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H8SX/1663R Datasheet(PDF) 1201 Page - Renesas Technology Corp

Part # H8SX/1663R
Description  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
PDF  1504 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8SX/1663R Datasheet(HTML) 1201 Page - Renesas Technology Corp

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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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