參數(shù)資料
型號： AT32UC3A3256AU-ALUT
廠商： Atmel
文件頁數(shù)： 33/94頁
文件大?。?/td> 0K
描述： IC MCU 256KB FLASH 144LQFP
產(chǎn)品培訓(xùn)模塊： AVR® UC3 Introduction
標準包裝： 300
系列： AVR®32 UC3 A3 Audio
核心處理器： AVR
芯體尺寸： 32-位
速度： 66MHz
連通性： EBI/EMI，I²C，IrDA，MMC，SPI，SSC，UART/USART，USB OTG
外圍設(shè)備： 欠壓檢測/復(fù)位，DMA，POR，WDT
輸入/輸出數(shù)： 110
程序存儲器容量： 256KB（256K x 8）
程序存儲器類型： 閃存
RAM 容量： 128K x 8
電壓 - 電源 (Vcc/Vdd)： 1.65 V ~ 1.95 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 144-LQFP
包裝： 托盤
39
32072SH–AVR32–10/2012
AT32UC3A3
6.
Boot Sequence
This chapter summarizes the boot sequence of the AT32UC3A3/A4. The behavior after power-
up is controlled by the Power Manager. For specific details, refer to Section 7. ”Power Manager
(PM)” on page 86.
6.1
Starting of Clocks
After power-up, the device will be held in a reset state by the Power-On Reset circuitry, until the
power has stabilized throughout the device. Once the power has stabilized, the device will use
the internal RC Oscillator as clock source.
On system start-up, the PLLs are disabled. All clocks to all modules are running. No clocks have
a divided frequency, all parts of the system receives a clock with the same frequency as the
internal RC Oscillator.
6.2
Fetching of Initial Instructions
After reset has been released, the AVR32 UC CPU starts fetching instructions from the reset
address, which is 0x8000_0000. This address points to the first address in the internal Flash.
The internal Flash uses VDDIO voltage during read and write operations. BOD33 monitors this
voltage and maintains the device under reset until VDDIO reaches the minimum voltage, pre-
venting any spurious execution from flash.
The code read from the internal Flash is free to configure the system to use for example the
PLLs, to divide the frequency of the clock routed to some of the peripherals, and to gate the
clocks to unused peripherals.
When powering up the device, there may be a delay before the voltage has stabilized, depend-
ing on the rise time of the supply used. The CPU can start executing code as soon as the supply
is above the POR threshold, and before the supply is stable. Before switching to a high-speed
clock source, the user should use the BOD to make sure the VDDCORE is above the minimum-
level (1.62V).
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AT32UC3A3256-CTUR 功能描述:32位微控制器 - MCU 256KB, 144FFBGA Ind RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
AT32UC3A3256-CTUT 功能描述:32位微控制器 - MCU 256KB, 144FFBGA Ind RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
AT32UC3A3256-CTUT SL383 制造商:Atmel Corporation 功能描述:
AT32UC3A3256-DDW 功能描述:32位微控制器 - MCU UC3A3 256Kb flash - 256Kflash UC3A - Wafer RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
AT32UC3A3256S 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:32-bit AVR? Microcontroller
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