84 System Processing Description
Unit
Description
z
Power
unit:
consists
of
power
entry
module,
power
supply,
battery
charger,
battery,
external
DC
input
and
DC/DC
unit.
AC-DC
AC 85-260V
50/60Hz
Charger
DC/DC
Battery
NI-MH 10cell
(9-16V)
Charged for
12 hours
3800mAh
Thermistor
10kohm NTC
Charging cut-off at
5O
℃
FUSE
9-19V 0.5A
(Inrush 1.5A)
5V 2.5A
12V 1.7A
(Inrush 2A)
DC/DC
On/Off
AC on
Battery
Level
Figure
29.
Power
Unit
Block
Diagram
z
Processor
unit:
consists
of
Samsung
S3C2440
CPU,
SDRSM,
Boot
ROM
and
Flash.
SDRAM
Flash Memory
Data
Boot/Source program,
Trend/setup data
S3C2440
ARM9 MCU
UART
RTC
LCD Controller
SPI
Watch Dog
Timer
GPIO
RTC
SpO2 Unit
IOP Unit
Coin Cell
battery
LVDS
Transmitter
A/D
converter
Control Signal
Status Input
UART
Communication data,
Figure
30.
Process
Unit
Block
Diagram
z
User
‐
control
unit:
consists
of
trim
knob,
6
functional
button,
optical
encoder,
power
on
indicator
LED,
AC
indicator
LED
and
battery
charging
status
indicator
LED.
Buttons
Optical Encoder
with
Push Button
S3C2440(Processor Unit) general purpose port
S3C2440(Processor Unit) external interrupt
Figure
31.
User
‐
Control
Unit
Block
Diagram
Summary of Contents for YM6000
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