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參數(shù)資料
| 型號(hào)： | AT90USB647-AU |
| 廠商： | Atmel |
| 文件頁數(shù)： | 47/106頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AVR MCU 64K 64TQFP |
| 產(chǎn)品培訓(xùn)模塊： | megaAVR Introduction |
| 標(biāo)準(zhǔn)包裝： | 450 |
| 系列： | AVR® |
| 應(yīng)用： | USB 微控制器 |
| 核心處理器： | AVR |
| 程序存儲(chǔ)器類型： | 閃存（64 kB） |
| 控制器系列： | AT90 USB |
| RAM 容量： | 4K x 8 |
| 接口： | 2 線串行，SPI 串行，USART，USB |
| 輸入/輸出數(shù)： | 48 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-TQFP，64-VQFP |
| 包裝： | 托盤 |
| 供應(yīng)商設(shè)備封裝： | 64-TQFP |
| 配用： | ATSTK600-RC17-ND - STK600 ROUTING CARD AVR ATSTK525-ND - KIT STARTER FOR AT90USB AT90USBKEY2-ND - KIT DEMO FOR AT90USB |
| 其它名稱： | AT90USB647-16AU AT90USB647-16AU-ND |
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45
7593L–AVR–09/12
AT90USB64/128
Note:
1. These options should only be used if frequency stability at start-up is not important for the
application.
7.5
Calibrated internal RC oscillator
The calibrated internal RC oscillator by default provides a 8.0MHz clock. The frequency is nomi-
nal value at 3V and 25
°C. The device is shipped with the CKDIV8 Fuse programmed. See
“System clock prescaler” on page 47 for more details. This clock may be selected as the system
clock by programming the CKSEL Fuses as shown in Table 7-7. 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 3V and 25
°C, this calibration
gives a frequency of 8MHz ±10%. The oscillator can be calibrated to any frequency in the range
7.3 - 8.1MHz within ±10% 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 Section
Notes:
1. The device is shipped with this option selected.
2. The frequency ranges are preliminary values. Actual values are TBD.
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.
7.5.1
OSCCAL – Oscillator Calibration Register
Bits 7..0 – CAL7..0: Oscillator calibration value
The Oscillator Calibration Register is used to trim the calibrated internal RC oscillator to remove
process variations from the oscillator frequency. The factory-calibrated value is automatically
written to this register during chip reset, giving an oscillator frequency of 8.0MHz at 25°C. The
application software can write this register to change the oscillator frequency. The oscillator can
Table 7-7.
Internal calibrated RC oscillator operating modes
Frequency range (2) [MHz]
CKSEL3..0
7.3 - 8.1
0010
Table 7-8.
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
6CK
14CK
00
Fast rising power
6CK
14CK + 4.1ms
01
Slowly rising power
6CK
14CK + 65ms (1)
10
Reserved
11
Bit
7654
3
2
1
0
CAL7
CAL6
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
OSCCAL
Read/write
R/W
Initial value
Device specific calibration value
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AT90USB647-AUR | 功能描述:8位微控制器 -MCU 64K Flash; 2K EEPROM 4K SRAM; 48 IO Pins RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| AT90USB647-MU | 功能描述:8位微控制器 -MCU AVR USB 64K FLSH-OTG 16MHz Ind Temp RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| AT90USB647-MUR | 功能描述:8位微控制器 -MCU USB 64K FLASH 16 MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| AT90USB64X | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:USB DFU Bootloader |
| AT90USB82 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 8/16K Bytes of ISP Flash and USB Controller |
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