User Manual
Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 151 of 909 2019 Ambiq Micro, Inc.
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3.8.2.38 FLASHWPROT1 Register
Flash Write Protection Bits
OFFSET: 0x000003A4
INSTANCE 0 ADDRESS: 0x400203A4
These bits write-protect flash in 16KB chunks.
3.8.2.39 FLASHRPROT0 Register
Flash Read Protection Bits
OFFSET: 0x000003B0
INSTANCE 0 ADDRESS: 0x400203B0
These bits read-protect flash in 16KB chunks.
Table 204: FLASHWPROT0 Register Bits
Bit Name Reset RW Description
31:0 FW0BITS 0x0 RW
Write protect flash 0x00000000 - 0x0007FFFF. Each bit provides write pro-
tection for 16KB chunks of flash data space. Bits are cleared by writing a 1
to the bit. When read, 0 indicates the region is protected. Bits are sticky
(can be set when PROTLOCK is 1, but only cleared by reset)
Table 205: FLASHWPROT1 Register
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
FW1BITS
Table 206: FLASHWPROT1 Register Bits
Bit Name Reset RW Description
31:0 FW1BITS 0x0 RW
Write protect flash 0x00080000 - 0x000FFFFF. Each bit provides write pro-
tection for 16KB chunks of flash data space. Bits are cleared by writing a 1
to the bit. When read, 0 indicates the region is protected. Bits are sticky
(can be set when PROTLOCK is 1, but only cleared by reset)
Table 207: FLASHRPROT0 Register
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
FR0BITS