4.3.15. Power Control Register

The PCR characteristics are:


Enables you to set dynamic clock gating.

Usage constraints

There are no usage constraints.


Available in all configurations.


See the register summary in Table 4.9.

Figure 4.17 shows the PCR bit assignments.

Figure 4.17. PCR bit assignments

To view this graphic, your browser must support the SVG format. Either install a browser with native support, or install an appropriate plugin such as Adobe SVG Viewer.

Table 4.35 shows the PCR bit assignments.

Table 4.35. PCR bit assignments

[0]Enable dynamic clock gatingDisabled at reset.

To access the Power Control Register, read or write the CP15 register with:

MRC p15, 0, <Rd>, c15, c0, 0; Read Power Control Register
MCR p15, 0, <Rd>, c15, c0, 0; Write Power Control Register
Copyright © 2012, 2014 ARM. All rights reserved.ARM DDI 0458C