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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  
6.7 T0 INTERRUPT OPERATION  
When the T0C counter occurs overflow, the T0IRQ will be set to “1” however the T0IEN is enable or disable. If the  
T0IEN = 1, the trigger event will make the T0IRQ to be “1” and the system enter interrupt vector. If the T0IEN = 0, the  
trigger event will make the T0IRQ to be “1” but the system will not enter interrupt vector. Users need to care for the  
operation under multi-interrupt situation.  
¾
Example: T0 interrupt request setup.  
B0BCLR  
B0BCLR  
MOV  
B0MOV  
MOV  
FT0IEN  
FT0ENB  
A, #20H  
T0M, A  
A, #74H  
T0C, A  
; Disable T0 interrupt service  
; Disable T0 timer  
;
; Set T0 clock = Fcpu / 64  
; Set T0C initial value = 74H  
; Set T0 interval = 10 ms  
B0MOV  
B0BSET  
B0BCLR  
B0BSET  
FT0IEN  
FT0IRQ  
FT0ENB  
; Enable T0 interrupt service  
; Clear T0 interrupt request flag  
; Enable T0 timer  
B0BSET  
FGIE  
; Enable GIE  
Example: T0 interrupt service routine.  
ORG  
JMP  
8
; Interrupt vector  
INT_SERVICE  
INT_SERVICE:  
; Push routine to save ACC and PFLAG to buffers.  
B0BTS1  
JMP  
FT0IRQ  
EXIT_INT  
; Check T0IRQ  
; T0IRQ = 0, exit interrupt vector  
B0BCLR  
MOV  
B0MOV  
FT0IRQ  
A, #74H  
T0C, A  
; Reset T0IRQ  
; Reset T0C.  
; T0 interrupt service routine  
EXIT_INT:  
; Pop routine to load ACC and PFLAG from buffers.  
; Exit interrupt vector  
RETI  
SONiX TECHNOLOGY CO., LTD  
Page 62  
Version 1.1