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SMBP2501BPB Datasheet(PDF) 64 Page - SONiX Technology Company |
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SMBP2501BPB Datasheet(HTML) 64 Page - SONiX Technology Company |
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64 / 107 page  SN8P2501B 8-Bit Micro-Controller SONiX TECHNOLOGY CO., LTD Page 64 Version 2.1 6.5 PUSH, POP ROUTINE When any interrupt occurs, system will jump to ORG 8 and execute interrupt service routine. It is necessary to save ACC, PFLAG data. The chip includes “PUSH”, “POP” for in/out interrupt service routine. The two instructions save and load ACC, PFLAG data into buffers and avoid main routine error after interrupt service routine finishing. Note: ”PUSH”, “POP” instructions save and load ACC/PFLAG without (NT0, NPD). PUSH/POP buffer is an unique buffer and only one level. Example: Store ACC and PAFLG data by PUSH, POP instructions when interrupt service routine executed. ORG 0 JMP START ORG 8 JMP INT_SERVICE ORG 10H START: … INT_SERVICE: PUSH ; Save ACC and PFLAG to buffers. … … POP ; Load ACC and PFLAG from buffers. RETI ; Exit interrupt service vector … ENDP |
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