| 전자부품 데이터시트 검색엔진 |
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M16C/26 데이터시트(PDF) 197 Page - Renesas Technology Corp |
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M16C/26 데이터시트(HTML) 197 Page - Renesas Technology Corp |
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197 / 239 page ![]() CPU Rewrite Mode (Flash Memory Version) 191 Renesas Technology Corp. M16C/26 Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Under development Preliminary Specifications Rev. 0.9 Specifications in this manual are tentative and subject to change. Flash memory control register 1 (FMR1): Bit 1 allows the user to enter EW1 mode. This bit is relevant only if bit FMR01 is set. Bit 7, when set to "0", inserts one wait state per access to Block A or B - regardless of the value of PM17. Wait state insertion during access to all other blocks, as well as to internal RAM, is controlled by PM17 - regardless of the setting of FMR17. In cases where E/W cycles to Block A or B exceed 100 times (D7, D9, U7, U9), please set FMR17 to "1" (with wait). Flash memory control register 4 (FMR4): Bit 0 must be set to enable the erase-suspend feature. Bit 1 is to be used to request a suspend of an erase operation. This bit is set automatically in EW1 by a maskable interrupt, and by software in EW0. This bit is to be always cleared by software at the end of the erase suspend. Bit 6 indicates suspend status. Poll this bit in EW0 after requesting a suspend, before accessing the flash. |
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