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| GC5016 Datasheet, PDF (38/88 Pages) Texas Instruments – WIDEBAND QUAD DIGITAL DOWN CONVERTER/ UP CONVERTER | |||
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GC5016
SLWS142G â JANUARY 2003 â REVISED NOVEMBER 2005
14.2.5 8bit IQ Parallel
www.ti.com
The GC5016 may also be configured to accept input data with 8 bits of I and 8 bits of Q in parallel. I MSB should be
placed at AI[15] and Q MSB at AI[7] (or BI, CI, or DI). This mode is valid only for 8-bit I and 8-bit Q using 16 pins.
Applications with fewer bits usually connect the unused bits to GND.
14.2.6 Multichannel Time Division Multiplex
The A port may also be used as the source for all channels configured to accept input data. In TDM mode, the channel
order is A, B, C, D. The Frame Strobe is set high and low marking the start of the transmit input frame. The 1â>0
transition of Frame Strobe and clock transition mark time 0 (tinf_fs_dly = 0) of the input data sequence. There are
three possible TDM sequences, depending on the desired number of bits, splitiq mode, and number of channels:
4 channel TDM, 12 or 16 bits for I or Q â> IA, QA, IB, QB, IC, QC, ID, and QD
4 channel TDM, 8bit IQ parallel mode â> IQA, IQB, IQC, IQD
2 channel TDM, split IQ, 12 or 16 bits â> IA, QA, IB, QB
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