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PIC12F1501T-EPQTP Datasheet(PDF) 91 Page - Microchip Technology |
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PIC12F1501T-EPQTP Datasheet(HTML) 91 Page - Microchip Technology |
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91 / 278 page  2011 Microchip Technology Inc. Preliminary DS41615A-page 91 PIC12(L)F1501 FIGURE 10-6: FLASH PROGRAM MEMORY WRITE FLOWCHART Disable Interrupts (GIE = 0) Start Write Operation Select Program or Config. Memory (CFGS) Select Row Address (PMADRH:PMADRL) Select Write Operation (FREE = 0) Enable Write/Erase Operation (WREN = 1) Unlock Sequence (Figure x-x) Disable Write/Erase Operation (WREN = 0) Re-enable Interrupts (GIE = 1) End Write Operation No delay when writing to Program Memory Latches Determine number of words to be written into Program or Configuration Memory. The number of words cannot exceed the number of words per row. (word_cnt) Load the value to write (PMDATH:PMDATL) Update the word counter (word_cnt--) Last word to write ? Increment Address (PMADRH:PMADRL++) Unlock Sequence (Figure x-x) CPU stalls while Write operation completes (2ms typical) Load Write Latches Only (LWLO = 1) Write Latches to Flash (LWLO = 0) No Yes Figure 10-3 Figure 10-3 |
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