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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  
6.8 T1 INTERRUPT OPERATION  
When the T1C counter overflows, the T1IRQ will be set to “1” no matter the T1IEN is enable or disable. If the T1IEN  
and the trigger event T1IRQ is set to be “1”. As the result, the system will execute the interrupt vector. If the T1IEN =  
0, the trigger event T1IRQ is still set to be “1”. Moreover, the system won’t execute interrupt vector even when the  
T1IEN is set to be “1”. Users need to be cautious with the operation under multi-interrupt situation.  
¾
Example: T1 interrupt request setup.  
B0BCLR  
B0BCLR  
MOV  
B0MOV  
MOV  
B0MOV  
MOV  
B0MOV  
FT1IEN  
; Disable T1 interrupt service  
; Disable T1 timer  
;
; Set T1 clock = Fcpu / 256  
; Set T1C_L initial value = E5H  
FT1ENB  
A, #00H  
T1M, A  
A, #0E5H  
T1C_L, A  
A, #48H  
T1C_H, A  
; Set T1C_H initial value = 48H  
; Set T1 interval = 1s  
B0BSET  
B0BCLR  
B0BSET  
FT1IEN  
FT1IRQ  
FT1ENB  
; Enable T1 interrupt service  
; Clear T1 interrupt request flag  
; Enable T1 timer  
B0BSET  
FGIE  
; Enable GIE  
Example: T1 interrupt service routine.  
ORG  
JMP  
8
; Interrupt vector  
INT_SERVICE  
INT_SERVICE:  
; Push routine to save ACC and PFLAG to buffers.  
B0BTS1  
JMP  
FT1IRQ  
EXIT_INT  
; Check T1IRQ  
; T1IRQ = 0, exit interrupt vector  
B0BCLR  
MOV  
B0MOV  
MOV  
FT1IRQ  
; Reset T1IRQ  
; Reset T1C_L.  
A, #0E5H  
T1C_L, A  
A, #48H  
B0MOV  
T1C_H, A  
; Reset T1C_H.  
; T1 interrupt service routine  
EXIT_INT:  
; Pop routine to load ACC and PFLAG from buffers.  
; Exit interrupt vector  
RETI  
SONiX TECHNOLOGY CO., LTD  
Page 63  
Version 1.1