ATMEGA64-16AI Atmel, ATMEGA64-16AI Datasheet - Page 227

• Manufacturer Part Number: ATMEGA64-16AI
• Description: IC AVR MCU 64K 16MHZ IND 64-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64-16AI

• 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: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K 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: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Analog
Comparator
SFIOR – Special
Function IO Register
2490Q–AVR–06/10
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’s output can be set to trigger
the Timer/Counter1 Input Capture function. In addition, the comparator can trigger a separate
interrupt, exclusive to the Analog Comparator. The user can select Interrupt triggering on com-
parator output rise, fall or toggle. A block diagram of the comparator and its surrounding logic is
shown in
Figure 107. Analog Comparator Block Diagram
Notes:
• Bit 3 – ACME: Analog Comparator Multiplexer Enable
When this bit is written logic one and the ADC is switched off (ADEN in ADCSRA is zero), the
ADC multiplexer selects the negative input to the Analog Comparator. When this bit is written
logic zero, AIN1 is applied to the negative input of the Analog Comparator. For a detailed
description of this bit, see
Bit
0x20
(0x40)
Read/Write
Initial Value
ADC MULTIPLEXER
1. See
2. Refer to
REFERENCE
Figure
ACME
ADEN
OUTPUT
BANDGAP
TSM
R/W
7
0
Table 94 on page
107.
1)
ACBG
Figure 1 on page 2
R
6
–
0
“Analog Comparator Multiplexed Input” on page
229.
R
5
–
0
and
Table 30 on page 74
R
4
–
0
(1)(2)
ACME
R/W
3
0
PUD
R/W
2
0
for Analog Comparator pin placement.
PSR2
R/W
1
0
ATmega64(L)
PSR10
R/W
0
0
229.
SFIOR
227