ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 162

• Manufacturer Part Number: ATMEGA649A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• 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): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• 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

8284A–AVR–10/10
When OC2A is connected to the pin, the function of the COM2A[1:0] bits depends on the
WGM2[1:0] bit setting.
bits are set to a normal or CTC mode (non-PWM).
Table 17-3.
Table 17-4
PWM mode.
Table 17-4.
Note:
Table 17-5
rect PWM mode.
Table 17-5.
Note:
• Bit 2:0 – CS2[2:0]: Clock Select
The three Clock Select bits select the clock source to be used by the Timer/Counter, see
17-6 on page
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
COM2A1
COM2A1
COM2A1
0
0
1
1
0
0
1
1
0
0
1
1
1. A special case occurs when OCR2A equals TOP and COM2A1 is set. In this case, the com-
1. A special case occurs when OCR2A equals TOP and COM2A1 is set. In this case, the com-
shows the COM2[1:0] bit functionality when the WGM2[1:0] bits are set to phase cor-
pare match is ignored, but the set or clear is done at BOTTOM. See
page 153
pare match is ignored, but the set or clear is done at TOP. See
page 155
shows the COM2A[1:0] bit functionality when the WGM2[1:0] bits are set to fast
163.
Compare Output Mode, non-PWM Mode
Compare Output Mode, Fast PWM Mode
Compare Output Mode, Phase Correct PWM Mode
COM2A0
COM2A0
COM2A0
for more details.
for more details.
0
1
0
1
0
1
0
1
0
1
0
1
Table 17-3
Description
Normal port operation, OC2A disconnected.
Reserved
Clear OC2A on compare match, set OC2A at BOTTOM
(non-inverting mode)
Set OC2A on compare match, clear OC2A at BOTTOM
(inverting mode).
Description
Normal port operation, OC2A disconnected.
Reserved
Clear OC2A on compare match when up-counting. Set OC2A on
compare match when counting down.
Set OC2A on compare match when up-counting. Clear OC2A on
compare match when counting down.
Description
Normal port operation, OC2A disconnected.
Toggle OC2A on compare match.
Clear OC2A on compare match.
Set OC2A on compare match.
shows the COM2A1:0 bit functionality when the WGM2[1:0]
(1)
(1)
”Phase Correct PWM Mode” on
”Fast PWM Mode” on
Table
162