Maxon Electronics Australia Pty. Ltd. MM-5100U 사용자 설명서

DC Power is supplied from the USB connector. 

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LDO(U701): This component is low dropout regulator. Output voltage is about 3.8V DC. 

This LDO output voltage is inputted to CDMA Engine power interface. 

Each block of CDMA Engine uses low-drop-output linear regulator. 

-    U500 : voltage regulator for digital circuit ( 2.8 DC )   

-    U501 : voltage regulator for VC-TCXO and IFR3300 ( 3.0V DC ) 

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U502 : voltage regulator for RF Rx part ( 3.0V DC ) 

- 

U503 : voltage regulator for RF Tx part ( 2.85V DC ) 

- 

U505 : voltage regulator for digital part(2.7V DC ) 

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And power AMP is directly supplied. 

-  U400 : MSM(Mobile Station Modem) ASIC is chip responsible for CDMA/FM mobile station’s 

base-band digital signal processing. For this chip to function, TCXO(19.2MHz) is required as 

basic clocks. 

And sleep crystal (32.768KHz) is used as clock source of MSM ASIC. 

MSM consists of CDMA core and DFM core. CDMA core is a part for processing CDMA signal 

consisting of modulator/demodulator, interleaver/deinterleaver and encoder/decoder in the CDMA 

mode. 

-    U401: Memory part consists of Flash memory and SRAM.   

Flash memory: store to main program.       

SRAM: performs to read and write data 

 

- U703: USB transceiver is fully compliant with the USB specification Rev1.1. 

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