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R8C2K Datasheet(PDF) 401 Page - Renesas Technology Corp |
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R8C2K Datasheet(HTML) 401 Page - Renesas Technology Corp |
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401 / 471 page  R8C/2K Group, R8C/2L Group 20. Flash Memory Rev.1.10 Dec 21, 2007 Page 384 of 450 REJ09B0406-0110 20.4.4 EW1 Mode The MCU is switched to EW1 mode by setting the FMR11 bit to 1 (EW1 mode) after setting the FMR01 bit to 1 (CPU rewrite mode enabled). The FMR0 register can be used to determine when program and erase operations complete. Figure 20.17 shows the How to Set and Exit EW1 Mode. Figure 20.17 How to Set and Exit EW1 Mode Write 0 to the FMR01 bit before writing 1 (CPU rewrite mode enabled)(1) Write 0 to the FMR11 bit before writing 1 (EW1 mode) Execute software commands Write 0 to the FMR01 bit (CPU rewrite mode disabled) NOTE: 1. To set the FMR01 bit to 1, write 0 to the FMR01 bit before writing 1. Do not generate an interrupt between writing 0 and 1. EW1 Mode Operating Procedure Program in ROM |
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