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STC12LE5616AD Datasheet(PDF) 54 Page - STCmicro Technology Co,.Ltd |
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STC12LE5616AD Datasheet(HTML) 54 Page - STCmicro Technology Co,.Ltd |
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54 / 377 page  STC MCU Limited. The following example is a assembly language program that demostrates STC 1T Series MCU WDT. ;/*-------------------------------------------------------------------------------*/ ;/* --- STC MCU International Limited ----------------------------------*/ ;/* --- STC 1T Series MCU WDT Demo ---------------------------------*/ ;/* If you want to use the program or the program referenced in the */ ;/* article, please specify in which data and procedures from STC */ ;/*-------------------------------------------------------------------------------*/ ; WDT overflow time = (12 × Pre-scale × 32768) / SYSclk WDT_CONTR EQU 0E1H ;WDT address WDT_TIME_LED EQU P1.5 ;WDT overflow time LED on P1.5 ;The WDT overflow time may be measured by the LED light time WDT_FLAG_LED EQU P1.7 ;WDT overflow reset flag LED indicator on P1.7 Last_WDT_Time_LED_Status EQU 00H ;bit variable used to save the last stauts of WDT overflow time LED indicator ;WDT reset time , the SYSclk is 18.432MHz ;Pre_scale_Word EQU 00111100 B ;open WDT, Pre-scale value is 32, WDT overflow time=0.68S ;Pre_scale_Word EQU 00111101 B ;open WDT, Pre-scale value is 64, WDT overflow time=1.36S ;Pre_scale_Word EQU 00111110 B ;open WDT, Pre-scale value is 128, WDT overflow time=2.72S ;Pre_scale_Word EQU 00111111 B ;open WDT, Pre-scale value is 256, WDT overflow time=5.44S ORG 0000H AJMP MAIN ORG 0100H MAIN: MOV A, WDT_CONTR ;detection if WDT reset ANL A, #10000000B JNZ WDT_Reset ;WDT_CONTR.7=1, WDT reset, jump WDT reset subroutine ;WDT_CONTR.7=0, Power-On reset, cold start-up, the content of RAM is random SETB Last_WDT_Time_LED_Status ;Power-On reset CLR WDT_TIME_LED ;Power-On reset,open WDT overflow time LED MOV WDT_CONTR, #Pre_scale_Word ;open WDT 54 |
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