Method of power control system for a PDA with a microprocessor

Details Method of power control system for a PDA with a microprocessor Method of power control system for a PDA with a microprocessor

2005-05-31

2005-05-31

Wachsman, Hal D (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S060000, C702S064000, C713S300000

Reexamination Certificate

active

06901338

ABSTRACT:
A method for managing a power control system of a PDA (personal digital assistant) with a microprocessor. The PDA includes a CPU (central processing unit) for processing data and a microprocessor for controlling power control system functions including: switching the PDA from OFF mode to SHUTDOWN mode, such that when the PDA is in OFF mode, the CPU and the microprocessor are both off, and when the PDA is in SHUTDOWN mode, the CPU is off while the microprocessor is on; switching the PDA from SHUTDOWN mode to ON mode, such that when the PDA is in ON mode, the CPU and the microprocessor are both on; and, switching the PDA between SHUTDOWN mode and STANDBY mode, such that when the PDA is in STANDBY mode, the CPU idles and the microprocessor sleeps.

REFERENCES:
patent: 5581772 (1996-12-01), Nanno et al.
patent: 5708816 (1998-01-01), Culbert
patent: 5790875 (1998-08-01), Andersin et al.

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