ended input channel, it is
possible to select any of the ADC[7:0] pins to replace the negative input to the Analog Compara-
tor. The ADC multiplexer is used to select this input, and consequently, the ADC must be
switched off to utilize this feature. If the Analog Comparator Multiplexer Enable bit (ACME in
ADCSRB) is set and the ADC is switched off (ADEN in ADCSRA is zero), MUX[1:0] in ADMUX
select the input pin to replace the negative input to the analog comparator, as shown in
Figure
ADC MULTIPLEXER
Figure 1-1 on page 2
REFERENCE
ACME
ADEN
OUTPUT
BANDGAP
1. See
15-1.
(1)
ACBG
Table 15-1 on page
Analog Comparator Block Diagram
and
Table 10-9 on page 66
129.
for more details.
for Analog Comparator pin placement.
ACIC
8183C–AVR–03/11
To T/C1 Capture
Trigger MUX
Table