ATMEGA645-16AI Atmel, ATMEGA645-16AI Datasheet - Page 330

• Manufacturer Part Number: ATMEGA645-16AI
• Description: IC AVR MCU FLASH 64K 5V 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645-16AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• 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): 2.7 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

2570M–AVR–04/11
Figure 28-47. Calibrated 8MHz RC Oscillator Frequency vs. V
Figure 28-48. Calibrated 8MHz RC Oscillator Frequency vs. Osccal Value
8.6
8.4
8.2
7.8
7.6
7.4
7.2
16
14
12
10
8
8
6
4
1.5
0
16
32
2
48
2.5
64
80
96
3
OSCCAL VALUE
112 128 144 160 176 192 208 224 240 256
V
CC
3.5
(V)
ATmega325/3250/645/6450
4
4.5
CC
5
CC
5.5
-40 °C
-40 °C
85 °C
25 °C
85 °C
25 °C
330