User Manual
Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 154 of 909 2019 Ambiq Micro, Inc.
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3.8.2.44 DMASRAMREADPROTECT1 Register
SRAM read-protection bits.
OFFSET: 0x000003D4
INSTANCE 0 ADDRESS: 0x400203D4
These bits read-protect system SRAM from DMA operations in 8KB chunks.
3.9 Memory Subsystem
Table 216: DMASRAMREADPROTECT0 Register Bits
Bit Name Reset RW Description
31:0 DMA_RPROT0 0x0 RW
Read protect SRAM from DMA. Each bit provides write protection for an
8KB region of memory. When set to 1, the region will be protected from
DMA reads, when set to 0, DMA may read the region.
Table 217: DMASRAMREADPROTECT1 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
RSVD DMA_RPROT1
Table 218: DMASRAMREADPROTECT1 Register Bits
Bit Name Reset RW Description
31:16 RSVD 0x0 RO
RESERVED.
15:0 DMA_RPROT1 0x0 RW
Read protect SRAM from DMA. Each bit provides write protection for an
8KB region of memory. When set to 1, the region will be protected from
DMA reads, when set to 0, DMA may read the region.