Maxon Electronics Australia Pty. Ltd. MM-5500SU 사용자 설명서
FCC Documentation
MM-5500SU CDMA 1X/EVDO Modem
14/14
Confidential and proprietary information.
This document is the sole and exclusive property of Maxon Australia.
Not to be distributed or divulged without prior written agreement.
This document is the sole and exclusive property of Maxon Australia.
Not to be distributed or divulged without prior written agreement.
5. Circuit description
5.1 MM-5500SU interface board circuit description
The MM-5500SU interface board consists of the CDMA Engine(Model name: CCE-550),
power generation part, RS-232 & USB transceiver part, LED driver part and connectors. The
Fig 1-1 is block diagram of MM-5500SU interface board and CDMA Engine.
MM-5500SU interface board
protection
DC
Regulator
CDMA Engine(CCE-550)
Power
interface
MSM5500
Memory
-Flash(32Mb)
-SRAM(08Mb)
Rx
Synthesizer
DUX
Tx
RF part
RF Vcc
LNA
Power
Amp
LED driver
protection
protection
Power
port
RS-232
port
USB
port
Antenna
port
System
connector
USB
transceiver
Figure 7. MM-5500SU interface board block diagram
5.2 Power generating part (MM-5500SU interface board)
DC Power is supplied by external source – battery or adaptor- operating over 5V to 7V range.
- DC Regulator: This component is regulator that accepts input voltage up to 6V DC. Output
voltage is about 3.75V DC.
This DC regulator output voltage is inputted to CDMA Engine pin (pin signal name: VBATT).