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Johnson · Guest

Hello,

I am about to develop a compact flash gps receiver for PDA (TDS Recon
or PocketPC or others), and the power consumption is very critical.

A senior CF developer suggested me to use low power microcontroller
such as a simple PIC or an AVR (8 to 16 bits) for this type of
application, other than FPGA/CPLD, because he thought FPGA is very
expensive and very bad for critical consumption applications.

I think he is right if I only want to do a simple interface between
the GPS OEM and the PDA. However, I am thinking about to provide more
functionalities and flexibilities, like to support "Sleep" mode of the
GPS OEM to save power further and the customer can modify the sleep
time from an utility software at PDA side. Moreover, I want to support
all three modes of CF (Memory, I/O, and true IDE), (not sure how
important they are). Could anybody please let me know which design is
better for these functionalities, low-cost FPGA/CPLD, or low-cost DSP,
or low power microcontroller?

Thanks in advance.

Johnson

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