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2.3.3 Processing and Communications System
Main Board
The main board is the heart of the patient monitor. It implements a series of tasks including
input & output control, data storage and processing, display processing, system control,
communication management, printing management and alarming, etc.
The main board comprises the CPU board and mother board. The following diagram shows
interfaces to other components.
The CPU board is an essential CPU system containing the CPU, FLASH, memory, realtime
clock, EEPROM, etc. It interfaces to the mother board only, which then provides interfaces to
all other external devices.