About CoreSight ELA-500
The Arm CoreSight ELA-500 Embedded Logic Analyzer provides an effective way to observe low-level signals, by offering a way to zoom into the root cause of data corruption. You can program the ELA-500 to trigger signal capture in response to a particular event, in addition to causing triggers elsewhere in the SoC to further help with the debug process.
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The ELA-500 addresses many of the Design For Test (DFT) methodology requirements, by making products inherently debuggable at all stages of their lifecycle.
Multiple ELAs can be instantiated in a SoC to monitor system signals, each tightly coupled with associated IP, such as a processor or a Cache Coherent Interconnect (CCI). You can create a cross-trigger network alongside these ELAs to send and receive trigger signals, and expanding visibility to the whole SoC. Also, ELA trigger outputs can be used to control clock-gating for a scan dump of registers values.
- Programmable over debug APB using an external debugger or processor for trigger condition setup.
- Generate trigger from one of up to 12 × 128-bit signal groups using assertion-styled conditions.
- Trigger conditions that are built by using trigger state transitions, event counting, comparators for criteria evaluation, and signal masking.
- Trace capture selected signal group in embedded SRAM, configurable size 4k to 64k, for later analysis or waveform capture over time. Supports trace filtering.
- Trigger alongside other ELAs and SoC components over a CoreSight Cross Trigger Interface (CTI).
- Program up to four trigger states in any sequence, including loops.
- Each trigger state can select one of the 12 signal groups as input for trigger conditions.
- Each trigger condition is programmable for comparisons (=, !=, >, >=, <, <=) to mask, and match, any combination of 128 signals.
- Each trigger state has a 32-bit counter input.
- Program up to eight output actions that can be triggered for each trigger state.
CoreSight ELA-500 Technical Reference Manual
For system designers, systems integrators, and programmers who are designing a SoC, the Technical Reference Manual is the go-to resource.CoreSightELA-500 TRM
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