Power Management Controller (Pmc) - Micros Systems Workstation 5 Service Manual

Workstation 5 System Board Technical Descriptions
CS5536 Companion Device

Power Management Controller (PMC)

This module is a GeodeLink Device whose function is to control all aspects
of power management. Power Management is event driven - any action the
PMC carries out is predicated on some event. Those events can originate
from other GeodeLink Devices, such as the LX800 processor, or from
other external sources such as the power button.
The PMC consists of three internal sections: Working, Standby, and Real
Time Clock.
The Working block includes all circuits and functions associated with
o
the Working power domain. The primary function of the Working block
is to transition the system to the sleep mode.
Standby block contains all circuits and functions associated with the
o
Standby power domain. The primary function f the Standby block is to
control power to the Working domain.
The RTC block contains the timing circuits required to maintain a real
o
time clock and calender functions. The RTC block is powered by
VBAT, from a board mounted CR2032 battery.
2-10 Workstation 5 Field Service Guide