System Processing Description
N5500 Service Manual 83
Technical
Information, N5500
Unit Description
l
Power unit :
consists of power entry module, SMPS, battery charger, battery, external
DC input and DC/DC unit.
SMPS
Power Entry
Module
AC 100-250V
50Hz/60Hz
NI-MH
Battery Charger
DC
Entry
Con
Input
Selection
DC 10 - 16V
DC 12 - 16.8V
DC10 - 19V
SMPS OUTPUT Status
Figure 12. Power Unit Block Diagram
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Processor unit :
consists of Samsung S3C44B0X CPU, SDRSM, Boot ROM and
Flash.
S3C44B0X
SDRAM
Boot
Memory
Selection
Signal
FLASH
Boot ROM
Boot Memory Selector
UART
RTC
Watch Dog
Timer
GPIO
SDRAM
Data
Source Program /
Source Program
Selection Switch
SpO2 Unit
IOP Unit
Coin Cell Battery Power
Control Signal
Status Input
Trend,Setup data
Figure 13. Process Unit Block Diagram
l
User-control unit :
consists of 1 power on/off switch, 4 functional switch, optical
encoder, power on indicator LED, AC power indicator LED and low battery indicator
LED.
Buttons
Optical Encoder
with
Push Button
TO S3C44B0X (Processor Unit) General
Purpose Port
TO S3C44B0X (Processor Unit) External
Interrut
Figure 14. User-Control Unit Block Diagram
Содержание OxiMax N 5500
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