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NRF52820-QDAA-R Datasheet(PDF) 95 Page - Nordic Semiconductor

No. de pieza NRF52820-QDAA-R
Descripción Electrónicos  nRF52820
PDF  437 Pages
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Fabricante Electrónico  NORDIC [Nordic Semiconductor]
Página de inicio  https://www.nordicsemi.com/
Logo NORDIC - Nordic Semiconductor

NRF52820-QDAA-R Datasheet(HTML) 95 Page - Nordic Semiconductor

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Peripherals
Access control to a configured region is enforced by the hardware two CPU clock cycles after the ADDR,
SIZE, and PERM registers for an ACL instance have been successfully written. The protection is only
enforced if a valid start address of the flash page boundary is written into the ADDR register, and the
values of the SIZE and PERM registers are not zero.
The ADDR, SIZE, and PERM registers can only be written once. All ACL configuration registers are cleared
on reset (by resetting the device from any reset source), which is also the only way of clearing the
configuration registers. To ensure that the desired permission schemes are always enforced by the ACL
peripheral, the device boot sequence must perform the necessary configuration.
Debugger read access to a read-protected region will be Read-As-Zero (RAZ), while debugger write access
to a write-protected region will be Write-Ignored (WI).
6.3.1 Registers
Base address
Peripheral
Instance
Description
Configuration
0x4001E000
ACL
ACL
Access control lists
Table 25: Instances
Register
Offset
Description
ACL[0].ADDR
0x800
Start address of region to protect. The start address must be word-aligned.
ACL[0].SIZE
0x804
Size of region to protect counting from address ACL[0].ADDR. Write '0' as no effect.
ACL[0].PERM
0x808
Access permissions for region 0 as defined by start address ACL[0].ADDR and size ACL[0].SIZE
ACL[0].UNUSED0
0x80C
Reserved
ACL[1].ADDR
0x810
Start address of region to protect. The start address must be word-aligned.
ACL[1].SIZE
0x814
Size of region to protect counting from address ACL[1].ADDR. Write '0' as no effect.
ACL[1].PERM
0x818
Access permissions for region 1 as defined by start address ACL[1].ADDR and size ACL[1].SIZE
ACL[1].UNUSED0
0x81C
Reserved
ACL[2].ADDR
0x820
Start address of region to protect. The start address must be word-aligned.
ACL[2].SIZE
0x824
Size of region to protect counting from address ACL[2].ADDR. Write '0' as no effect.
ACL[2].PERM
0x828
Access permissions for region 2 as defined by start address ACL[2].ADDR and size ACL[2].SIZE
ACL[2].UNUSED0
0x82C
Reserved
ACL[3].ADDR
0x830
Start address of region to protect. The start address must be word-aligned.
ACL[3].SIZE
0x834
Size of region to protect counting from address ACL[3].ADDR. Write '0' as no effect.
ACL[3].PERM
0x838
Access permissions for region 3 as defined by start address ACL[3].ADDR and size ACL[3].SIZE
ACL[3].UNUSED0
0x83C
Reserved
ACL[4].ADDR
0x840
Start address of region to protect. The start address must be word-aligned.
ACL[4].SIZE
0x844
Size of region to protect counting from address ACL[4].ADDR. Write '0' as no effect.
ACL[4].PERM
0x848
Access permissions for region 4 as defined by start address ACL[4].ADDR and size ACL[4].SIZE
ACL[4].UNUSED0
0x84C
Reserved
ACL[5].ADDR
0x850
Start address of region to protect. The start address must be word-aligned.
ACL[5].SIZE
0x854
Size of region to protect counting from address ACL[5].ADDR. Write '0' as no effect.
ACL[5].PERM
0x858
Access permissions for region 5 as defined by start address ACL[5].ADDR and size ACL[5].SIZE
ACL[5].UNUSED0
0x85C
Reserved
ACL[6].ADDR
0x860
Start address of region to protect. The start address must be word-aligned.
ACL[6].SIZE
0x864
Size of region to protect counting from address ACL[6].ADDR. Write '0' as no effect.
ACL[6].PERM
0x868
Access permissions for region 6 as defined by start address ACL[6].ADDR and size ACL[6].SIZE
ACL[6].UNUSED0
0x86C
Reserved
ACL[7].ADDR
0x870
Start address of region to protect. The start address must be word-aligned.
ACL[7].SIZE
0x874
Size of region to protect counting from address ACL[7].ADDR. Write '0' as no effect.
ACL[7].PERM
0x878
Access permissions for region 7 as defined by start address ACL[7].ADDR and size ACL[7].SIZE
4463_156 v1.0
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