Datasheet

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Lockup

The processor enters a lockup state if a hard fault occurs when executing the NMI or hard fault handlers. When the

processor is in lockup state, it does not execute any instructions. The processor remains in lockup state until either:

 It is reset

 An NMI occurs

 It is halted by a debugger.

Note: If the lockup state occurs from the NMI handler, a subsequent NMI does not cause the processor to leave the

lockup state.

Memory

management fault

MMFSR SCB_MMFAR

“MMFSR: Memory Management Fault

Status Subregister”

“MemManage Fault Address Register”

Bus fault BFSR SCB_BFAR

“BFSR: Bus Fault Status Subregister”

“Bus Fault Address Register”

Usage fault UFSR -

“UFSR: Usage Fault Status

Subregister”

Table 12-12. Fault Status and Fault Address Registers (Continued)

Handler Status Register

Name

Address