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參數(shù)資料
| 型號： | AT32UC3A4256-C1UT |
| 廠商： | Atmel |
| 文件頁數(shù)： | 33/94頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU 256K FLASH 100VFBGA |
| 產(chǎn)品培訓模塊： | AVR® UC3 Introduction |
| 標準包裝： | 1,300 |
| 系列： | AVR®32 UC3 A4 |
| 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 |
| 外圍設備： | 欠壓檢測/復位，DMA，POR，WDT |
| 輸入/輸出數(shù)： | 88 |
| 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)轉換器： | A/D 8x10b |
| 振蕩器型： | 內部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 100-VFBGA |
| 包裝： | 托盤 |
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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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| AT32UC3A4256HHB-C1UR | 功能描述:EDBG - EDBG 制造商:atmel 系列:* 零件狀態(tài):有效 標準包裝:4,000 |
| AT32UC3A4256S | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:32-bit AVR? Microcontroller |
| AT32UC3A4256S-C1UR | 功能描述:32位微控制器 - MCU 256k flash 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 安裝風格:SMD/SMT |
| AT32UC3A4256S-C1UT | 功能描述:32位微控制器 - MCU 256k flash 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 安裝風格:SMD/SMT |
| AT32UC3A464 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:32-bit AVR? Microcontroller |
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