READING A 16-BIT BUS WITH THE TMS320C5X SERIAL PORT

It is possible to read data directly from a parallel bus. Each word is loaded by a signal, for example /WE. In order to read this kind of word with a synchronous serial port, it has to be converted in series and synchronized by a transmission clock. The solution presented in this document uses the clock signal coming from the DSP, although an independent clock source could be implemented successfully. This solution contains two 8-bit registers instead of one single 16-bit register, such as a 74LS674, because if the bus is only 8 bits wide, you must remove one to adapt the device. A complete schematic of the solution is provided.

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