MSM(5100):A16
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BOARD - P6.0
The MSM5100 device is the centerpiece of the chipset made up of the MSM5100 mobile station
modem, the RFT3100 analog baseband to RF up converter, the IFR3300 IF to baseband down
converter, the RFR3300 RF to IF down converter, and the PM1000 power management ASIC.
For the receive data path (Rx), the RFR3300 device down converts the received RF signal to the
intermediate frequency (IF). The IFR3300 device converts the modulated IF signal from the RFR3100
device into digital baseband data. Finally, the MSM5100 device demodulates Rx digital baseband data
from the IFR3300 device. This path also down converts the GPS received signals to interface with the
gpsOne processor on the MSM5100 device. For the transmit data path (Tx), the MSM5100 device
modulates, interpolates, and converts the digital signal into an analog baseband before sending it to
the RFT3100 device. The RFT3100 device up converts the Tx analog baseband into RF. The
MSM5100 device communicates with the external RF and analog baseband to control signal gain in the
RF Rx and Tx signal paths, reduce baseband offset errors, and tune the system frequency reference.
For the receive data path (Rx), the RFR3100 down converts the received RF signal of the
intermediate frequency (IF). The IFR3000 converts the modulated IF signal from the RFR3100 into
digital baseband data. Finally, the MSM5100 demodulates Rx digital baseband data from the IFR3000.
For the transmit data path (Tx), the MSM5100 modulates, interpolates, and converts the digital
signal into an analog baseband before sending it to the RFT3100. The RFT3100 up converts the T
analog baseband into RF. The MSM5100 communicates with the external RF and analog baseband to
control signal gain in the RF Rx and Tx signal paths, reduce baseband offset errors, and tune the
system frequency reference.
QUALCOMM also supplies system software and development tools to minimize the developmen
time of a subscriber unit. With the release of the MSM5100, a new, optimized version of Dual Mode
Subscriber Software (DMSS) is available with device driver support for the new functionality of the
MSM5100. Additionally, the Subscriber Unit ReFerence design (SURF) offers a baseline hardware
platform for additional software development.
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