SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Off-chip debug tools are able to access On-Chip debug resources via the JTAG interface.
A CoreSight™ Compliant DAP architecture provides access via a DP and a collection of APs:
The DAPBUS Interconnect functions in the DebugSS core clock domain. DAPBUS Async bridges are implemented DAPBUS and the Security-AP controller (Security logic clock), and the DAPBUS and the AHB-AP (system bus clock).
A DAP can include multiple Access Ports. An AP is responsible for accessing debug component registers, such as processor debug logic, ETM and trace port registers. These accesses are made in response to APACC accesses in a manner defined by the AP. The DebugSS has core DAPBUS interconnect that maps the controller interface of the SWJ-DP to the target interfaces on the various APs and CortexM ports. Table below shows the mapping of the targets on the interconnect.
| APSEL | Target |
|---|---|
| 0x0 | CortexM[0] |
| 0x1 | Reserved |
| 0x2 | Reserved |
| 0x3 | Reserved |
| 0x4 | CFG-AP |
| 0x5 | APB-AP* |
| 0x6 | AHB-AP* |
| 0x7 | Power-AP* |
| 0x8 | Security-AP* |
| 0x9 | Reserved |
| 0xA | Reserved |
| 0xB - 0xFF | Reserved |