VIPER Technical Manual | Power and power management |
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The current values in the tables below are referenced from running the VIPER at 400MHz in performance mode whilst the VIPER is idle.
The positive values (not shown in brackets) are the current saving by running the VIPER at slower frequencies or in power saving mode.
The negative values are the current increases that can be expected whilst the processor is near maximum activity load.
The values shown in brackets show the total current of the VIPER from the 5V supply before taking into account any power savings from shutting down VIPER features or including additional current for external peripherals.
Please refer to the relevant operating system Quickstart Manual to select an alternative operating frequency.
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| Current saving from 5V when processor core is in performance mode | ||||
Processor | Vcore (V) | 400MHz | 266MHz | 200MHz | 133MHz | Asleep |
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| CCCR=0x161 | CCCR=0x143 | CCCR=0x141 | CCCR=0x123 | |
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Active | 1.29 | - | - | - | - | |
Active | 1.1 | - | - | - | - | |
Active | 1.06 | - | - | - | ||
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Idle | 1.29 | 0mA (334mA) | - | - | - | - |
[Linux default] |
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Idle | 1.1 | - | 7mA (327mA) | - | - | - |
Idle | 1.06 | - | - | 7mA (327mA) | 12mA (322mA) | - |
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Asleep | 0 | - | - | - | - | 54mA (271mA) |
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© 2007 Eurotech Ltd Issue E | 75 |