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參數(shù)資料
| 型號： | AT90USB647-MU |
| 廠商： | Atmel |
| 文件頁數(shù)： | 54/106頁 |
| 文件大小： | 0K |
| 描述： | IC AVR MCU 64K 64QFN |
| 產(chǎn)品培訓(xùn)模塊： | megaAVR Introduction |
| 標(biāo)準(zhǔn)包裝： | 1,300 |
| 系列： | AVR® |
| 應(yīng)用： | USB 微控制器 |
| 核心處理器： | AVR |
| 程序存儲器類型： | 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-VFQFN 裸露焊盤 |
| 包裝： | 托盤 |
| 供應(yīng)商設(shè)備封裝： | 64-VQFN（9x9） |
| 配用： | ATSTK600-TQFP64-ND - STK600 SOCKET/ADAPTER 64-TQFP ATSTK525-ND - KIT STARTER FOR AT90USB AT90USBKEY2-ND - KIT DEMO FOR AT90USB |
| 其它名稱： | AT90USB647-16MU AT90USB647-16MU-ND Q4939729A |
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51
7593L–AVR–09/12
AT90USB64/128
8.
Power management and sleep modes
Sleep modes enable the application to shut down unused modules in the MCU, thereby saving
power. The AVR provides various sleep modes allowing the user to tailor the power consump-
tion to the application’s requirements.
To enter any of the five sleep modes, the SE bit in SMCR must be written to logic one and a
SLEEP instruction must be executed. The SM2, SM1, and SM0 bits in the SMCR Register select
which sleep mode (Idle, ADC Noise Reduction, Power-down, Power-save, or Standby) will be
activated by the SLEEP instruction. See Table 8-1 for a summary. If an enabled interrupt occurs
while the MCU is in a sleep mode, the MCU wakes up. The MCU is then halted for four cycles in
addition to the start-up time, executes the interrupt routine, and resumes execution from the
instruction following SLEEP. The contents of the Register File and SRAM are unaltered when
the device wakes up from sleep. If a reset occurs during sleep mode, the MCU wakes up and
executes from the Reset Vector.
Figure 7-1 on page 40 presents the different clock systems in the Atmel AT90USB64/128, and
their distribution. The figure is helpful in selecting an appropriate sleep mode.
8.0.1
SMCR – Sleep Mode Control Register
The Sleep Mode Control Register contains control bits for power management.
Bits 3, 2, 1 – SM2..0: Sleep Mode Select Bits 2, 1, and 0
These bits select between the six available sleep modes as shown in Table 8-1.
Note:
1. Standby modes are only recommended for use with external crystals or resonators.
Bit 1 – SE: Sleep Enable
The SE bit must be written to logic one to make the MCU enter the sleep mode when the SLEEP
instruction is executed. To avoid the MCU entering the sleep mode unless it is the programmer’s
purpose, it is recommended to write the Sleep Enable (SE) bit to one just before the execution of
the SLEEP instruction and to clear it immediately after waking up.
Bit
7654
32
10
––––
SM2
SM1
SM0
SE
SMCR
Read/write
RRRR
R/W
Initial value
0000
00
Table 8-1.
Sleep mode select.
SM2
SM1
SM0
Sleep mode
000
Idle
0
1
ADC noise reduction
010
Power-down
011
Power-save
100
Reserved
101
Reserved
110
Standby (1)
1
Extended Standby (1)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| AT90USB82_0811 | 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 |
| AT90USB82-16MU | 功能描述:8位微控制器 -MCU AVR USB 8K FLASH 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 |
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