EDESR External Debug Event Status Register EDESR is in the Core power domain Debug 0x020 EDESR When DoubleLockStatus() or !IsCorePowered() ERROR When SoftwareLockStatus(addrdesc) RO RW Indicates the status of internally pending Halting debug events. Debug EDESR is a 32-bit register. 31 4 31:4 Reserved, RES0. EC 3 3 0 Exception Catch debug event pending. 0b0 Exception Catch debug event is not pending. 0b1 Exception Catch debug event is pending. '0' W1C When FEAT_Debugv8p8 is implemented 3 3 3 Reserved, RES0. Otherwise SS 2 2 0 Halting step debug event pending. Possible values of this field are: 0b0 Reading this means that a Halting step debug event is not pending. Writing this means no action. 0b1 Reading this means that a Halting step debug event is pending. Writing this clears the pending Halting step debug event. '0' When FEAT_DoPD is implemented SS 2 2 0 Halting step debug event pending. Possible values of this field are: 0b0 Reading this means that a Halting step debug event is not pending. Writing this means no action. 0b1 Reading this means that a Halting step debug event is pending. Writing this clears the pending Halting step debug event. EDECR SS Otherwise RC 1 1 1 Reset Catch debug event pending. Possible values of this field are: 0b0 Reading this means that a Reset Catch debug event is not pending. Writing this means no action. 0b1 Reading this means that a Reset Catch debug event is pending. Writing this clears the pending Reset Catch debug event. CTIDEVCTL RCE EDECR RCE OSUC 0 0 0 OS Unlock Catch debug event pending. Possible values of this field are: 0b0 Reading this means that an OS Unlock Catch debug event is not pending. Writing this means no action. 0b1 Reading this means that an OS Unlock Catch debug event is pending. Writing this clears the pending OS Unlock Catch debug event. '0' If a request to clear a pending Halting debug event is received at or about the time when halting becomes allowed, it is CONSTRAINED UNPREDICTABLE whether the event is taken. If Core power is removed while a Halting debug event is pending, it is lost. However, it might become pending again when the Core is powered back on and Cold reset. 2026-03-26 20:27:25 2026-03_rel