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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMP88CS38 датащи(PDF) 29 Page - Toshiba Semiconductor |
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TMP88CS38 датащи(HTML) 29 Page - Toshiba Semiconductor |
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29 / 226 page  TMP88CS38/CM38A/CP38A 2007-09-12 88CS38-29 3. General-purpose registers save/restore using push and pop instructions To save only a specific register, and when the same interrupt source occurs more than once, the general-purpose registers can be saved/restored using the push/pop instructions. Example: Register save/restore using push and pop instructions PINTxx: PUSH WA ; Save WA register pair Interrupt processing POP WA ; Restore WA register pair RETI ; Return Address (Example) SP 0023AH A 0023B SP W SP 0023C PCL PCL PCL 0023D PCH PCH PCH 0023E PCE PCE PCE 0023F PSWL PSWL PSWL 00240 PSWH PSWH PSWH SP 00241 At acceptance of an interrupt At execution of a push instruction At execution of a pop instruction At execution of an interrupt return instruction 4. General-purpose registers save/restore using data transfer instructions Data transfer instruction can be used to save only a specific general-purpose register during processing of single interrupt. Example: Saving/restoring a register using data transfer instructions PINTxx: LD (GSAVA), A ; Save A register Interrupt processing LD A, (GSAVA) ; Restore A register RETI ; Return |
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