Freescale Semiconductor MC13853 LNA, Руководство пользователя

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Initial Instructions
MC13853 LNA Evaluation Board User’s Guide, Rev. 1.3
1-2 Freescale Semiconductor
1.2 Serial Peripheral Interface
Control of the basic functions of the MC13853 can be accomplished via a SPI three-wire (data, clock, and
frm) connection to the evaluation board. In order to control the LNA the following is required:
• PC computer laptop:
— Parallel port
— Microsoft
®
Windows
®
NT or better (such as Windows 2000 or Windows XP) operating system
installed
— CD-ROM drive at least 40 MB of free hard drive space
— 256 MB of RAM
• SPI control software installed on the PC
• Freescale MMM6038SPI
• Small power supply to d5 VDC at approximately 5 mA to the MMM6038SPI
• Parallel cable with DB25 connectors (PC to SPI)
• Short length of wire ribbon between the SPI board and the evaluation board. Set the length to
accommodate movement of the evaluation board on the test bench.
The control software resides in the PC computer running Microsoft Windows operating system. A parallel
interface is used between the PC and the MMM6038SPI.
Keep all control wiring away from the strong RF fields created by the power amplifier, particularly around
the module and antenna connection. ESD precautions should be taken in the set-up and as a minimum all
equipment, SPI and EVB components should be grounded.
Figure 1-1 shows the SPI to EVB
interconnecting details. Figure 1-2 illustrates the actual top view of the MMM6038SPI.
Details of the GUI and controlled parameters are shown in Figure 1-4 .
NOTE
The MMM6038SPI contains a FPGA (Lattice Semiconductor) with the
code written into a flash memory (ST Microelectronics). Aside from
interconnections, no user intervention is required. The board is powered by
+5 VDC connected to the red jack and the black jack is ground. Once the
supply is applied, a green LED will turn on indicating the presence of power.
Various LDO internal regulators provide the necessary operating voltages.