Intel's 80960HA/HD/HT processor (abbreviated Hx) does not support a low power Halt mode, contrary to some prior claims. However, some customers want to reduce power consumption and heat dissipation during idle times. The customer expectations have been set by the 80960JA/JF processor (abbreviated Jx) that does offer a Halt mode that provides about 90% power reduction during idle times.
This paper explains three techniques to reduce the Hx processor power dissipation during idle times. The three techniques are:
1. Minimum power software loop
2. Reduced clock frequency
3. ONCE mode
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hxlopwr.pdf
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