ATtiny85 Atmel Corporation, ATtiny85 Datasheet - Page 123

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ATtiny85

Manufacturer Part Number
ATtiny85
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATtiny85

Flash (kbytes)
8 Kbytes
Pin Count
8
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
3
Hardware Qtouch Acquisition
No
Max I/o Pins
6
Ext Interrupts
6
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
4
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
5
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes

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16. Analog Comparator
16.1
2586N–AVR–04/11
Analog Comparator Multiplexed Input
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 16-1. Analog Comparator Block Diagram
Notes:
See
When the Analog to Digital Converter (ADC) is configurated as single ended input channel, it is
possible to select any of the ADC[3:0] 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
16-1. If ACME is cleared or ADEN is set, AIN1 is applied to the negative input to the Analog
Comparator.
Table 16-1.
Figure
ACME
ADC MULTIPLEXER
Figure 1-1 on page 2
INTERNAL 1.1V
0
1
1
1
1
1
REFERENCE
ACME
ADEN
OUTPUT
1. See
16-1.
AIN0
AIN1
(1)
Analog Comparator Multiplexed Input
Table 16-1
ACBG
ADEN
x
1
0
0
0
0
below.
and
MUX[1:0]
Table 10-5 on page 65
ACD
00
01
10
11
xx
xx
+
_
VCC
Analog Comparator Negative Input
AIN1
AIN1
ADC0
ADC1
ADC2
ADC3
for Analog Comparator pin placement.
ACIS1
INTERRUPT
SELECT
ACIS0
ATtiny25/45/85
ACIE
ACO
ANALOG
COMP ARATOR
IRQ
ACI
Table
123

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