What space the benefits and defect of serial and also parallel mode?
Serial mode offers the advantage of under traces on the pc board, and fewer pins on the devices. Parallel provides the benefit of carrying 8 data bits per I/O clock cycle, however at the disadvantage the many much more pins forced on the devices.
Overall, the parallel mode offers the benefit of much faster loading that the registers, however with the disadvantage that requiring an ext interconnect traces. The serial mode offers simplicity, yet with less speed.
In some cases, one application might require a data update price which deserve to be accomplished while using the parallel mode, yet which might not be completed while using the serial mode as result of its slower update rate.
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