509
*2 For details of FLER bit setting conditions, see section 17.3.4, Flash Memory Status
Register (FLMSR).
*3 FLMCR and EBR can be written to. However, registers will be initialized if a transition
is made to software standby mode in the error protection state.
RD VF PR ER FLER = 0
P = 1 or
E = 1
P = 0 and
E = 0
Reset or hardware standby
RD VF PR ER INIT FLER = 0
Program mode
Erase mode
RD VF PR ER FLER = 0
Memory read verify
mode
Reset or standby
(hardware protection)
RD VF PR ER FLER= 1
RD VF PR ER INIT FLER = 1
Error protection mode
Error protection mode
(software standby)
Software
standby mode
Software standby
mode release
Reset or hardware
standby or software
standby
Reset release
and hardware
standby release and
software standby release
Reset or hardware
standby
RD : Memory read possible
VF : Verify-read possible
PR : Programming possible
ER : Erasing possible
RD : Memory read not possible
VF
: Verify-read not possible
PR : Programming not possible
ER : Erasing not possible
INIT : Register (FLMCR, EBR) initialization state
Reset or hardware
standby
Error occurrence
(software standby)
Error
occurrence
Figure 17.13 Flash Memory State Transitions (Modes 5 and 7 (On-Chip ROM Enabled),
High Level Applied to FWE Pin)
The error protection function is invalid for abnormal operations other than the FLER bit setting
conditions. Also, if a certain time has elapsed before this protection state is entered, damage may
already have been caused to the flash memory. Consequently, this function cannot provide
complete protection against damage to flash memory.
Содержание H8/3060
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