H8SXSLASH1663R datasheet(1201/1504 Pages) RENESAS

tên linh kiện	H8SX/1663R

Giải thích chi tiết về linh kiện	Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

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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

(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

Figure 25.18 Transitions to Error Protection State

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