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90USB1287-16AU 参数 Datasheet PDF下载

90USB1287-16AU图片预览
型号: 90USB1287-16AU
PDF下载: 下载PDF文件 查看货源
内容描述: 单片机具有ISP功能的Flash和USB控制器64 / 128K字节 [Microcontroller with 64/128K Bytes of ISP Flash and USB Controller]
分类和应用: 微控制器
文件页数/大小: 434 页 / 3172 K
品牌: ATMEL [ ATMEL ]
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The IVCE bit must be written to logic one to enable change of the IVSEL bit. IVCE is cleared by  
hardware four cycles after it is written or when IVSEL is written. Setting the IVCE bit will disable  
interrupts, as explained in the IVSEL description above. See Code Example below.  
Assembly Code Example  
Move_interrupts:  
; Enable change of Interrupt Vectors  
ldi r16, (1<<IVCE)  
out MCUCR, r16  
; Move interrupts to Boot Flash section  
ldi r16, (1<<IVSEL)  
out MCUCR, r16  
ret  
C Code Example  
void Move_interrupts(void)  
{
/* Enable change of Interrupt Vectors */  
MCUCR = (1<<IVCE);  
/* Move interrupts to Boot Flash section */  
MCUCR = (1<<IVSEL);  
}
72  
AT90USB64/128  
7593A–AVR–02/06  
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