參數(shù)資料
型號(hào): AT90USB647-MU
廠商: Atmel
文件頁數(shù): 18/106頁
文件大?。?/td> 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(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-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
19
7593L–AVR–09/12
AT90USB64/128
5.8.1
Interrupt response time
The interrupt execution response for all the enabled AVR interrupts is five clock cycles minimum.
After five clock cycles the program vector address for the actual interrupt handling routine is exe-
cuted. During these five clock cycle period, the Program Counter is pushed onto the Stack. The
vector is normally a jump to the interrupt routine, and this jump takes three clock cycles. If an
interrupt occurs during execution of a multi-cycle instruction, this instruction is completed before
the interrupt is served. If an interrupt occurs when the MCU is in sleep mode, the interrupt exe-
cution response time is increased by five clock cycles. This increase comes in addition to the
start-up time from the selected sleep mode.
A return from an interrupt handling routine takes five clock cycles. During these five clock cycles,
the Program Counter (two bytes) is popped back from the Stack, the Stack Pointer is incre-
mented by two, and the I-bit in SREG is set.
Assembly code example
sei
; set Global Interrupt Enable
sleep
; enter sleep, waiting for interrupt
; note: will enter sleep before any pending
; interrupt(s)
C code example
__enable_interrupt(); /* set Global Interrupt Enable */
__sleep(); /* enter sleep, waiting for interrupt */
/* note: will enter sleep before any pending interrupt(s) */
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