ATMEGA6490-16AI Atmel, ATMEGA6490-16AI Datasheet - Page 30

• Manufacturer Part Number: ATMEGA6490-16AI
• Description: IC AVR MCU FLASH 64K 5V 100TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA6490-16AI

• 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: 68
• 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: 100-TQFP, 100-VQFP
• For Use With: ATSTK600-TQFP100 - STK600 SOCKET/ADAPTER 100-TQFPATSTK504 - STARTER KIT AVR EXP MOD 100P LCD
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

30
ATmega329/3290/649/6490
This clock may be selected as the system clock by programming the CKSEL Fuses as shown in
Table 8-7 on page
hardware loads the pre-programmed calibration value into the OSCCAL Register and thereby
automatically calibrates the RC Oscillator. The accuracy of this calibration is shown as Factory
calibration in
By changing the OSCCAL register from SW, see
page
The accuracy of this calibration is shown as User calibration in
When this Oscillator is used as the chip clock, the Watchdog Oscillator will still be used for the
Watchdog Timer and for the Reset Time-out. For more information on the pre-programmed cali-
bration value, see the section
Table 8-7.
Note:
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table 8-8 on page
Table 8-8.
Note:
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
32, it is possible to get a higher calibration accuracy than by using the factory calibration.
1. The device is shipped with this option selected.
2. The frequency ranges are preliminary values.
3. If 8MHz frequency exceeds the specification of the device (depends on V
1. The device is shipped with this option selected
Fuse can be programmed in order to divide the internal frequency by 8.
Table 28-2 on page
Frequency Range
Internal Calibrated RC Oscillator Operating Modes
Start-up times for the internal calibrated RC Oscillator clock selection
30.
30. If selected, it will operate with no external components. During reset,
7.3 - 8.1
Start-up Time from Power-
down and Power-save
“Calibration Byte” on page
(2)
329.
(MHz)
Reserved
6 CK
6 CK
6 CK
“OSCCAL – Oscillator Calibration Register” on
.
Additional Delay from
Reset (V
296.
14CK + 65ms
14CK + 4.1ms
14CK
Table 28-2 on page
CC
(1)(3)
CKSEL3..0
= 5.0V)
0010
(1)
CC
SUT1..0
), the CKDIV8
00
01
10
11
2552K–AVR–04/11
329.