参数资料
型号: ATMEGA329V-8MUR
厂商: Atmel
文件页数: 55/146页
文件大小: 0K
描述: MCU AVR 32K FLASH 8MHZ 64QFN
产品培训模块: megaAVR Introduction
标准包装: 4,000
系列: AVR® ATmega
核心处理器: AVR
芯体尺寸: 8-位
速度: 8MHz
连通性: SPI,UART/USART,USI
外围设备: 欠压检测/复位,LCD,POR,PWM,WDT
输入/输出数: 54
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-VFQFN 裸露焊盘
包装: 带卷 (TR)
其它名称: ATMEGA329V-8MUR-ND
ATMEGA329V-8MURTR
30
2552K–AVR–04/11
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 30. If selected, it will operate with no external components. During reset,
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
By changing the OSCCAL register from SW, see “OSCCAL – Oscillator Calibration Register” on
page 32, it is possible to get a higher calibration accuracy than by using the factory calibration.
The accuracy of this calibration is shown as User calibration in Table 28-2 on page 329.
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 “Calibration Byte” on page 296.
Note:
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
CC), the CKDIV8
Fuse can be programmed in order to divide the internal frequency by 8.
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Note:
1. The device is shipped with this option selected
.
Table 8-7.
Internal Calibrated RC Oscillator Operating Modes
Frequency Range(2) (MHz)
CKSEL3..0
7.3 - 8.1
0010
Table 8-8.
Start-up times for the internal calibrated RC Oscillator clock selection
Power Conditions
Start-up Time from Power-
down and Power-save
Additional Delay from
Reset (VCC = 5.0V)
SUT1..0
BOD enabled
6 CK
14CK
00
Fast rising power
6 CK
14CK + 4.1ms
01
Slowly rising power
6 CK
14CK + 65ms(1)
10
Reserved
11
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