
94
Unit Description
z Power unit: consists of SMPS and battery charger
AC-DC
AC 100
-240V
50/60Hz
Charger
FUSE
Li-ion Battery
3S1P/2200mAh
3S2P/4400mAh
3S3P/6600mAh
Ex-DC
EXTERNAL DC
13V~15V
FUSE
Vout
10V~15V 2A
FET
DC/DC on,off
V Stanby
Charging LED
Battery Detect
AC Detect
Ex-DC Detect
Charged LED
Figure 29. Power Unit Block Diagram
z Processor unit: consists of Samsung
®
S3C2440A CPU, SDRAM, Boot ROM and
Flash.
SDRAM
Flash Memory
Data
Boot/Source program,
Trend/setup data
S3C2440A
ARM9 CPU
Internal/External
UART
RTC
LCD Controller
SPI
IIC
GPIO
USB
Serial Interface
Unit
IOP Unit
Coin Cell
battery
TTL
Transmitter
A/D converter
Control Signal
Status Input
UART
Communication data,
Speaker
Amplifier
USB Host
Figure 30. Process Unit Block Diagram
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