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| 型号： | AT90USB82-16MUR |
| 厂商： | Atmel |
| 文件页数： | 26/38页 |
| 文件大小： | 0K |
| 描述： | MCU AVR USB 8K FLASH 32-QFN |
| 产品培训模块： | MCU Product Line Introduction megaAVR Introduction |
| 标准包装： | 5,000 |
| 系列： | AVR® 90USB |
| 核心处理器： | AVR |
| 芯体尺寸： | 8-位 |
| 速度： | 16MHz |
| 连通性： | EBI/EMI，PS/2，SPI，UART/USART，USB |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 22 |
| 程序存储器容量： | 8KB（8K x 8） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 512 x 8 |
| RAM 容量： | 512 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 配用： | ATSTK600-ND - DEV KIT FOR AVR/AVR32 ATSTK526-ND - KIT STARTER FOR AT90USB82/162 ATAVRDRAGON-ND - KIT DRAGON FLASH MEM AVR ATSTK525-ND - KIT STARTER FOR AT90USB AT90USBKEY2-ND - KIT DEMO FOR AT90USB |
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32
7707F–AVR–11/10
AT90USB82/162
Notes:
1. These options should only be used when not operating close to the maximum frequency of the
device, and only if frequency stability at start-up is not important for the application. These
options are not suitable for crystals.
2. These options are intended for use with ceramic resonators and will ensure frequency stability
at start-up. They can also be used with crystals when not operating close to the maximum fre-
quency of the device, and if frequency stability at start-up is not important for the application.
Note:
1.
The device is shipped with this option selected.
6.5
Calibrated Internal RC Oscillator
The calibrated internal RC Oscillator by default provides a 8.0 MHz clock. The fre-
quency is nominal value at 3.0V and 25°C. At 3.0V and 25°C, this calibration gives a
frequency of 8 MHz ± 10%. The device is shipped with the CKDIV8 Fuse programmed.
See “System Clock Prescaler” on page 34 for more details. This clock may be selected
as the system clock by programming the CKSEL Fuses as shown in Table 6-6. If
selected, it will operate with no external components. During reset, hardware loads the
calibration byte into the OSCCAL Register and thereby automatically calibrates the RC
Oscillator. At 3.3V and 25
C, this calibration gives a frequency of 8 MHz ± 1%. The
oscillator can be calibrated to any frequency in the range 7.3 - 8.1 MHz within ±1%
accuracy, by changing the OSCCAL register. 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 calibration value, see the
section “Calibration Byte” on page 246
Notes:
1. The device is shipped with this option selected.
2. The frequency ranges are preliminary values. Actual values are TBD.
Crystal Oscillator, BOD
enabled
16K CK
14CK
1
01
Crystal Oscillator, fast
rising power
16K CK
14CK + 4.1 ms
1
10
Crystal Oscillator, slowly
rising power
16K CK
14CK + 65 ms
1
11
Table 6-5.
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 + 4.1 ms
01
Slowly rising power
6 CK
14CK + 65 ms(1)
10
Reserved
11
Table 6-4.
Start-up Times for the Low Power Crystal Oscillator Clock Selection (Continued)
Oscillator Source /
Power Conditions
Start-up Time from
Power-down and
Power-save
Additional Delay
from Reset
(V
CC = 5.0V)
CLKSEL
0SUT1..0
Table 6-6.
Internal Calibrated RC Oscillator Operating Modes(1)(3)
Frequency Range(2) (MHz)
CKSEL3..0
7.3 - 8.1
0010
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