2.8. Granular Power Requestor

The GPR enables a debugger to control powerup and powerdown of specific components within a debug and trace sub system. Without the GPR, the CoreSight DAP components only support system level powerup and powerdown of the entire CoreSight system. The finer granularity provided by the GPR enables implementation of power strategies during both debug and ATPG testing.

The GPR has a configurable number of power-control interfaces, up to 32. Synchronizers are implemented on the cpwrupack input signals, enabling the power-control interfaces to connect to components in a different clock domain.

Figure 2.33 shows the external connections on the GPR.

You must configure the GPR during implementation with the following parameters:

Figure 2.33. Granular Power Requestor block diagram

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