ATMEGA649V-8AI Atmel, ATMEGA649V-8AI Datasheet - Page 257

• Manufacturer Part Number: ATMEGA649V-8AI
• Description: IC AVR MCU FLASH 64K 1.8V 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649V-8AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, 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): 1.8 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

25.6.2
2552K–AVR–04/11
Scanning the RESET Pin
Figure 25-4. General Port Pin Schematic Diagram
The RESET pin accepts 5V active low logic for standard reset operation, and 12V active high
logic for High Voltage Parallel programming. An observe-only cell as shown in
inserted both for the 5V reset signal; RSTT, and the 12V reset signal; RSTHV.
Figure 25-5. Observe-only Cell
See Boundary-scan
Description for Details!
Pxn
From System Pin
PUD:
PUExn:
OCxn:
ODxn:
IDxn:
SLEEP:
IDxn
PULLUP DISABLE
PULLUP ENABLE for pin Pxn
OUTPUT CONTROL for pin Pxn
OUTPUT DATA to pin Pxn
INPUT DATA from pin Pxn
SLEEP CONTROL
PUExn
Previous
From
Cell
ShiftDR
0
1
SLEEP
OCxn
ClockDR
ATmega329/3290/649/6490
ODxn
SYNCHRONIZER
WDx:
RDx:
WRx:
RRx:
RPx:
WPx:
CLK
D
L
Q
Q
D
I/O
FF1
:
Q
D
WRITE DDRx
READ DDRx
WRITE PORTx
READ PORTx REGISTER
READ PORTx PIN
WRITE PINx REGISTER
I/O CLOCK
PINxn
Next
Cell
Q
Q
To
RESET
RESET
PORTxn
Q
Q
Q
Q
DDxn
CLR
CLR
D
D
To System Logic
RRx
CLK
PUD
WDx
RDx
RPx
1
0
I/O
WPx
WRx
Figure 25-5
257
is