
Fabius
®
Function Description
2-48
Cop
yr
ight
2000 Dr
aeger
M
edical,
In
c.
sec2_
funcde
scr
ip_
b.fm
10.3.1
Microcontroller
The microcontroller 80C517A controls the functions of the control box.
10.3.2
Quartz Oscillator
The quartz oscillator QOS12Mhz clocks the microcontroller 80C517A with 12 MHz.
10.3.3
EPROM
The EPROM M27C4001 is used to store the program for the control box. It has a
programmable area of 512 kbytes.
10.3.4
EEPROM
The EEPROM X24C04 is a memory chip used to write and read serial data. It
contains the set customer parameters and the zero values of flow, pressure, and O
2
.
10.3.5
RAM
The 32 Kx8 RAM contains the current patient parameters and stores data which the
microcontroller needs to buffer.
10.3.6
Latch
Latch HC373 is a driver block.
10.3.7
Voltage Transformer
The voltage transformer transforms the 5 V input voltage into the ±12 V output
voltage.
10.3.8
Oxygen Concentration Evaluation
The operational amplifier OP07 evaluates the voltage of the O
2
sensor.
10.3.9
Voltage Monitoring Circuit/Voltage Monitor
The IC 7665 monitors the output voltage (+5 V) of the control box. If the voltage is
higher or lower than the specified voltage, the IC 7665 generates a RESET signal.
This RESET signal resets the microcontroller. The IC makes sure that the
microcontroller only initializes when the operating voltage has reached an adequate
level.
Содержание Fabius 4116029
Страница 2: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...
Страница 6: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...
Страница 8: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...
Страница 68: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...
Страница 234: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...
Страница 318: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...
Страница 324: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...
Страница 326: ...RETURN TO CD ROM TABLE OF CONTENTS RETURN TO THIS MANUAL S TABLE OF CONTENTS ...