Control B
Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
BOOTLOCK | APCWP | ||||||
Access | R/W | R/W | |||||
Reset | 0 | 0 |
Boot Section Lock
Writing this bit to ‘1
’ locks the BOOT section from reading and
instruction fetching.
If this bit is ‘1
’, a read from the BOOT section will return
‘0
’. A fetch from the BOOT section will also return
‘0
’ as instruction.
This bit can be written from the BOOT section only. It can only be cleared to
‘0
’ by a Reset.
This bit will take effect only when the BOOT section is left the first time after the bit is written.
Application Code Section Write Protection
Writing this bit to ‘1
’ prevents further updates to the
Application Code section.
This bit can only be written to ‘1
’. It is cleared
to ‘0
’ only by Reset.