ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 74

• 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

13.3.1
8284A–AVR–10/10
Alternate Functions of Port A
The Port A has an alternate function as COM0:3 and SEG0:3 for the LCD Controller.
Table 13-3.
Table 13-4
shown in
Table 13-4.
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
AIO
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
Port Pin
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Figure 13-5 on page
and
Port A Pins Alternate Functions
Overriding Signals for Alternate Functions in PA7:PA4
Table 13-5
Alternate Function
SEG (LCD Front Plane 3)
SEG (LCD Front Plane 2)
SEG (LCD Front Plane 1)
SEG (LCD Front Plane 0)
COM (LCD Back Plane 3)
COM (LCD Back Plane 2)
COM (LCD Back Plane 1)
COM (LCD Back Plane 0)
PA7/SEG3
LCDEN
0
LCDEN
0
0
0
–
LCDEN
0
–
LCDSEG
relates the alternate functions of Port A to the overriding signals
72.
PA6/SEG2
LCDEN
0
LCDEN
0
0
0
–
LCDEN
0
–
LCDSEG
PA5/SEG1
LCDEN
0
LCDEN
0
0
0
–
LCDEN
0
–
LCDSEG
PA4/SEG0
LCDEN
0
LCDEN
0
0
0
–
LCDEN
0
–
LCDSEG
74