BPROT — Block protection

The mechanism for protecting non-volatile memory can be used to prevent application code from erasing or writing to protected blocks.

Non-volatile memory can be protected from erases and writes depending on the settings in the CONFIG registers. One bit in a CONFIG register represents one protected block of 4 kB. There are four CONFIG registers of 32 bits, which means there are 128 protectable blocks in total.

Important: If an erase or write to a protected block is detected, the CPU will hard fault. If an ERASEALL operation is attempted from the CPU while any block is protected, it will be blocked and the CPU will hard fault.

On reset, all the protection bits are cleared. To ensure safe operation, the first task after reset must be to set the protection bits. The only way of clearing protection bits is by resetting the device from any reset source.

The protection mechanism is turned off when in debug interface mode (a debugger is connected) and the DISABLEINDEBUG register is set to disable. For more information, see Debug and trace.

Figure 1. Protected regions of program memory

Registers

Table 1. Instances
Base address	Peripheral	Instance	Description	Configuration
0x40000000	BPROT	BPROT	Block Protect

Table 2. Register Overview
Register	Offset	Description
CONFIG0	0x600	Block protect configuration register 0
CONFIG1	0x604	Block protect configuration register 1
DISABLEINDEBUG	0x608	Disable protection mechanism in debug interface mode
	0x60C		Reserved
CONFIG2	0x610	Block protect configuration register 2
CONFIG3	0x614	Block protect configuration register 3

CONFIG0

Address offset: 0x600

Block protect configuration register 0

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id				f	e	d	c	b	a	Z	Y	X	W	V	U	T	S	R	Q	P	O	N	M	L	K	J	I	H	G	F	E	D	C	B	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Id	RW	Field	Value Id	Value								Description
A	RW	REGION0										Enable protection for region 0. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
B	RW	REGION1										Enable protection for region 1. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
C	RW	REGION2										Enable protection for region 2. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
D	RW	REGION3										Enable protection for region 3. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
E	RW	REGION4										Enable protection for region 4. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
F	RW	REGION5										Enable protection for region 5. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
G	RW	REGION6										Enable protection for region 6. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
H	RW	REGION7										Enable protection for region 7. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
I	RW	REGION8										Enable protection for region 8. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
J	RW	REGION9										Enable protection for region 9. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
K	RW	REGION10										Enable protection for region 10. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
L	RW	REGION11										Enable protection for region 11. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
M	RW	REGION12										Enable protection for region 12. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
N	RW	REGION13										Enable protection for region 13. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
O	RW	REGION14										Enable protection for region 14. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
P	RW	REGION15										Enable protection for region 15. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
Q	RW	REGION16										Enable protection for region 16. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
R	RW	REGION17										Enable protection for region 17. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
S	RW	REGION18										Enable protection for region 18. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
T	RW	REGION19										Enable protection for region 19. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
U	RW	REGION20										Enable protection for region 20. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
V	RW	REGION21										Enable protection for region 21. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
W	RW	REGION22										Enable protection for region 22. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
X	RW	REGION23										Enable protection for region 23. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
Y	RW	REGION24										Enable protection for region 24. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
Z	RW	REGION25										Enable protection for region 25. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
a	RW	REGION26										Enable protection for region 26. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
b	RW	REGION27										Enable protection for region 27. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
c	RW	REGION28										Enable protection for region 28. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
d	RW	REGION29										Enable protection for region 29. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
e	RW	REGION30										Enable protection for region 30. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable
f	RW	REGION31										Enable protection for region 31. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enable

CONFIG1

Address offset: 0x604

Block protect configuration register 1

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id				f	e	d	c	b	a	Z	Y	X	W	V	U	T	S	R	Q	P	O	N	M	L	K	J	I	H	G	F	E	D	C	B	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Id	RW	Field	Value Id	Value								Description
A	RW	REGION32										Enable protection for region 32. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
B	RW	REGION33										Enable protection for region 33. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
C	RW	REGION34										Enable protection for region 34. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
D	RW	REGION35										Enable protection for region 35. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
E	RW	REGION36										Enable protection for region 36. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
F	RW	REGION37										Enable protection for region 37. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
G	RW	REGION38										Enable protection for region 38. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
H	RW	REGION39										Enable protection for region 39. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
I	RW	REGION40										Enable protection for region 40. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
J	RW	REGION41										Enable protection for region 41. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
K	RW	REGION42										Enable protection for region 42. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
L	RW	REGION43										Enable protection for region 43. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
M	RW	REGION44										Enable protection for region 44. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
N	RW	REGION45										Enable protection for region 45. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
O	RW	REGION46										Enable protection for region 46. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
P	RW	REGION47										Enable protection for region 47. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Q	RW	REGION48										Enable protection for region 48. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
R	RW	REGION49										Enable protection for region 49. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
S	RW	REGION50										Enable protection for region 50. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
T	RW	REGION51										Enable protection for region 51. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
U	RW	REGION52										Enable protection for region 52. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
V	RW	REGION53										Enable protection for region 53. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
W	RW	REGION54										Enable protection for region 54. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
X	RW	REGION55										Enable protection for region 55. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Y	RW	REGION56										Enable protection for region 56. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Z	RW	REGION57										Enable protection for region 57. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
a	RW	REGION58										Enable protection for region 58. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
b	RW	REGION59										Enable protection for region 59. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
c	RW	REGION60										Enable protection for region 60. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
d	RW	REGION61										Enable protection for region 61. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
e	RW	REGION62										Enable protection for region 62. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
f	RW	REGION63										Enable protection for region 63. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled

DISABLEINDEBUG

Address offset: 0x608

Disable protection mechanism in debug interface mode

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id																																			A
Reset 0x00000001				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1
Id	RW	Field	Value Id	Value								Description
A	RW	DISABLEINDEBUG										Disable the protection mechanism for NVM regions while in debug interface mode. This register will only disable the protection mechanism if the device is in debug interface mode.
			Disabled	1								Disable in debug
			Enabled	0								Enable in debug

CONFIG2

Address offset: 0x610

Block protect configuration register 2

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id				f	e	d	c	b	a	Z	Y	X	W	V	U	T	S	R	Q	P	O	N	M	L	K	J	I	H	G	F	E	D	C	B	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Id	RW	Field	Value Id	Value								Description
A	RW	REGION64										Enable protection for region 64. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
B	RW	REGION65										Enable protection for region 65. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
C	RW	REGION66										Enable protection for region 66. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
D	RW	REGION67										Enable protection for region 67. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
E	RW	REGION68										Enable protection for region 68. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
F	RW	REGION69										Enable protection for region 69. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
G	RW	REGION70										Enable protection for region 70. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
H	RW	REGION71										Enable protection for region 71. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
I	RW	REGION72										Enable protection for region 72. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
J	RW	REGION73										Enable protection for region 73. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
K	RW	REGION74										Enable protection for region 74. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
L	RW	REGION75										Enable protection for region 75. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
M	RW	REGION76										Enable protection for region 76. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
N	RW	REGION77										Enable protection for region 77. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
O	RW	REGION78										Enable protection for region 78. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
P	RW	REGION79										Enable protection for region 79. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Q	RW	REGION80										Enable protection for region 80. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
R	RW	REGION81										Enable protection for region 81. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
S	RW	REGION82										Enable protection for region 82. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
T	RW	REGION83										Enable protection for region 83. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
U	RW	REGION84										Enable protection for region 84. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
V	RW	REGION85										Enable protection for region 85. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
W	RW	REGION86										Enable protection for region 86. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
X	RW	REGION87										Enable protection for region 87. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Y	RW	REGION88										Enable protection for region 88. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Z	RW	REGION89										Enable protection for region 89. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
a	RW	REGION90										Enable protection for region 90. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
b	RW	REGION91										Enable protection for region 91. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
c	RW	REGION92										Enable protection for region 92. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
d	RW	REGION93										Enable protection for region 93. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
e	RW	REGION94										Enable protection for region 94. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
f	RW	REGION95										Enable protection for region 95. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled

CONFIG3

Address offset: 0x614

Block protect configuration register 3

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Id				f	e	d	c	b	a	Z	Y	X	W	V	U	T	S	R	Q	P	O	N	M	L	K	J	I	H	G	F	E	D	C	B	A
Reset 0x00000000				0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Id	RW	Field	Value Id	Value								Description
A	RW	REGION96										Enable protection for region 96. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
B	RW	REGION97										Enable protection for region 97. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
C	RW	REGION98										Enable protection for region 98. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
D	RW	REGION99										Enable protection for region 99. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
E	RW	REGION100										Enable protection for region 100. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
F	RW	REGION101										Enable protection for region 101. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
G	RW	REGION102										Enable protection for region 102. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
H	RW	REGION103										Enable protection for region 103. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
I	RW	REGION104										Enable protection for region 104. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
J	RW	REGION105										Enable protection for region 105. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
K	RW	REGION106										Enable protection for region 106. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
L	RW	REGION107										Enable protection for region 107. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
M	RW	REGION108										Enable protection for region 108. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
N	RW	REGION109										Enable protection for region 109. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
O	RW	REGION110										Enable protection for region 110. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
P	RW	REGION111										Enable protection for region 111. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Q	RW	REGION112										Enable protection for region 112. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
R	RW	REGION113										Enable protection for region 113. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
S	RW	REGION114										Enable protection for region 114. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
T	RW	REGION115										Enable protection for region 115. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
U	RW	REGION116										Enable protection for region 116. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
V	RW	REGION117										Enable protection for region 117. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
W	RW	REGION118										Enable protection for region 118. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
X	RW	REGION119										Enable protection for region 119. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Y	RW	REGION120										Enable protection for region 120. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
Z	RW	REGION121										Enable protection for region 121. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
a	RW	REGION122										Enable protection for region 122. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
b	RW	REGION123										Enable protection for region 123. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
c	RW	REGION124										Enable protection for region 124. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
d	RW	REGION125										Enable protection for region 125. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
e	RW	REGION126										Enable protection for region 126. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled
f	RW	REGION127										Enable protection for region 127. Write '0' has no effect.
			Disabled	0								Protection disabled
			Enabled	1								Protection enabled