MC92307中文資料摩托羅拉數(shù)據(jù)手冊PDF規(guī)格書

The MC92307 is a pipelined Fast Fourier Transformation (FFT) processor with a blocklength of 2048 complex samples. It is especially designed for use in digital terrestrial Set-Top boxes according to the DVB-T standard for 2K transmission. One block of 2048 complex samples can be processed in 224 μs

Feature Summary

? Processing of one block of 2048 complex samples (i.e. one 2K-OFDM symbol) in 224 μs.

? Designed for direct interfacing with Motorola’s OFDM demodulator MC92308.

? Input wordlength 8 bit, output accuracy selectable between 10 and 12 bit.

? Overflow on certain OFDM subcarriers due to co-channel interferes is handled internally.

? Readout of output samples can be shifted by half the blocklength to start at the middle of the output block.

? Either multiplexed or non-multiplexed input and output format (the multiplexed mode allows direct interfacing with Motorola’s OFDM Demodulator MC92308).

? Internal Bit reversal can be disabled to allow the construction of FFT modules for blocklengths > 2K by using several devices in parallel.

? Low clock rate inputs and outputs.

? 0.5μm CMOS process at 3.3 V.

? 5 V tolerant inputs and outputs.