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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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H8SX/1663M 데이터시트(PDF) 1201 Page - Renesas Technology Corp |
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H8SX/1663M 데이터시트(HTML) 1201 Page - Renesas Technology Corp |
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1201 / 1504 page  Section 25 Flash Memory Rev. 2.00 Sep. 24, 2008 Page 1169 of 1468 REJ09B0412-0200 Error protection is canceled by a reset. Note that the reset should be released after the reset input period of at least 100 µs has passed. Since high voltages are applied during programming/erasure of the flash memory, some voltage may remain after the error protection state has been entered. For this reason, it is necessary to reduce the risk of damaging the flash memory by extending the reset input period so that the charge is released. The state-transition diagram in figure 25.18 shows transitions to and from the error protection state. Reset (hardware protection) Programming/erasing mode Error-protection mode Error-protection mode (software standby) Read disabled Programming/erasing enabled FLER = 0 Read disabled Programming/erasing disabled FLER = 0 Read enabled Programming/erasing disabled FLER = 1 Read disabled Programming/erasing disabled FLER = 1 RES = 0 Error occurrence Error occurred (Software standby) RES = 0 Software standby mode Cancel software standby mode RES = 0 Programming/erasing interface register is in its initial state. Programming/erasing interface register is in its initial state. Figure 25.18 Transitions to Error Protection State |
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