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SN8F2250B 参数 Datasheet PDF下载

SN8F2250B图片预览
型号: SN8F2250B
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-Bit Micro-Controller]
分类和应用: 微控制器
文件页数/大小: 133 页 / 1554 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN8F2250B Series  
USB 2.0 Full-Speed 8-Bit Micro-Controller  
6.11 USB INTERRUPT OPERATION  
When the USB process finished, the USBIRQ will be set to “1” no matter the USBIEN is enable or disable. If the  
USBIEN and the trigger event USBIRQ is set to be “1”. As the result, the system will execute the interrupt vector. If  
the USBIEN = 0, the trigger event USBIRQ is still set to be “1”. Moreover, the system won’t execute interrupt vector.  
Users need to be cautious with the operation under multi-interrupt situation.  
¾
Example: USB interrupt request setup.  
B0BCLR  
B0BCLR  
B0BSET  
FUSBIEN  
FUSBIRQ  
FUSBIEN  
; Disable USB interrupt service  
; Clear USB interrupt request flag  
; Enable USB interrupt service  
; USB initializes.  
; USB operation.  
B0BSET  
FGIE  
; Enable GIE  
Example: USB interrupt service routine.  
ORG  
JMP  
8
; Interrupt vector  
INT_SERVICE  
INT_SERVICE:  
PUSH  
; Push routine to save ACC and PFLAG to buffers.  
B0BTS1  
JMP  
FUSBIRQ  
EXIT_INT  
; Check USBIRQ  
; USBIRQ = 0, exit interrupt vector  
B0BCLR  
FUSBIRQ  
; Reset USBIRQ  
; USB interrupt service routine  
EXIT_INT:  
POP  
RETI  
; Pop routine to load ACC and PFLAG from buffers.  
; Exit interrupt vector  
SONiX TECHNOLOGY CO., LTD  
Page 66  
Version 1.1