| Copyright © 2003, 2008 ARM Limited. All rights reserved. | ARM DDI 0304C |
| Non-Confidential | |
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The function of the IEC is to convert the fractional performance level requested by the IEM software to a performance level as supported by the DCG and DVC. This conversion depends on the number of performance levels supported by the DCG and DVC.
This section describes:
Performance level programming and explains:
the format of the fractional numbers used for performance level setting and how these are interpreted by the IEC
the requirements on the minimum and maximum performance levels that must be supplied by the DCG
Configuration setting and explains:
why this is necessary with respect to making the IEC reusable over a wide range of systems
how the IEC quantizes the software programmed performance levels to those supported by the hardware
Target index and current index and explains:
the coding used on the IEC interfaces to the DCG and DVC
| Copyright © 2003, 2008 ARM Limited. All rights reserved. | ARM DDI 0304C |
| Non-Confidential | |
| PDF version | |
| Home > Functional Overview > Functional operation |