EDAN SE-601B - Key Board Description; WIFI Module Description (Optional)

SE-601 Series Electrocardiograph Service Manual Overview
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3.2.4 Key Board Description
The key board is shown in the figure below. When a key is pressed down, the interrupt logic of
key matrix emits an interrupt signal. After CPU (ATmega161) detects the interrupt signal, it reads
the key by row scan and column scan, and sends values to the main board through the serial port.
Figure 3-5 Key Board Diagram
3.2.5 WIFI Module Description (Optional)
WIFI Module Carrier
Interface
between
signal and
power
supply
WIFI Module
Figure 3-6 WIFI Module Diagram
The WIFI module is shown in the figure below. CPU interacts with WIFI module through the
interface of the power supply to transmit and receive the wireless signal.
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