MC92307

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Current information @www.mot.com.sps/ADC MC92307 Advance Information 2K - Samples FFT-Processor RESB CLK SYMSYNC 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. DOUT[11:0] DOUTR[11:0] NOMUX OFFSET RES[1:0] FFTSTART io n DIN[7:0] DINR[7:0] m at Ordering Information In fo r Device MC92307CI Package 160QFP el im NOMUX DIN 8 in ar y...