h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 462
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h8s-2172
Manufacturer Part Number
h8s-2172
Description
Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2172.pdf
(570 pages)
- Current page: 462 of 570
- Download datasheet (5Mb)
Error protection is cancelled only by a reset or by hardware-standby mode. Note that the reset
should be released after the reset period of 100 µs which is longer than normal. Since high
voltages are applied during programming/erasing 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 damage to the flash memory by extending the reset period so that the charge is released.
The state-transition diagram in figure 14.16 shows transitions to and from the error-protection
state.
Rev. 2.00, 03/04, page 430 of 534
Error occurrence
Programming/erasing
Programming/erasing disabled
enabled
Error protection mode
Program mode
Read disabled
Erase mode
Read enabled
FLER = 1
FLER = 0
Figure 14.16 Transitions to Error-Protection State
Software-standby mode
software-standby mode
= 0 or
Cancel
= 0
programming/erasing disabled
Error-protection mode
(Software standby)
Program/erase interface
register is in its initial state.
Programming/erasing disabled
Read disabled
= 0 or
= 0
(Hardware protection)
FLER = 1
Reset or hardware
Read disabled
FLER = 0
standby
Program/erase interface
register is in its initial state.
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