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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HD64F2149YV 데이터시트(PDF) 720 Page - Renesas Technology Corp |
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HD64F2149YV 데이터시트(HTML) 720 Page - Renesas Technology Corp |
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720 / 1075 page  Section 22 ROM Rev. 3.00 Jan 18, 2006 page 692 of 1044 REJ09B0280-0300 22.4.3 Flash Memory Operating Modes Mode Transitions: When the mode pins are set in the reset state and a reset-start is executed, the MCU enters one of the operating modes shown in figure 22.3. In user mode, flash memory can be read but not programmed or erased. Flash memory can be programmed and erased in boot mode, user program mode, and programmer mode. Boot mode On-board programming mode User program mode User mode with on-chip ROM enabled Reset state Programmer mode RES = 0 SWE = 1 SWE = 0 *1 *2 Notes: Only make a transition between user mode and user program mode when the CPU is not accessing the flash memory. 1. MD0 = MD1 = 0, P92 = P91 = P90 = 1 2. MD0 = MD1 = 0, P92 = 0, P91 = P90 = 1 RES = 0 RES = 0 RES = 0 MD1 = 1 Figure 22.3 Flash Memory Mode Transitions |
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