NRF9160-SICA-R7 datasheet(265/400 Pages) NORDIC

265 / 400 page

Peripherals

RAMREGION[0].PERM

RAMNSC[0].REGION == n

Access

control

RAMREGION[n].PERM

SPU registers

Region #n

(secure)

NSC subregion 0

RAMNSC[0].SIZE == m

m !=0

Region

size

RAM address space

Region #n-1

Region #n+1

2(m+4) bytes

Figure 84: Non-secure callable region definition in the RAM memory space

The NSC sub-region will only be defined if:

• RAMNSC[i].SIZE value is non zero

• RAMNSC[i].REGION defines a secure region

If RAMNSC[i].REGION and RAMNSC[j].REGION have the same value, there is only one sub-region defined

as NSC, with the size given by the maximum of RAMNSC[i].SIZE and RAMNSC[j].SIZE.

If RAMNSC[i].REGION defines a non-secure region, then there is no non-secure callable region defined and

the selected region stays non-secure.

6.15.3.2 RAM access error reporting

The SPU and the logic controlled by it will respond with a certain behavior once an access violation is

detected.

The following will happen once the logic controlled by the SPU detects an access violation on one of the

RAM ports:

• The faulty transfer will be blocked

• In case of a read transfer, the bus will be driven to zero

• Feedback will be sent to the master through specific bus error signals, if this is supported by the master

• SecureFault exception will be triggered if security violation is detected for access from Cortex-M33

• BusFault exception will be triggered when read/write/execute protection violation is detected for

Cortex-M33. The SPU will also generate an event that can optionally trigger an interrupt towards the

CPU.

• RAMACCERR event will be triggered if any access violations are detected for all master types but for

Cortex-M33 security violation

The following table summarizes the SPU behavior based on the type of initiator and access violation:

4418_1315 v2.0

265

NRF9160-SICA-R7 Datasheet(PDF) 265 Page - Nordic Semiconductor

NRF9160-SICA-R7 Datasheet(HTML) 265 Page - Nordic Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL