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.
