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7516 データシート(PDF) 52 Page - Renesas Technology Corp |
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7516 データシート(HTML) 52 Page - Renesas Technology Corp |
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52 / 90 page  Rev.1.01 Jul 01, 2003 page 52 of 89 7516 Group Fig. 59 CPU rewrite mode set/release flowchart End Start Execute read array command or reset flash memory by setting flash memory reset bit (by writing “1” and then “0” in succession) (Note 3) Single-chip mode or Boot mode (Note 1) Set CPU mode register (Note 2) Using software command execute erase, program, or other operation Jump to control program transferred in RAM (Subsequent operations are executed by control program in this RAM) Transfer CPU rewrite mode control program to RAM Notes 1: When starting the MCU in the single-chip mode, supply 4.5 V to 5.5 V to the CNVss pin until checking the CPU rewrite mode entry flag. 2: Set bits 6, 7 (main clock division ratio selection bits) at CPU mode register (003B16). 3: Before exiting the CPU rewrite mode after completing erase or program operation, always be sure to execute the read array command or reset the flash memory. Write “0” to CPU rewrite mode select bit Set CPU rewrite mode select bit to “1” (by writing “0” and then “1” in succession) Check CPU rewrite mode entry flag Setting Released |
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