參數(shù)資料
型號： AT32UC3A0512
廠商： Atmel Corp.
英文描述： AVR32 32-Bit Microcontroller
中文描述： AVR32 32位微控制器
文件頁數(shù)： 20/109頁
文件大?。?/td> 10824K
代理商： AT32UC3A0512
23
AT32UC3A
Figure 9-2.
The AVR32UC Pipeline
9.2.2
AVR32A Microarchitecture Compliance
AVR32UC implements an AVR32A microarchitecture. The AVR32A microarchitecture is tar-
geted at cost-sensitive, lower-end applications like smaller microcontrollers. This
microarchitecture does not provide dedicated hardware registers for shadowing of register file
registers in interrupt contexts. Additionally, it does not provide hardware registers for the return
address registers and return status registers. Instead, all this information is stored on the system
stack. This saves chip area at the expense of slower interrupt handling.
Upon interrupt initiation, registers R8-R12 are automatically pushed to the system stack. These
registers are pushed regardless of the priority level of the pending interrupt. The return address
and status register are also automatically pushed to stack. The interrupt handler can therefore
use R8-R12 freely. Upon interrupt completion, the old R8-R12 registers and status register are
restored, and execution continues at the return address stored popped from stack.
The stack is also used to store the status register and return address for exceptions and scall.
Executing the rete or rets instruction at the completion of an exception or system call will pop
this status register and continue execution at the popped return address.
9.2.3
Java Support
AVR32UC does not provide Java hardware acceleration.
9.2.4
Memory protection
The MPU allows the user to check all memory accesses for privilege violations. If an access is
attempted to an illegal memory address, the access is aborted and an exception is taken. The
MPU in AVR32UC is specified in the AVR32UC Technical Reference manual.
9.2.5
Unaligned reference handling
AVR32UC does not support unaligned accesses, except for doubleword accesses. AVR32UC is
able to perform word-aligned st.d and ld.d. Any other unaligned memory access will cause an
address exception. Doubleword-sized accesses with word-aligned pointers will automatically be
performed as two word-sized accesses.
IF
ID
ALU
MUL
Regfile
w rite
Prefetch unit
Decode unit
ALU unit
Multiply unit
Load-store
unit
LS
Regfile
Read
32058K
AVR32-01/12
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AT32UC3A0512-ALTR 功能描述:MCU AVR32 512K FLASH 144LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:AVR®32 UC3 A0 標(biāo)準(zhǔn)包裝:1,500 系列:AVR® ATtiny 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C，LIN，SPI，UART/USART，USI 外圍設(shè)備:欠壓檢測/復(fù)位，POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):16 程序存儲器容量:8KB（4K x 16） 程序存儲器類型:閃存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 11x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:帶卷 (TR)
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