NEC V850ES/F 3-L Series User Manual page 264

Chapter 7
Table 7-2
Function
Block erasure The contents of specified memory blocks are erased.
Multiple block The contents of the specified successive multiple
erasure blocks are erased.
Chip erasure The contents of the entire memory area is erased all
at once. The extra area - except the boot block
cluster protection flag - is also erased.
Write Writing to specified addresses, and a verify check to
see if write level is secured are performed.
Verify Data read from the flash memory is compared with
data transferred from the flash programmer.
Checksum Microcontroller internally calculated checksum over
the entire flash memory content is compared with the
checksum calculated by the serial programmer
Blank check The erasure status of the entire memory is checked.
Protection Following functions can be prohibited:
settings
• chip erase
• block erase
• write
• read
• rewriting of the boot block cluster
a)
In self-programming mode all blocks can be specified to be erased at once by block erasure. Note that the extra
area is not erased in this case.
b)
Can be carried out by the user's program.
c)
Except protection against rewriting of the boot block cluster all other protections have no effect in self-program-
ming mode.
Protection settings can be activated in self-programming mode. Already activate protection settings can not be
deactivated.
Table 7-3
Function Functional outline
Chip erase Erasure of the entire flash (including the extra
command prohibit area
Block erase Erasure of single blocks impossible.
command prohibit
Program command Erasure and rewrite of single blocks
prohibit impossible.
Read command Read-out of any flash content impossible.
prohibit
Rewriting boot area Erasure (by block or chip erase) or writing of
prohibit the boot block cluster impossible.
264
Basic functions for flash memory modifications
Functional outline
The following table lists the available flash memory protection functions.
For details refer to "Data Protection and Security" on page 289.
Protection functions
a
) or single blocks impossible.
User's Manual U18743EE1V2UM00
Flash Memory
Support
(√: Supported, ×: Not supported)
Serial
Self-programming
programming
√
√
√
√
√
√
√
√
Applicable
(√: applies, ×: doesn't apply)
Serial
Self-programming
programming
√
√
√
√
√
√
√
a
x
√
b
x
x
√
√ c
×
×
×
×
√