A.1.3. Debug signals

The inputs can change at run-time and you must synchronize them to the CCI-400 clock to prevent timing hazards. Table A.3 shows the debug signals.

Table A.3. Debug signals

Signal

Direction

Description

NIDEN

Input

Non-invasive debug enable. If HIGH, enables the counting and export of PMU events.

SPNIDEN

Input

Secure privileged non-invasive debug enable. If HIGH, enables the counting of both Non-secure and Secure event.

EVNTBUS[158:0]

Output

CCI-400 events, exported if enabled in the PMCR. See PMU event list for information on the pin allocations of this vector.

nEVNTCNTOVERFLOW[4:0]

Output

Overflow flags for the PMU clock and counters, active-LOW. The CCNT overflow is bit 4, event counters on bits[3:0].

nERRORIRQ

Output

Indicates that an error response, DECERR or SLVERR, has been received on the RRESP or BRESP inputs, that cannot be signalled precisely. If LOW, indicates that an error has occurred.

EVNTARQOSx[3:0]

Output

Value that the QoS value regulator of slave interface x last applied to ARQOS.[a]

EVNTAWQOSx[3:0]

Output

Value that the QoS value regulator of slave interface x last applied to AWQOS.[a]

[a] Where x is 0-4.


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