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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  
6.9 TC0 INTERRUPT OPERATION  
When the TC0C counter overflows, the TC0IRQ will be set to “1” no matter the TC0IEN is enable or disable. If the  
TC0IEN and the trigger event TC0IRQ is set to be “1”. As the result, the system will execute the interrupt vector. If the  
TC0IEN = 0, the trigger event TC0IRQ is still set to be “1”. Moreover, the system won’t execute interrupt vector even  
when the TC0IEN is set to be “1”. Users need to be cautious with the operation under multi-interrupt situation.  
¾
Example: TC0 interrupt request setup.  
B0BCLR  
B0BCLR  
MOV  
B0MOV  
MOV  
FTC0IEN  
FTC0ENB  
A, #20H  
TC0M, A  
A, #74H  
TC0C, A  
; Disable TC0 interrupt service  
; Disable TC0 timer  
;
; Set TC0 clock = Fcpu / 64  
; Set TC0C initial value = 74H  
; Set TC0 interval = 10 ms  
B0MOV  
B0BSET  
B0BCLR  
B0BSET  
FTC0IEN  
FTC0IRQ  
FTC0ENB  
; Enable TC0 interrupt service  
; Clear TC0 interrupt request flag  
; Enable TC0 timer  
B0BSET  
FGIE  
; Enable GIE  
¾
Example: TC0 interrupt service routine.  
ORG  
JMP  
8
; Interrupt vector  
INT_SERVICE  
INT_SERVICE:  
; Push routine to save ACC and PFLAG to buffers.  
B0BTS1  
JMP  
FTC0IRQ  
EXIT_INT  
; Check TC0IRQ  
; TC0IRQ = 0, exit interrupt vector  
B0BCLR  
MOV  
B0MOV  
FTC0IRQ  
A, #74H  
TC0C, A  
; Reset TC0IRQ  
; Reset TC0C.  
; TC0 interrupt service routine  
EXIT_INT:  
; Pop routine to load ACC and PFLAG from buffers.  
; Exit interrupt vector  
RETI  
SONiX TECHNOLOGY CO., LTD  
Page 64  
Version 1.1  
 
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