Electrical computers and digital processing systems: support – Computer power control
Reexamination Certificate
2006-11-21
2006-11-21
Lee, Thomas (Department: 2115)
Electrical computers and digital processing systems: support
Computer power control
C713S320000, C365S227000
Reexamination Certificate
active
07139919
ABSTRACT:
A power saving type information processing apparatus is provided which is not expensive and can provide a high interruption performance without using an expensive and dedicated memory and a complicated software process. After an SDRAM setting register of an SDRAM controller outputs a SELF allowance signal for allowing SDRAM to transfer to a power saving mode from a normal operation mode, a WAITI command fetch detecting circuit outputs a WAITI command detecting signal. In this case, SDRAM is made to transfer to the power saving mode. If a CPU detects an external interruption while SDRAM is in the power saving mode, SDRAM is returned to the normal operation mode irrespective of settings of the SDRAM setting register.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Lee Thomas
Suryawanshi Suresh K
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