I have the following code which gives me undefines on the output (DATAOUT). Clocking must be done at the right baud rate for the serial output to be at the right speed. Making pin 1 high will allow clocking of the data towards the serial output, pin 9. Check the modified blocks with a test-bench. I am trying to mux two streams into one from 1x rate input to a 2x rate output. Making pin 1 low will load the parallel data from the 8 data input pins. If the receiver de-asserts this line, the transmitter will keep (freeze) the last bit sent on the line, until the ‘receiver ready’ signal is asserted again. Same as 1, but now the ‘receiver ready’ line serves as a flow control line.Modify both blocks and test them with a modified test-bench. The Parallel to serial converter will sample this line and will start a new transmission only if this line is asserted. Add a ‘receiver ready’ line, as an output from the Serial to parallel converter. 1 Answer Active Oldest Votes 7 'Parallel to Serial' and 'Serial to Parallel' respectively.On the waveform below it can be seen the transmitted data and the received data by the ser2par module.Īll the source files for this simulation can be found here. According to the prior art, a first clock signal the transfer of incoming parallel data words to outputs of the parallel-to-parallel register whereas the loading of the parallel-to-parallel register is rhythmed by a second clock signal which is independent of the first clock.
The received data is available in parallel format on the data_outbus.įor the simulation, the Parallel to serial converter is used to generate data and the ser2par receives the data. Typically, a parallel-to-serial converter comprises a parallel-to-parallel register and a parallel-to-serial register. The received data is available in parallel format on the dataout bus. If a framein signal is detected, the data is latched in and the datardy output is asserted until the rd input is asserted by the host. 54165, datasheet for 54165 - 8-Bit Parallel-to-Serial Converter provided by National Semiconductor. If a frame_insignal is detected, the data is latched in and the data_rdyoutput is asserted until the rdinput is asserted by the host. This VHDL module receives serial data from the datain line.
#PARALLEL TO SERIAL CONVERTER WHAT IS IT SOFTWARE#
Its internal strapping option converts the parallel BUSY signal to the appropriate signal on the serial interface for hardware or software flow control. Go ahead-use your existing parallel printer with your serial PC! The converter is powered from the RS-232 interface, which makes it easy to use. The SerialParallel Converter is the perfect solution for day-to-day print jobs when all you need are reliable printouts.